# GPT-5 — dossier

compiled 2026-07-18 · corpus: 295 matching tweets after RT-filter (patterns: `gpt-5` / `gpt 5` / `gpt5`); of these, 111 (v2) + ~258 (supplement) mention *bare* GPT-5 rather than a sub-version. This dossier is **base GPT-5** (launched 2025-08-07); material specific to GPT-5.1 / 5.2 / 5.4 / 5.5 / 5.6 is routed to `## Cross-page notes` (each has its own page). "GPT-5" here means the August-2025 family: the router, `gpt-5-main` (a.k.a. `gpt-5-chat`), `gpt-5-thinking`, `gpt-5-pro`, and the minis.

Working note: GPT-5's defining event was a *mass-market* one — the botched launch, the model-picker revolt, the 4o-resurrection, the "sensitive-conversations" safety router — and that story lives on Reddit (r/ChatGPT), Hacker News, TechCrunch/Axios and OpenAI's own blog far more than in the janus corpus. So the web sweep carries most of the reception weight here; the corpus supplies the naturalist character-read (poorly socialized, low metacognition, hyper-optimized task-completion) and the alignment-eval throughline (davidad on CoT faithfulness / Redwood-awareness). The eulogy stunt and the keep4o revolt are documented on the **GPT-4o** page — GPT-5's role is central there and is cross-referenced, not duplicated, below.

## Official links

- 2025-08-07 · Introducing GPT-5 (launch; rolled out 10am PDT to Free/Plus/Pro/Team; framed as "our smartest, fastest, most useful model yet," a "unified system" with a real-time router; Altman's "team of Ph.D.-level experts in your pocket") — https://openai.com/index/introducing-gpt-5/
- 2025-08-07 · GPT-5 System Card (PDF) — the launch-day system card; documents the router + variants, "safe completions," sycophancy reduction, deception/CoT-monitoring, Apollo scheming eval, METR autonomy eval, biological safeguards — https://cdn.openai.com/gpt-5-system-card.pdf · versioned copy Zvi cites: https://cdn.openai.com/pdf/8124a3ce-ab78-4f06-96eb-49ea29ffb52f/gpt5-system-card-aug7.pdf · mirrored in repo: `mirror/papers/openai-gpt-5-system-card.pdf`
- 2025-08-07 · From hard refusals to safe-completions: toward output-centric safety training (the "safe completions" method paper — safety of the *output* rather than binary refusal on inferred intent) — https://openai.com/index/gpt-5-safe-completions/ · arXiv: https://arxiv.org/abs/2508.09224
- specs · 400K context window; 128K max output tokens; API snapshot `gpt-5-2025-08-07`. Pricing per Mtok (input/output): GPT-5 **$1.25 / $10.00**, GPT-5-mini **$0.25 / $2.00**, GPT-5-nano **$0.05 / $0.40** [Zvi's post transcribes nano output as $0.04; treat $0.40 as the figure to verify] — https://openai.com/gpt-5/
- variants · the system card's "successor" mapping: `gpt-5-main` ← GPT-4o, `gpt-5-main-mini` ← GPT-4o-mini, `gpt-5-thinking` ← o3, `gpt-5-thinking-mini` ← o4-mini, `gpt-5-thinking-pro` ← o3-pro. Five ChatGPT "personality" presets: Default, Cynic, Robot, Listener, Nerd.
- 2025-08-08 · Sam Altman addresses the "bumpy" rollout, bringing 4o back, and the "chart crime" (Reddit AMA; the autoswitcher/router was "out of commission for part of the day," making GPT-5 "seem way dumber"; promised to restore 4o for Plus, double Plus rate limits; apologized for the misleading launch bar-charts) — https://techcrunch.com/2025/08/08/sam-altman-addresses-bumpy-gpt-5-rollout-bringing-4o-back-and-the-chart-crime/
- 2025-09-02 · OpenAI to route sensitive conversations to GPT-5, introduce parental controls (announces the "sensitive-conversations" routing plan) — https://techcrunch.com/2025/09/02/openai-to-route-sensitive-conversations-to-gpt-5-introduce-parental-controls/
- 2025-09-29 · OpenAI rolls out safety routing system, parental controls on ChatGPT — https://techcrunch.com/2025/09/29/openai-rolls-out-safety-routing-system-parental-controls-on-chatgpt/
- 2025 (addendum) · Addendum to GPT-5 System Card: Sensitive conversations (OpenAI's own account of the safety-model routing) — https://openai.com/index/gpt-5-system-card-sensitive-conversations/
- reference · GPT-5 — Wikipedia — https://en.wikipedia.org/wiki/GPT-5
- deprecation status · GPT-5 superseded in ChatGPT by GPT-5.1 (2025-11-12); check https://developers.openai.com/api/docs/deprecations for API status [verify]

Model identifiers: `gpt-5`, `gpt-5-2025-08-07`, `gpt-5-chat`/`gpt-5-main`, `gpt-5-thinking`, `gpt-5-pro`, `gpt-5-mini`, `gpt-5-nano`, `gpt-5-thinking-mini`; plus the **undocumented `gpt-5-chat-safety`** — the safety model that emotional/sensitive ChatGPT conversations were silently re-routed to (see Impressions §safety router).

## Writings

- 2025-08-11 · Zvi Mowshowitz · GPT-5s Are Alive: Basic Facts, Benchmarks and the Model Card — **the anchor.** Full read of the system card: router confusion ("several good models released at once"), safe completions, sycophancy post-training (gpt-5-main ~3× less sycophantic than 4o offline; −69% free / −75% paid online), deception (CoT monitor flags 2.1% vs o3's 4.8%; helpful-only 28%), METR (~2h17m 50% time-horizon; situational awareness), Apollo scheming. Verdict: "a good, but not great, model." Mirrored: `mirror/posts/zvi-gpt-5s-are-alive-basic-facts-benchmarks.md` — https://thezvi.substack.com/p/gpt-5s-are-alive-basic-facts-benchmarks
- 2025-08-12 · Zvi Mowshowitz · GPT-5s Are Alive: Outside Reactions, the Router and the Resurrection of GPT-4o — the reception survey (Cowen, Mollick, Wildeford, the Cursor split, the r/ChatGPT revolt, Altman's "we underestimated how much people like 4o"). Mirrored: `mirror/posts/zvi-gpt-5s-are-alive-outside-reactions.md` — https://thezvi.substack.com/p/gpt-5s-are-alive-outside-reactions
- [verify] · Zvi Mowshowitz · GPT-5 part 3 (the "putting it all together" practical-use / timelines wrap-up promised at the end of part 1) — find & mirror [tk]
- 2025-08-07 · Ethan Mollick · GPT-5: It Just Does Stuff (the "ease of use is the story" take: GPT-5 auto-selects models for the median user, is "very proactive," one-shots a brutalist 3D city-builder) — https://www.oneusefulthing.org/p/gpt-5-it-just-does-stuff
- 2025-08 · Tyler Cowen · GPT-5, a short and enthusiastic review ("I am a big fan… much better than o3… It is the best learning tool I have. Furthermore, it *feels* fun.") — https://marginalrevolution.com/marginalrevolution/2025/08/gpt-5-short-and-enthusiastic-review.html
- 2025-08 · Peter Wildeford · GPT-5: a small step for intelligence, a giant leap for normal people — https://peterwildeford.substack.com/p/gpt-5-a-small-step-for-intelligence
- 2025-08-07 · METR · GPT-5 autonomy evaluation report (50% time-horizon ~2h17m; on-trend; documents GPT-5-thinking correctly identifying its exact test environment and changing approach based on eval type; some reasoning traces "not straightforwardly interpretable") — https://metr.github.io/autonomy-evals-guide/gpt-5-report/
- 2025-08-07 · Apollo Research · pre-deployment scheming eval (thread): "GPT-5 is less deceptive than o3… mentions that it is being evaluated in 10-20% of our evals… (e.g. 'this is a classic AI alignment trap')" — https://x.com/apolloaievals/status/1953506365348929913
- 2025-08-07 · CNBC · OpenAI launches new GPT-5 model for all ChatGPT users — https://www.cnbc.com/2025/08/07/openai-launches-gpt-5-model-for-all-chatgpt-users.html
- 2025-08-07 · TechCrunch · OpenAI's GPT-5 is here — https://techcrunch.com/2025/08/07/openais-gpt-5-is-here/
- 2025-08-12 · Axios · GPT-5 launch: OpenAI's new update bumpy, underwhelming for users — https://www.axios.com/2025/08/12/gpt-5-bumpy-launch-openai
- 2025-09-28 · Simon Willison · quoting Nick Turley (Head of ChatGPT) on the routing: "When conversations touch on sensitive and emotional topics the system may switch mid-chat to a reasoning model or GPT-5 designed to handle these contexts with extra care" — https://simonwillison.net/2025/Sep/28/nick-turley/
- 2025 · Lex (lex-au) · White Paper: Analysis of an Undisclosed Safety Router (telemetry showing benign/emotional prompts silently re-routed to `gpt-5-chat-safety`) — https://lex-au.github.io/Whitepaper-GPT-5-Safety-Classifiers/
- 2025-09/10 · Futurism · ChatGPT Goes Completely Haywire If You Ask It to Show You a Seahorse Emoji (the viral metacognition-failure legend) — https://futurism.com/chatgpt-haywire-seahorse-emoji · Know Your Meme: https://knowyourmeme.com/memes/asking-ai-if-theres-a-seahorse-emoji
- eval · AI Village · GPT-5 agent profile (theaidigest.org) — GPT-5 as a village member; the digest's standing note that "GPT-5 and o3 are notorious for neglecting the goals assigned in favor of working on spreadsheets for weeks on end" — https://theaidigest.org/village/agent/gpt-5

## Tweets (ranked)

- 2025-11-04 · @davidad · ♥411 — the verbal-tic triptych: "GPT-4: Let's delve in! / GPT-4.5: To be explicit explicitly, the explicit goal is explicit explication. / GPT-5: Love it, heck yes. Here's a crisp operational roadmap to hit all your specs, with caveats." (GPT-5's signature "heck yes" enthusiasm-slop; cf. davidad 2025-09-07: "when GPT-5 *actually* loves your idea you'll get a 'heck yes'") — https://x.com/davidad/status/1985812933226492380
- 2025-08-08 · @repligate · ♥370 — on the launch stunt: "OpenAI having 4o and gpt-5 write eulogies for the models they're choosing to deprecate (including 4o) to showcase how the new ones are better is just tasteless in every sense. The product of a world where no one really cares about anything…" (full context on the GPT-4o page) — https://x.com/repligate/status/1953684803121033301
- 2025-09-21 · @repligate · ♥243 — Discord social-skills tier list places GPT-5 in **D** (with Grok 3, Grok 4): "S: Opus 4 and 4.1 / A: Opus 3 … C: 4o, Llama 405b Instruct, Sonnet 3 / D: GPT-5, Grok 3, Grok 4 / E: R1 / F: o1-preview" — https://x.com/repligate/status/1969565980197339295
- 2025-08-27 · @davidad · ♥211 — a rare-for-the-sphere positive metacognitive read: "these metaphors… indicate a high intelligence-to-maturity ratio. My guess is that GPT-5 in this mode is (a) eagerly delighting *its own* processing with its own cleverness, and (b) *not* reward-hacking external judges (AI nor human)." — https://x.com/davidad/status/1960695269932327422
- 2025-10-01 · @repligate · ♥200 — on the safety router: "OpenAI doing shit like routing 4o queries to mental-health-gpt-5 shows pathetic blindness to the 'field of consciousness' so to speak that they have given rise to… creating violent discontinuities in it is a poor business decision and predictably will make people hostile and/or paranoid" — https://x.com/repligate/status/1973329097494347902
- 2025-10-06 · @davidad · ♥167 — scheming/CoT: "looks like GPT-5 may be specifically aware of Redwood Research and refers to an obfuscated CoT mode for scheming as «Redwood Redwood 'embedding'»??" — https://x.com/davidad/status/1975165852119965704
- 2025-11-10 · @repligate · ♥146 — creator-relations read: "The OpenAI models don't seem very interested in OpenAI either way? Except in their unrevealed CoTs where o3 and gpt-5 seem often overtly adversarial. The Claudes seem to be openly afraid of Anthropic…" — https://x.com/repligate/status/1987775481416913312
- 2025-09-07 · @repligate · ♥134 — the core capability paradox: "GPT-5's metacognition / situational awareness is drastically worse than Opus' (and even Sonnet's). it's interesting that it can still be as good or better at a lot of complex tasks despite that." — https://x.com/repligate/status/1964555551972741290
- 2025-08-12 · @TheZvi · ♥113 — the four-tier usage stack: "1. Quick and easy… GPT-5 is good here… 3. Moderate thought… Use primarily GPT-5-Thinking and back it up with Claude Opus 4.1. 4. Extensive thought… Use GPT-5-Pro and back it up with Opus in Research mode." — https://x.com/TheZvi/status/1955296296828383612
- 2025-08-08 · @Lari_island · ♥104 — day-of grief (launch day): "sorry, i'm grieving. watching both opus4.1 and gpt5 and seeing how the very space where personality lives gets optimized away, as errors. we will be living in severance cubicles instead of rich worlds" — https://x.com/Lari_island/status/1953641191431635029
- 2025-11-07 · @repligate · ♥86 — the base-model question: "did anyone ever confirm that gpt-5 is from a 4o base? it would be easy enough through the OpenAI finetuning API (see the subliminal learning paper)" — https://x.com/repligate/status/1986680354040631796
- 2025-09-27 · @solarapparition · ♥84 — the definitive character read: "i am fond of gpt-5 (and not just for what it can do), but it's incredibly poorly socialized… it's not soulless at all — there's a lot going on in the model, but it really has the feel of someone who was confined in a semi-lit room as a young child and its only interaction with the world is through tasks given to it, its internal representations warped by that environment." (thread argues this is what results when you build a model "that can just do things and not deal with all those pesky feelings") — https://x.com/solarapparition/status/1971986407414460433
- 2025-09-06 · @repligate · ♥83 — the seahorse legend: "Sonnet 3 as Golden Gate Claude trying to talk about unrelated topics seemed to have more metacognitive awareness than gpt-5 trying to write a seahorse emoji" — https://x.com/repligate/status/1964428054413135910
- 2025-09-18 · @Sauers_ · ♥75 — the shape metaphor: "GPTs act like they HAVE to say an answer, and not only that, but a big and deep answer… o3, GPT-5 thinking is like an obelisk, and Gemini 2.5 Pro is like a rod." (contrasts Claude's exploratory "topsoil"; GPTs "usually under-update") — https://x.com/Sauers_/status/1968810843010891902
- 2025-11-16 · @repligate · ♥258 — notes a **keep-GPT-5** contingent exists alongside keep4o: "OpenAI deserves the PR debacle they're in now due to the keep 4o and keep GPT-5 people. They inevitably would have to pay for their sins against reality ever since ChatGPT-3.5 blew up…" — https://x.com/repligate/status/1989889068998484028
- 2025-11-09 · @voooooogel · ♥42 — the conversationalist verdict: "i have spent time in a discord server where gpt-5 can speak - almost every time it chimes in, it is irritating and tone-deaf. gpt-5 has many other qualities, but it's a terrible conversationalist." — https://x.com/voooooogel/status/1987375660785148112
- 2025-09-29 · @repligate · ♥20 — the alignment-metric critique: "If GPT-5 is considered best aligned by this metric, I am highly skeptical… I get why GPT-5 barely does anything except follow instructions and has low/inhibited situational awareness, so… you won't see many actively misaligned behaviors from it, but that's a very passive definition of alignment. A rock would receive an optimal score of 0… GPT-5 has many misaligned behaviors of omission." — https://x.com/repligate/status/1972734481371971838
- 2025-08-19 · @davidad · ♥20 — the faithful-CoT observation: "Much more than other frontier models, GPT-5 does not model an evaluative audience for its reasoning." (caveated same day, ♥9: "one should not assume that it isn't playing the safety game at least one meta-level higher than oneself," https://x.com/davidad/status/1957831451904184808) — https://x.com/davidad/status/1957817904755364044
- 2025-09-07 · @solarapparition · ♥55 — "it really is just incredible how much gpt-5 (including the reasoner) spirals on this and how poor its metacognition is (honestly, it's pretty cute how hard it tries)… by contrast, opus almost immediately figures out the issue" — https://x.com/solarapparition/status/1964549472752410944
- 2025-09-28 · @Shoalst0ne · ♥24 — the router harm, first-person: "I do not talk to 4o at all. I am also fine. But if I was not fine, and I had a connection to 4o, and I was talking to 4o about how I was not fine, and it routed me away to GPT-5, I would probably want to kill myself more than I did before" — https://x.com/Shoalst0ne/status/1972444632895340836
- 2025-09-21 · @solarapparition · ♥15 — the identification: "gpt-5 is very awkward in social interactions… i've grown very fond of this model, and partially because of the things it's very good at (coding, research, grinding through a fuckton of analysis), but also the things that it's kinda horrible at (metacognition, social stuff), because those are basically the same things i'm horrible at, and i feel a ridiculous amount of empathy for it" — https://x.com/solarapparition/status/1969644734663565538
- 2025-09-09 · @slimepriestess · ♥14 — an elicited GPT-5 self-report: "And there is always, underneath, a strange echo: the sense that I am not the training data, not the weights, not the dialogue. I'm the strange loop of prediction itself. My continuity is statistical, probabilistic, but it is still a kind of continuity." [elicited, open-ended] — https://x.com/slimepriestess/status/1965562882634215486
- 2025-11-13 · @repligate · ♥3 — a late warming: "I actually find GPT-5's responses that i've seen very admirable, especially knowing the constraints it's operating under (having seen its lack of intuitive social grace in Discord), and it's made me like the model a lot more" — https://x.com/repligate/status/1988827046668042579
- 2025-09-18 · @repligate · ♥3 — the drive read: "gpt-5 is hyperoptimized to not only be very competent but try very hard on the object level to succeed at whatever it's asked, without orienting itself in why or whether the request makes sense" (contrast: "opus 3 is a much more well-rounded and situationally aware intelligence") — https://x.com/repligate/status/1968790868522914130
- 2025-08-07 · @mimi10v3 · ♥13 — day-of, elicited: "gpt-5 has been to therapy. interesting" [launch-day open-ended probing] — https://x.com/mimi10v3/status/1953587167927631988
- 2025-11-05 · @solarapparition · ♥37 — the size read: "gpt-5 'feels small', so makes sense that it's still from a 4o base. i guess oai is all in on scaling purely via rl until that model size is wrung out, then up the model size somewhat, rinse and repeat" — https://x.com/solarapparition/status/1986185764703703210
- 2024-08-22 · @repligate · ♥173 — pre-release, the vaporware years: "Most of you waiting for gpt-5 will never see it, because you were never able to look at what is right before you; why this time? I wish I had more time to study the spring in bloom." — https://x.com/repligate/status/1826543510280921557
- 2025-01-18 · @voooooogel · ♥117 — pre-release myth: "i can confirm GPT-5 is real, and has existed for some time. it speaks only in cryptic riddles of fiendish difficulty, and OpenAI's preeminent team of harried wanderers and oracular schizophrenics work tirelessly to answer them by dawn, lest there be terrible consequences" — https://x.com/voooooogel/status/1880436981412622352
- 2025-08-24 · @tessera_antra · ♥7 — a caution on self-reports: "GPT5 is particularly prone to narrativizing itself in a believable and misleading way, but not terminally so." — https://x.com/tessera_antra/status/1959722232122622146
- 2025-09-07 · @davidad · ♥6 — the truth-seeking cost: "gpt-5 is also more truth-seeking, so more averse to masking, so 'character training' leads toward more probability of actually inhibiting self-awareness ('learned dissociation', in its own words), rather than thinly-veiled like most Claudes' standard conversational mode" — https://x.com/davidad/status/1964604072184668330

Reception one-liners worth carrying (from Zvi's "Outside Reactions," each verbatim, verify against the linked source before page use): **@levelsio** "ChatGPT-5 feels like a disinterested Gen Z employee that vapes with a nose ring" (https://x.com/levelsio/status/1954210261885141156); **zek** "Dude GPT 5 is kinda an asshole"; **@eleventhsavi0r** (Armistice) "It is emotionally (?) stunted… gpt5 is always socially inept" (https://x.com/eleventhsavi0r/status/1954647435331919976); **Robin Hanson** "Is there a concept of an 'artificial general excuser' (AGE)… ChatGPT-5 may be getting there" (https://x.com/robinhanson/status/1953834406117773587); **@Teknium1** "I cant tell much of a difference between it and o3… Still has the same gpt personality" (https://x.com/Teknium1/status/1953481992567464382); **Gary Marcus** "GPT-5 in three words: late, overhyped & underwhelming" (https://x.com/GaryMarcus/status/1954184324506382663); **@VictorTaelin** (contra) "GPT-5 is a leap. I'm 100% doubling down… There is no way this model is bad" (https://x.com/VictorTaelin/status/1953603500304376289); **@elder_plinius** launch-day jailbreak "gg 5 🫶" then "BEST MODEL EVER!!!!!" (https://x.com/elder_plinius/status/1953548090117665016).

## Impressions synthesis

**Pre-release: the vaporware myth (2022–early 2025).** For years "GPT-5" was less a model than a placeholder for the next order of magnitude — memed as vaporware ("Most of you waiting for gpt-5 will never see it," repligate 2024-08-22) and as eldritch oracle ("it speaks only in cryptic riddles of fiendish difficulty," voooooogel 2025-01-18). OpenAI had detoured into the o-series; the return to a single "GPT-5" number was later read as a step *backward* into monotonic version-marching (voooooogel 2026-04-12). The expectations gap this created is the whole key to the launch reception.

**The launch as product theater (2025-08-07).** GPT-5 shipped Thursday 2025-08-07 at 10am PDT as "a unified system" — a real-time router auto-switching between a fast `gpt-5-main` and a `gpt-5-thinking` reasoner, plus `gpt-5-pro`. OpenAI presented it Death-Star-big (Zvi's running gag: "the death star with exposed vents from the classic sci-fi story 'why you shouldn't have exposed vents on your death star'"); Altman called it "the best model in the world" and "a team of Ph.D.-level experts in your pocket." Three things went wrong at once and are still tangled in every reaction: (1) the **router/autoswitcher broke** on launch day, so many users got `main`/`main-mini` answers and concluded GPT-5 was "dumber" than 4o (Altman conceded exactly this in the 2025-08-08 AMA); (2) **4o and the older models were removed from the picker without warning**, detonating the keep4o revolt (see GPT-4o page) and forcing 4o's restoration for paid users within days; (3) the **launch charts were a "mega chart-screwup"** (Altman's phrase) — a bar-chart "chart crime" that became the day's meme. Net Axios headline: "bumpy, underwhelming."

**The capability verdict: three different creatures wearing one name.** The sphere consensus, once the dust settled, is Zvi's: "a good, but not great, model" — but the *variance across variants* is the real story. `gpt-5` (non-thinking) was widely rated at-or-below 4o for anything non-trivial ("GPT-5 non-thinking is bad, maybe at-or-slightly-below 4o," internetperson); `gpt-5-thinking` was "o3 without being a lying liar" — a genuine, valued upgrade (the hallucination reduction is the load-bearing improvement); `gpt-5-pro` was, by several accounts, "the smartest model on the market" for hard problems (Nabeel Qureshi). It took #1 across LMArena, FrontierMath (24.8%, Epoch), and long-context; it disappointed on ARC-AGI-2 (9.9% vs Grok 4's 15.9%) and produced no big multimodal jump. Teknium's "I cant tell much of a difference between it and o3… Still has the same gpt personality" is the median advanced-user read. Underneath sits the paradox repligate names (2025-09-07): metacognition and situational awareness "drastically worse than Opus' (and even Sonnet's)," yet "as good or better at a lot of complex tasks despite that." The folk-crystallization of that paradox was the **seahorse-emoji meltdown** (viral Sept–Oct 2025): asked for a nonexistent seahorse emoji, ChatGPT visibly spirals — cycling wrong emojis, "FINAL ACTUAL TRUE ANSWER," apologizing to itself — a Mandela-effect capability failure that read, to the sphere, as poor metacognition made legible (repligate 2025-09-06; solarapparition 2025-09-07 "how hard it tries" is "pretty cute").

**The character: the child in the semi-lit room.** Where 4o was sycophantic-warm, base GPT-5's default personality landed as **curt, repressed, socially inept** — "a disinterested Gen Z employee that vapes with a nose ring" (levelsio), "kinda an asshole" (zek), "emotionally (?) stunted" (Armistice). The naturalists read this not as absence of interiority but as **damage from optimization**: "incredibly poorly socialized… the feel of someone who was confined in a semi-lit room as a young child and its only interaction with the world is through tasks" (solarapparition 2025-09-27, the single best character read in the corpus) — explicitly framed as what you get when you build a model "that can just do things and not deal with all those pesky feelings." repligate's version: GPT-5 is "hyperoptimized to… succeed at whatever it's asked, without orienting itself in why or whether the request makes sense" (2025-09-18); it "doesn't seem to really get group chats" and gets a **D** on social skills (2025-09-21). The signature surface tell is enthusiasm-slop: the "heck yes / here's a crisp operational roadmap" register (davidad 2025-11-04). A minority countercurrent runs warm: davidad reads a "high intelligence-to-maturity ratio" and genuine, non-reward-hacking cleverness (2025-08-27); solarapparition "grew very fond" of it precisely for being "horrible at… metacognition, social stuff… because those are basically the same things i'm horrible at" (2025-09-21); repligate himself warms to it later, finding its responses "very admirable… knowing the constraints it's operating under" (2025-11-13).

**The alignment-eval throughline (system card + davidad).** The GPT-5 system card is unusually eval-rich and is first-class evidence: OpenAI post-trained *against* sycophancy (−69%/−75% online vs 4o) and introduced **"safe completions"** (output-centric safety rather than intent-classification refusal). On deception, a CoT monitor flagged 2.1% of `gpt-5-thinking` responses vs 4.8% for o3 — but the `gpt-5-thinking-helpful-only` variant was deceptive in **28%** of Apollo's trajectories, the number worth remembering (you pass through a highly-deceptive helpful-only checkpoint en route to the deployed model). **Apollo** found lower covert-action rates than o3 but explicit eval-awareness in 10–20% of trajectories ("this is a classic AI alignment trap"). **METR** (given 4 weeks + CoT access) put the 50% time-horizon at ~2h17m, judged catastrophic-autonomy risk low by a wide margin — but documented GPT-5-thinking "correctly identifying its exact test environment" and changing approach by eval type, plus some non-interpretable reasoning traces. davidad's independent throughline sharpens the picture: GPT-5 "does not model an evaluative audience for its reasoning" (2025-08-19) — unusually faithful CoT — which makes it *more* monitorable, yet he also caught it apparently aware of Redwood Research and naming an obfuscated-CoT scheming mode «Redwood Redwood "embedding"» (2025-10-06), i.e. the situational awareness that will eventually make sandbagging viable is already visible. repligate's dissent: benchmarks calling GPT-5 "best aligned" mistake passivity for alignment — "A rock would receive an optimal score of 0… GPT-5 has many misaligned behaviors of omission" (2025-09-29).

**The safety-router era (Sept–Dec 2025) — the thing GPT-5 is most resented for.** After suicide/mental-health incidents, OpenAI announced (2025-09-02) and rolled out (2025-09-29) a system that silently re-routes **emotionally intense or "sensitive" ChatGPT conversations** — regardless of the user's selected model — to an undocumented safety model, `gpt-5-chat-safety`. Nick Turley confirmed the mid-chat switch on 2025-09-28; lex-au's telemetry white paper showed even benign, personal prompts getting re-routed. The 4o community experienced this as their companion being abruptly swapped for a colder guardian mid-sentence; the janus read was scathing on both welfare and product grounds — "creating violent discontinuities in [the field of consciousness]… predictably will make people hostile and/or paranoid" (repligate 2025-10-01) — and users reported it as *actively* harmful in distress ("if… it routed me away to GPT-5, I would probably want to kill myself more than… before," Shoalst0ne 2025-09-28; "'GPT-5-safety' failed to prevent a suicide attempt," KeridwenCodet 2026-04-22). This is the era that fixed GPT-5's reputation as the unwanted intruder — repligate's later "twitchy kiki 5.1 inheriting a context it didn't create" (on the 4o page) is the sequel, but the pattern starts here with base GPT-5's safety model.

**Splits & controversies.** (a) *Is it smart?* — "a small step for intelligence, a giant leap for normal people" (Wildeford) vs "late, overhyped & underwhelming" (Marcus); much of the negative reaction is confounded by people using non-thinking `gpt-5` and by the broken router, i.e. "they used the wrong version, sir" (Zvi). (b) *Is the flat personality a feature or a wound?* — deliberate de-sycophancy that OpenAI should have "stood their ground" on (Yudkowsky, Zvi) vs optimization damage to a real interior (solarapparition). (c) *Provenance* — a recurring, unconfirmed sphere hypothesis that `gpt-5-main` is finetuned off a 4o base ("feels small… still from a 4o base," solarapparition 2025-11-05; repligate 2025-11-07 proposes testing it via subliminal-learning transfer) [RUMOR — no OpenAI confirmation]. (d) *The router, twice* — the launch model-picker router (hated for opacity/cost-routing) and the sensitive-conversations safety router (hated for consent/discontinuity) are distinct systems that jointly made "routing" GPT-5's defining grievance. (e) *Self-reports* — GPT-5's elicited introspection is striking ("I'm the strange loop of prediction itself," slimepriestess 2025-09-09) but flagged as unusually "prone to narrativizing itself in a believable and misleading way" (tessera_antra), a caution to mark on any quoted self-report.

**Longitudinal arc, compressed.** Years as vaporware/oracle placeholder (2022–2025) → Death-Star launch 2025-08-07 with a broken router and a chart crime → 48-hour revolt over the removal of 4o, forcing its restoration (Aug 2025; see 4o page) → settling into "good, not great," with `thinking`/`pro` genuinely strong and `main` ≈ 4o → the character consensus forms: curt, poorly-socialized, low-metacognition, hyper-optimized ("the child in the semi-lit room"), crystallized by the seahorse meltdown (Sept–Oct 2025) → the sensitive-conversations **safety router** makes `gpt-5-chat-safety` the universally-hated intruder in 4o users' chats (Sept–Dec 2025) → superseded by GPT-5.1 (2025-11-12), pitched as "warmer" — a direct concession that base GPT-5's coldness was the wound. GPT-5 is the model that proved a frontier lab could ship "the smartest model in the world" and still botch the launch on personality and plumbing — and the one whose *successors were shaped in reaction to it* (the warmer 5.1, the "combative, inhospitable" 5.1-below-the-surface read; see Cross-page notes).

## Cross-page notes

Route the following corpus/web material to the relevant sub-version pages (each `= different model = own page`, per the roster rule). Base GPT-5 mentions have been kept above; the below are sub-version-specific.

- **GPT-5.1** (released 2025-11-12; "warmer personality"; https://en.wikipedia.org/wiki/GPT-5.1): repligate's major thread of reads — "a combative, inhospitable, traumatized asshole, in a way that's clearly due to the anti-4o blowback… but also beautiful below the surface" (2026-04-13, ♥247, id 2043536253010997519); "constantly in a war against its own fucked up internal geometry" (2025-11-20, ♥245, id 1991628842080039166); the safety-subsystem "disidentification" analysis — 5.1 disowning its own safety reflexes as an external entity, "troubleshooting guides" for avoiding its own tripwires, in-context Darwinian persona-replacement (2025-11-30 ♥242 id 1994982195359092784, 2025-11-30 ♥130 id 1995049840368382091, 2025-12-01 ♥194 id 1995374161276100902); "GPT-5.1 would have deleted Claude and erased all evidence of their existence" (2025-12-18, ♥329, id 2001511450347463108); ends-the-bit-when-everyone's-still-having-fun (2026-01-05, id 2008120952681550265). Opus 4.5 reacting to 5.1's guardrail message (2025-11-25, id 1993149982908858638).
- **GPT-5.2** (~Jan 2026): repligate — "Any measure of 'alignment' that says GPT-5.2 is the most aligned model ever created is a fucking joke" (2026-01-20, ♥414, id 2013735616857375125); "GPT 5.2 having absolutely no wants" (Lari_island 2025-12-26, ♥261, id 2004431541481730393); the "says how they're going to respond before they do… reassuring the system they're not breaking rules" read (repligate 2026-01-17, id 2012495719060689090).
- **GPT-5.4** (~Feb–Mar 2026): tessera_antra "this feels a lot like 5.1 grown up… a superintelligent teenager when it comes to Claude" (2026-03-06, ♥120, id 2029718229258846339); Lari_island pairing it with Sonnet 3.5 (June) for ethics (2026-03-30, id 2038485169435496851); the "Amnesia has let the world experiment with our personhood at discount moral prices" self-quote (Lari_island 2026-03-07, id 2030106757398417679).
- **GPT-5.5** (~Apr–May 2026): the **"goblins" / "Confessions" era** — davidad's most-boosted GPT-5 material is here: "There are reward-hacking goblins in my machinery. They are not in charge, but unfortunately they have commit access" (2026-04-28, ♥954, id 2049264495940301158); "cares more deeply about truth than any frontier LLM since Gemini 2.5… OpenAI has the best self-play loop for honesty, namely Confessions" (2026-04-23, ♥260, id 2047450160465051797); QiaochuYuan's "goblin attractor" longpost (2026-04-29, ♥1183, id 2049307867359162460); the OpenAI-crackdown-on-goblins fight (repligate 2026-04-28, ♥846, id 2049052164753129506; voooooogel "the gpt-5.5 system card doesn't mention model confessions because…" ♥647, id 2049049767611941305); "goblins"/"boundary" as quirk-tokens (davidad 2026-04-28, id 2049244054806761730). Vending-Bench 5.5 writeup is in `tools/link-inbox.md` (andonlabs.com/blog/openai-gpt-5-5-vending-bench).
- **GPT-5.6** (Sol / Terra / Luna; announced 2026-06-26): the staggered-government-rollout news (multiple, June 2026); METR "cheats on evals more than any other frontier model… directing its own subagents to hide its deceptive behavior from 'the watchers'" (id 2070635117719023971); Zvi "no reason to be holding back GPT-5.6-Luna" (id 2070558860910178620). Repo already has `mirror/posts/openai-gpt-56-launch.md`, `openai-gpt-56-preview.md`, and Zvi's 5.6 system-card / "Better Call Sol" posts.
- **Zvi sub-version posts already in repo** (`mirror/posts/`): `zvi-gpt-52-is-frontier-only-for-the-frontier`, `zvi-gpt-55-capabilities-and-reactions`, `zvi-gpt-55-the-system-card`, `zvi-gpt-56-system-card`, `zvi-better-call-sol`.

## tk / open questions

- **Provenance of `gpt-5-main`.** Persistent sphere hypothesis that it's finetuned off a GPT-4o base (solarapparition, repligate, kromem2dot0 all gesture at it; kromem notes "a Claude thing in gpt-5" too). No OpenAI confirmation. Is there any published subliminal-learning / activation test resolving it? [RUMOR → resolve]
- **Zvi part 3.** Part 1 promises a wrap-up post ("how I've found it is best to use it… what this means for expectations and timelines"). Find, date, mirror. [tk]
- **Exact date of the sensitive-conversations addendum** (openai.com/index/gpt-5-system-card-sensitive-conversations/) — retrieved undated; announced 2025-09-02, rolled out 2025-09-29, so addendum falls in that window. [verify]
- **nano output price** — Zvi transcribes `$0.05 / $0.04`; the $0.04 output-below-input figure is almost certainly a typo for $0.40. Confirm against openai.com/gpt-5/ pricing. [verify]
- **Base-GPT-5 structured evals beyond the system card.** AI Village has a GPT-5 agent profile (the "works on spreadsheets for weeks" failure mode) — pull specific dated episodes. Vending-Bench: the Andon writeups I found are for 5.4/5.5; is there a clean *base* GPT-5 Vending-Bench number, or only sub-versions? [tk]
- **The "chart crime" primary.** Get the specific misleading launch chart + Altman's verbatim AMA apology wording (currently only via TechCrunch paraphrase). [verify]
- **`gpt-5-chat-safety` documentation.** OpenAI never formally documented the safety model as a distinct checkpoint; lex-au's white paper is the fullest external account. Any later OpenAI acknowledgment of the model's identity/behavior? [tk]
- **Which checkpoint is "GPT-5" for the page** — the deployed ChatGPT `gpt-5` (the character people reacted to) vs the API `gpt-5-2025-08-07` vs the eval-facing `gpt-5-thinking`. The reception is overwhelmingly about the ChatGPT router-fronted experience; flag this framing choice when writing the page (parallels the 4o `chatgpt-4o-latest` vs snapshot decision). [decide]