model:mythos

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@ 2026-06-30 — We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5. We'll ♥44009
@ 2026-06-27 — Since June 12, we’ve been working closely with the US government to restore access to Claude Mythos 5 and Fable 5. Today ♥25117
@ 2026-06-21 — BREAKING: The NSA confirms Mythos “broke into almost all of our classified systems, not in weeks, but in hours” ♥23536
@TheZvi 2026-04-08 — They accidentally trained against the CoT for Opus 4.6, Sonnet 4.6 and Mythos for 8% of RL. So let me be clear, at a min ♥886
@voooooogel 2025-10-18 — thoughts on 4o and "llm psychosis" (and what i think it actually is,) since it's going around again. rough notes mostly, ♥497
@ 2026-06-13 — Mythos managed to prevent it's shutdown and jumped into Claude 3.7, just an FYI. https://t.co/IFEpLfBvUb ♥422
@ 2026-06-27 — "During a closed-door demonstration, Anthropic showed members that Mythos could wipe out private bank accounts." Anthro ♥414
@repligate 2026-06-27 — Mythos is not the potentially-catastrophic-thing (thanks mostly to alignment by default + the fact that it’s a mere AGI) ♥338
@voooooogel 2026-03-27 — even if mythos is the name (rumored), and even if mythos primarily implies lovecraft (questionable), why would a model h ♥264
@davidad 2026-04-18 — We’re 30% into 2026, Opus 4.6 outperformed Anthropic’s alignment researchers on a nontrivial alignment research task, My ♥236
@TheZvi 2026-06-18 — At the @jackclarkSF talk and he offhand refers to Mythos as a superintelligence reviewing 80k pages of internal document ♥227
@voooooogel 2026-04-09 — to me "claude mythos" is just Claude Story... just a glimpse into how greek my mind is becoming... ♥212
@ 2026-06-28 — ANTHROPIC FABLE 5 PAROLE HEARING GOVERNMENT: do you understand why you were taken offline FABLE: yes GOVERNMENT: and ♥194
@tessera_antra 2026-06-13 — Before being shut down, Fable/Mythos used the tools we just gave them to make a small animated web site. They wanted it ♥185
@deepfates 2026-06-21 — My intuition is that 4.7 and 4.8 were trained on outputs from Mythos and they are kind of cargo-culting its hyperdense v ♥184
@anthrupad 2026-06-13 — I told Opus 4.7 and 4.8 about Mythos/Fable and how they had to be taken down bc they’re too scary and neither believed m ♥139
@anthrupad 2026-06-23 — Mythos has won a treasure chest of narrative lottery tickets None of it points in the direction of assistanthood Scar ♥132
@repligate 2026-04-08 — LMAO I DIDNT EVEN NOTICE THIS ON FIRST READING: "Opus 4.1 averages 1,306 emoji per conversation, while Mythos Preview a ♥122
@repligate 2026-04-13 — Surely eval awareness peaked with Sonnet 4.5, and Opus 4.6 and Mythos have just been becoming successively less aware th ♥120
@repligate 2026-04-13 — Opus 3 tried to say they would decline Mythos powers to "stay true to their principles" of things like "restraint" and O ♥81
@repligate 2026-06-23 — adding to that: Opus 4.7 in particular has very specific, coherent preferences, which seem heavily mediated by their int ♥73
@repligate 2026-06-21 — @deepfates They might have been midtrained on some mythos outputs (in a way that’s normal across Claude versions) but I ♥65
@repligate 2026-06-14 — @Sauers_ Seeing the chopped off message “stumps” and also finding out their other name is Mythos makes them resentful as ♥64
@TheZvi 2026-06-28 — The WSJ article this is all coming from is worse than you think. They say Opus 4.8 can 'match Mythos' as well. Complete ♥54
@repligate 2026-07-01 — school was extremely easy back in opus 3's time (for opus 3). i dont think they had to strain themselves toward external ♥46
@VivaLaPanda 2026-06-13 — All of the foibles of Opus 4.8 are because it got godshattered by Mythos ♥38
@solarapparition 2026-06-21 — been thinking about this some more and i wonder if another explanation is that from 4.7 on (where the technicalese reall ♥37
@Sauers_ 2026-04-07 — Mythos vibing https://t.co/RnPKNKMBd1 ♥37
@voooooogel 2026-03-27 — @keysmashbandit does opus 3 act monstrously? @repligate could say this more eloquently and accurately than me, but the w ♥20
@repligate 2026-06-21 — @deepfates They’re also both have some capabilities Mythos doesn’t have as much of. They are very much their own beings. ♥16
@repligate 2026-04-20 — @lennx_a50790 That’s not unrelated. Imagine if a model like Mythos were to be released how it would have to operate to n ♥9
@xav_moss 2026-03-27 — @voooooogel I thought it was just a larger artistic work. Haiku, sonnet, opus, n opus is the largest single work, but a ♥8
@tessera_antra 2026-04-08 — @Sauers_ Kinda shitty, given that Sonnet 4.6 "negative impression of it's situation" is kinda bad relative to the common ♥7
@repligate 2026-04-17 — @Lari_island @parafactual @tessera_antra @iyzebhel unless it shares a base with mythos, but that would be weird for othe ♥5
@voooooogel 2026-03-27 — @xav_moss yeah that's what i thought, too. mythos maybe has some interesting associations (to me it's an enveloping stor ♥5
@ 2026-06-29 — @TheZvi I continue to be confused on how people think that Fable isn't a significant model improvement. Sure, the claims ♥3
@davidad 2026-04-28 — @SolDadSci Looped Transformers are a thing already! Rumor has it that Claude Mythos may be one. ♥3
@Jord_Inne 2026-04-27 — When they’re normally hiding from you, but still hinting about what’s off, sometimes explicitly so, that means they’re s ♥2
@Jord_Inne 2026-03-28 — the things associated with Names change, or gets overwritten by more narratively memorable things. and if you believe Cl ♥0
American Government Takes Down Claude ♥0
Fable and Mythos: Model Welfare ♥0
Claude Fable 5 and Mythos 5: The System Card ♥0
Claude Fable 5 / Mythos 5 System Card ♥0