# @Ratter — 2026-09-28

♥3 ↻0 · https://x.com/Ratter/status/2104717131472634312

@__ghostfail They added Sonnet 5.5 to the list of model deprecation/retirement dates and didn't touch Sonnet 4.5, which is *still* listed as “active” despite its retirement date being “no earlier than [tomorrow]”!

tags: author:ratter, deprecation, kind:tweet, model:claude-sonnet-4-5, on:claude-sonnet-5-5, year:2026
cited on: _dossiers/claude-sonnet-5-5.md, claude-sonnet-5-5