Claude Opus 5.5 reportedly caught OpenAI off guard, compressing timelines for 6.1 Astra
basedjensen · x · 2026-09-23
Unverified rumor from @synthwavedd claims Claude Opus 5.5 is a very strong model that caught nearly everyone at OpenAI off guard — not the timing, but the performance. OpenAI is reportedly now in an all-hands-on-deck mode compressing timelines for its next model, 6.1 Astra, which will face competition from Fable 5.5. Officially unconfirmed.
Related event: Rumor: Claude Opus 5.5 Stuns OpenAI, GPT-6.1 Timeline Squeezed(3 posts)→
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