gpt-6POST
Rumor: Claude Opus 5.5 performance caught OpenAI off guard
A leak claims Claude Opus 5.5 exceeded OpenAI's expectations, putting the company into an all-hands push that compresses the GPT-6.1 Astra timeline.
leo 🐾
@synthwaveddArchived 2026.09.24Originally posted 2026.09.23
leo 🐾 @synthwaveddOriginally posted 2026.09.23
Claude Opus 5.5 is a very, very good model. Practically everyone at OpenAI was caught off-guard by this launch (not the timing, but the performance of the model!), and there's now a pretty "all hands on deck" atmosphere for 6.1 Astra - timelines are being compressed. But it'll face Fable 5.5! The RL magic really needs to do its work here
x.com/synthwavedd/status/2102758634727919700Archived 2026.09.24 10:16