Commentator says Opus 5.5 stole the show from OpenAI DevDay

Emily @IamEmily2050Originally posted 2026.09.24

Open original on X

Anthropic nuked OpenAI DevDay with Opus 5.5. Everyone attending will be talking about how much better Opus 5.5 is than Astra, how much more you can use it for the same price, and how Fable 5.5 will be even better. Of course, you can't trust Anthropic; also, they might nerf Opus 5.5 after OpenAI DevDay, and Fable is so expensive.

This post quotes another post: “OpenAI DevDay preview: Astra enables new ways of working”