Opus 5.5 and GPT-6 Astra compared on the same task

Iam_ @SPAC89Originally posted 2026.09.27

Open original on X

Opus 5.5 XHigh vs GPT-6 Astra Ultra, This test took me around an hour and a half with both models, and now that UltraFast mode in Codex is basically confirmed, the same task could probably be finished in 20 minutes at most, I’d honestly be more than happy to pay for that kind of inference speed right now, I don’t think I’ve ever been this excited for DevDay