Post by Sam Altman on X
Sam Altman@sama
XGPT-5.1 is now available in the API. Pricing is the same as GPT-5.
We are also releasing gpt-5.1-codex and gpt-5.1-codex-mini in the API, specialized for long-running coding tasks.
Prompt caching now lasts up to 24 hours!
Updated evals in our blog post.
5.9K likes648 repliesPosted Nov 13, 2025