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OpenAI

Is GPT-5.1-Codex out? Yes, since November 13, 2025

Yes. GPT-5.1-Codex was released on November 13, 2025.

A browser notification for each confirmed release in this family. No account or email.

Have you used it? GPT-5.1-Codex

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Lab
OpenAI
Family
GPT
Release date
Source
OpenAI · GPT-5.1 for developers

What changed

  • context +205 % · Context window compared with gpt-oss-safeguard-20b, same tier in this family. Went from 131k tokens to 400k tokens.
  • price $1.25 / MTok · Prompt price of GPT-5.1-Codex. gpt-oss-safeguard-20b is the previous model of the same tier, but the gap is beyond what a percentage explains.

About GPT-5.1-Codex

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

Next GPT model to watch

Questions

When was GPT-5.1-Codex released?
GPT-5.1-Codex was released on November 13, 2025.
Who makes GPT-5.1-Codex?
GPT-5.1-Codex is made by OpenAI.
What comes after GPT-5.1-Codex?
GPT-5.1-Codex-Max, released on November 19, 2025.