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OpenAI: GPT-5.1-Codex-Max

OpenAI: GPT-5.1-Codex-Max is openai's model. It is not yet scored on the meo first-party benchmark; aggregated third-party results and OpenRouter metadata are shown below.

Model details

Lab
openai
Released
2025-12-04
Weights
Context
400K
Max output
128K
Knowledge cutoff
Price in
$1.25/M
Price out
$10.00/M
Modality
text+image->text

Sources: openrouter

FAQ

Is OpenAI: GPT-5.1-Codex-Max open weights?

Open-weights status for OpenAI: GPT-5.1-Codex-Max is not recorded.