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GPT-5.1-Codex

Multimodalby OpenAI·Model page

OpenAI's reasoning coding model with multimodal input and a 400K-token context for software tasks.

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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....

Author
O
OpenAI
Organization · ✓
openai
Details
Downloads
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AccessClosed Source
Context400K tokens
Input price$1.25 /1M
Output price$10 /1M
CreatedNov 13, 2025
Updated
View on Hugging Face
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GPT-5.1-Codex — AI Model Details | Applied