OpenAI: GPT-5.1-Codex
openai/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....
Modalities
In / Out Price
$1.25 / $10 per 1M
Context
400K
Released
Nov 13, 2025
Knowledge Cutoff
—
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