openai

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....

Input Cost
$1.25
per 1M tokens
Output Cost
$10.00
per 1M tokens
Context Window
400,000
tokens
Compare vs GPT-4o
Developer ID: openai/gpt-5.1-codex

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