gpt-5.1-codex

Display Name:GPT-5.1 CodeX
OpenAI
OpenAI
multimodalReleased on Nov 13 12:00 AM
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GPT-5.1-Codex is a version of GPT-5 optimized for agentic coding tasks in Codex or similar environments. It's available in the Responses API only and the underlying model snapshot will be regularly updated. If you want to learn more about prompting GPT-5-Codex, refer to our dedicated guide

Specifications

Context400,000
Max Output128,000
Inputtext, image
Outputtext, json

Performance (7-day Average)

Uptime
TPS
RURT

Pricing

Input$1.25×1.1/MTokens
Output$10.00×1.1/MTokens
Cached Input$0.13×1.1/MTokens

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