OpenAI GPT-5.1 Codex
OpenAI GPT-5.1 Codex is an AI model published by OpenAI, released on 2025-11-14, for Coding model, and 400K context length, with a 85.50 score on LiveCodeBench.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
Model basics
Open source & experience
Official resources
API details
| Type | Condition | Input | Output |
|---|---|---|---|
| Text | - | $1.25/ 1M | $10.00/ 1M |
| Type | TTL | Write | Read |
|---|---|---|---|
| Text | - | $0.0000/ 1M | $0.125/ 1M |
Benchmark Results
GPT-5.1 Codex currently shows benchmark results led by Terminal-Bench (2 / 35, score 56.30), LiveCodeBench (15 / 123, score 85.50), LiveBench (45 / 115, score 68.61). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
Coding and Software Engineer
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Publisher
Model Overview
OpenAI GPT-5.1 Codex is an AI model published by OpenAI, released on 2025-11-14, for Coding model, and 400K context length, with a 85.50 score on LiveCodeBench.
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