GPT-5.1-codex
gpt-5.1-codex
OpenAI · chat · api · seen 9m ago
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Context
400K
Max output
—
Input $/1M
$1.25
Output $/1M
$10.00
Modalities
text
Released
12 Nov 2025
AI summary
● machine-written
OpenAI releases GPT-5.1-Codex for text-based API access
GPT-5.1-Codex is a text-based chat model available via OpenAI API, released November 2025 and now in general availability. It supports a 400K token context window and is priced at $1.25 per million input tokens and $10.00 per million output tokens. The model is designed for coding and professional work through API endpoints.
What's new
- Released November 13, 2025 (known facts show November 12, 2025)
- Supports 400K token context window
- Available via OpenAI API in general availability status
- Priced at $1.25/M input tokens and $10.00/M output tokens
Best for
Coding and professional workTasks requiring extended context (400K tokens)