OpenAI
GPT-5.1-Codex-Max
openai/gpt-5.1-codex-max
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Cached input
$0.125
per 1M tokens
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
- Released
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input
- text, image
- Output
- text
- Reasoning
- Yes
Price history
No price changes since we started tracking on .
Providers on OpenRouter
1 endpoint serves this model. Uptime is OpenRouter's share of successful requests; prices per 1M tokens.
| Provider | Input | Output | Context window | Uptime 30 min | Uptime 24 h |
|---|---|---|---|---|---|
| Azure | $1.25 | $10.00 | 400K | — | 100% |