GPT-5.1-Codex-Max
OpenAIGPT-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...
In
$1.25
Out
$10.00
Blended
$3.44
Where to buy this model
1 access routes| Route | In | Out | Blended | vs |
|---|---|---|---|---|
| $1.25 | $10.00 | $3.44 | - |
● official API · ● cloud platform · ● inference host · USD per 1M tokens. Same model, different providers - price and quantization vary.
- Ctx
- 400K
- max output
- 128K
- cache read /1M
- $0.13
- Family
- gpt
- Modalities
- text · image
- Features
- json · reasoning · tools
Live pricing, updated 2026-09-15.