SF·SIX / MODEL PROFILE
OpenAI GPT-5.1-Codex-Max
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...
OpenAI GPT-5.1-Codex-Max costs $1.25 per 1M input tokens and $10.00 per 1M output tokens at the standard tier, the lowest default-region price among the 1 provider SF·SIX tracks, from Azure. Cached input reads cost $0.125 per 1M tokens. Updated ; prices checked .
- Developer
- OpenAI
- Input modalities
- text, image
- Output modalities
- text
- Context tokens
- 400,000
- Latest price observation
- 2026-10-17
- Lowest paired standard token quote
- $1.25 input / $10.00 output per 1M tokens
Dated price and provider records
| Provider and channel | Input | Output or native rate | Unit and status | Source and observation |
|---|---|---|---|---|
| AzureOpenRouter | $1.25 | $10.00 | 1M tokenspriced · USD | OpenRouter2026-10-17 |
These are dated, non-executable observations. Verify the exact endpoint, price and terms with the source before use. Unknown values are not free.