GPT-5.1-Codex-Max
AvailableGPT-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...
- Context
- 400K tokens
- Max output
- 128K tokens
- Input / 1M tokens
- $1.25per 1M tokens
- Output / 1M tokens
- $10.00per 1M tokens
- Listed since
- Dec 4, 2025
Prices and model data from OpenRouter
Where it's availableProviders · 1
| Provider | Input / 1M tokens | Output / 1M tokens | Status |
|---|---|---|---|
| OpenRouter | $1.25 | $10.00 | Available |
Published benchmark results
From independent leaderboards, each credited to its publisher.