AI Models / Compare
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
- Creator
- OpenAI
- Lifecycle
- Active
- Context
- 400.0K
- Max output
- 128.0K
- Released
- Dec 4, 2025
- Status
- up
- Input
- $1.25 / 1M tokens
- Output
- $10.00 / 1M tokens
- Cached read
- $0.13 / 1M tokens
- Cached write
- — / 1M tokens
- Batch discount
- —%
- Source
- OpenRouter
- Verified
- Apr 5, 2026 (High)
Capabilities
- Modalities
- textimage→text
- Capabilities
- reasoningimageInputpromptCachingfunctionCallingstructuredOutputs
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