OpenRouter
Catalog quote- Input
- $1.25
- Output
- $10.00
- Cached input
- $0.125
openaiListed Dec 4, 2025
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...
Context window400K
Max output128K
Provider endpoints3
Benchmark results0
Measured performance
All leaderboards ↗Benchmark results
No published results in this index yet
Scores appear here when an evaluation matches this exact model.
Access & cost
3 quotesPrices across providers
Your token mix
USD · listed token ratesExperiential
Standard list rate
- Input
- $1.25
- Output
- $10.00
- Cached input
- $0.125
Catalog list rate. Plan allowances and temporary discounts are separate.
- Input
- $1.25
- Output
- $10.00
- Cached input
- $0.125
Max prompt 272000 tokens · Web search $0.01/search
Model specifications
- Developer
- openai
- Modality
- Language
- Context
- 400,000 tokens
- Maximum output
- 128,000 tokens
- Weights
- Not reported
- Provider listed
- Dec 4, 2025
- First discovered
- Oct 16, 2026
Exact identities
- openrouter
openai/gpt-5.1-codex-max - experiential
gpt-5.1-codex-max
Sources
Updated Oct 17, 2026
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