GPT-5.1-Codex-Max
byOpenAI
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...
Specifications
Technical details and pricing.
Benchmarks
10 benchmark scores from Artificial Analysis.
Composite Indices
Intelligence, Coding, Math
Standard Benchmarks
Academic and industry benchmarks
Frequently Asked Questions
What is GPT-5.1-Codex-Max good for?
Use GPT-5.1-Codex-Max for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.
How much does GPT-5.1-Codex-Max cost?
Pricing is based on usage. Current rates are $1.25/1M tokens for input and $10.00/1M tokens for output.
Can I try GPT-5.1-Codex-Max for free?
Yes. You can start a chat instantly and test the model before deciding on a plan.
Does GPT-5.1-Codex-Max support images or audio?
GPT-5.1-Codex-Max can understand images.
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Benchmarks and pricing are sourced from Artificial Analysis where available. OpenRouter specs are used as a fallback.