GPT-5.1-Codex-Max
Benchmarks, price, context and versions
Also searched as
GPT 5.1 Codex Max
Direct answer: GPT-5.1-Codex-Max is a model from OpenAI. On OpenRouter, US$ 1.25 per 1 million input tokens and US$ 10.00 per 1 million output tokens.
✓ Good for
- Not enough data in the open sources this section uses to build this block.
✕ Not the best for
- Not enough data in the open sources this section uses to build this block.
This block follows a rule of this section, using source data: if the model is in the top 25% of the metric, the item goes under "Good for"; if it is in the bottom half, it goes under "Not the best for". The middle band appears in neither. Price and context use OpenRouter; scores use Epoch AI or OpenRouter Benchmarks, in the latest version we checked.
Benchmarks
Key specs
Version history
- OpenAI: GPT-5.1-Codex-Max OpenRouter, listed on OpenRouter
Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch.
FAQ
What is GPT-5.1-Codex-Max?
GPT-5.1-Codex-Max is a model from OpenAI, with undisclosed weights, used for text, agents, code.
How much does GPT-5.1-Codex-Max cost?
On OpenRouter, US$ 1.25 per 1 million input tokens and US$ 10.00 per 1 million output tokens.
What is the context window of GPT-5.1-Codex-Max?
400,000 tokens, per OpenRouter.
Is GPT-5.1-Codex-Max open source?
No data in open sources.
Is GPT-5.1-Codex-Max good for coding?
No data: there is no SWE-bench Verified measurement for it in open sources.
Who made GPT-5.1-Codex-Max?
It was made by OpenAI, a lab from the US.
provisional data Questions under review: Semrush had no API balance during collection. Answers use source data only.
Models from OpenAI
Sources
- OpenRouter, dados públicos da API; exports de benchmarks e rankings em CC BY 4.0, latest version we checked.
Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch. Family and version were grouped by rule from the name.