GPT-5.1-Codex-Max
Rank #266
openai
openai/gpt-5.1-codex-max-20251204
Usage data date 2026-07-26 · updated daily
Usage and specs
Daily rank#266
Daily tokens434.5M
Daily requests23.1K
Daily change
+26.7%
Context window400K
Released
What is 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 workflows spanning software engineering, mathematics, and research. GPT-5.1-Codex-Max delivers faster performance, improved reasoning, and higher token efficiency across the development lifecycle.
GPT-5.1-Codex-Max capabilities
Input: Text、Image Output: Text
GPT-5.1-Codex-Max API pricing
Input · per 1M tokens$1.25
Output · per 1M tokens$10.00
List prices in USD; see each provider’s site for current terms.
Tools built on this model
ChatGPT
Best for people or teams exploring chat and assistance; not suitable for high-risk decisions without human review and current official terms.
GPT-4
Best for people or teams exploring model training and use; not suitable for high-risk decisions without human review and current official terms.
DALL·E 3
Best for people or teams exploring model training and use; not suitable for high-risk decisions without human review and current official terms.
Codex
Best for professional developers and engineering teams that want to delegate development, refactoring, and ops work to an AI agent; not for non-programmers or users who only need simple code completion.
StudyCorgi ChatGPT Detector
Suitable for students and teachers who need a free, fast way to screen essays and assignments; not suitable for users who must scan very long documents or batches of files.