GPT-5.1-Codex-Max
openai/gpt-5.1-codex-max- OpenAI
- Family · GPT-5-Codex-Max
- Text · Image → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Not on OSMEXO yet
Spec & list price
Context391K
Max output128K
Input / 1M$1.25
Output / 1M$10.008× input
Usage
Tokens / day8.8M▲ 26% 7d
Usage rank#395
Requests / day949
Tool calls / req0.27
Per request · 30 days
Avg input11.6K0.8× median
Avg output4560.7× median
Cache hit87%1.2× median
Reasoning share76%1.3× median
Tool-call failures0.3%0.1× median
Consumption
Peak 147.8M 29 OctLow 4.4M 31 OctRank today #395
News & trends
News · latest from OpenAI
- GPT-6.1 Terra vs. Claude Opus 5.5: Cheaper and faster in three tests at maxthenewstack.io · 2 Nov
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
Speed
Output speed#166/33466 tok/sabout median
First token#2913.02 s2.9× longer than median
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Moderation
- none
Reasoning effort
- xhigh
- high
- medium · default
- low
Request parameters 10
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_completion_tokens
- seed
- verbosity
When to use
Best for
- Coding agents that edit large codebases
- Long-running software engineering tasks
- Hard debugging with high reasoning effort
- Code review with screenshots
- Tool-calling developer workflows
Think twice for
- General chat and creative writing
- Low-cost bulk classification
- Image generation
- Interactive latency-sensitive replies
Research papers
Want GPT-5.1-Codex-Max on OSMEXO?
Sign in to request it. Requests are reviewed; a request does not guarantee availability.