GPT-5.1-CODEX Mini
OpenAI's GPT-5.1-CODEX Mini is a chat model capable of various tasks, including code completion, generation, and review, as well as reasoning and tool use. It excels in mathematical reasoning, as evidenced by its top 25% score on the Math Index, and also performs well on the LiveCodeBench benchmark.
Input
Output
Context
272K
Max Output
128K
Parameters
-
Technical Specifications
Model TypeCode
Context Window272,000 tokens
Max Output Tokens128,000 tokens
ParametersNot available
Release DateNov 13, 2025
Training CutoffSep 30, 2024
Licenseproprietary
Open SourceNo
Input Modalities
ImageText
Output Modalities
Text
Capabilities
Benchmarks
Artificial Analysis
16.9%
HLE
81.3%
GPQA
42.6%
SciCode
82.0%
MMLU Pro
91.7
Math
36.4
Coding
83.6%
LiveCodeBench
30.6
Intelligence
210
Speed (tok/s)
2.7
TTFA (s)
2.7
TTFT (s)
Resources & Links
proprietary, Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: Jun 24, 2026
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