GPT-5-CODEX
OpenAI's GPT-5-CODEX 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, with a top 10% score on the Math Index, and also performs well in coding tasks, as evidenced by its top 25% scores on the Coding Index and LiveCodeBench.
Input
Output
Context
272K
Max Output
128K
Parameters
-
Technical Specifications
Model TypeCode
Context Window272,000 tokens
Max Output Tokens128,000 tokens
ParametersNot available
Release DateSep 10, 2025
Training CutoffAug 31, 2025
Licenseproprietary
Open SourceNo
Input Modalities
ImageText
Output Modalities
Text
Capabilities
Benchmarks
Artificial Analysis
25.6%
HLE
69.0%
AA-LCR
83.7%
GPQA
86.8%
Tau2-Bench
98.7%
AIME 2025
74.1%
IFBench
40.9%
SciCode
86.5%
MMLU Pro
98.7
Math
84.0%
LiveCodeBench
36.1
Intelligence
37.9%
Terminal-Bench Hard
Resources & Links
proprietary, Proprietary - API access only
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Data sourced from official provider APIs and documentation
Last updated: Aug 8, 2026
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