GPT-5.2-CODEX
OpenAI's GPT-5.2-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 coding and general intelligence, with top 25% benchmark scores in the Intelligence Index and Coding Index, and a notably high score in GPQA, ranking in the top 10%.
Input
Output
Context
272K
Max Output
128K
Parameters
-
Technical Specifications
Model TypeCode
Context Window272,000 tokens
Max Output Tokens128,000 tokens
ParametersNot available
Release DateDec 19, 2025
Training CutoffAug 31, 2025
Licenseproprietary
Open SourceNo
Input Modalities
ImageText
Output Modalities
Text
Capabilities
Benchmarks
Artificial Analysis
33.5%
HLE
89.9%
GPQA
54.6%
SciCode
43.0
Coding
40.1
Intelligence
137
Speed (tok/s)
2.6
TTFA (s)
2.6
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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