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GPT 5.2 Codex

openai/gpt-5.2-codex
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GPT 5.2 Codex

openai/gpt-5.2-codex

Coding-focused GPT-5.2 variant with optimized routing.

Added Jan 14, 2026

Context Window

400.0K

Max Output

128.0K

Input Price (Auto)

$1.75/1M

Output Price (Auto)

$14.00/1M

Cache Read (Auto)

$0.18/1M

Capabilities

Benchmarks

Performance metrics and benchmarks

Sourced from Artificial Analysis.

Intelligence Index

26.0

Better than 71% of models compared

Reasoning

GPQA Diamond

Graduate-level scientific reasoning

71.2%

Better than 57% of models compared

HLE

Humanity's Last Exam

7.3%

Better than 56% of models compared

IFBench

Instruction-following benchmark

47.4%

Better than 57% of models compared

T²-Bench Telecom

Conversational AI agents in dual-control scenarios

46.5%

Better than 51% of models compared

AA-LCR

Long context reasoning evaluation

38.0%

Better than 52% of models compared

CritPt

Research-level physics reasoning

8.7%

Coding

SciCode

Python programming for scientific computing

40.4%

Better than 79% of models compared

Terminal-Bench Hard

Agentic coding and terminal use

31.8%

Better than 77% of models compared

LiveCodeBench

Contamination-free coding benchmark

66.9%

Better than 75% of models compared

Math

AIME 2025

American Invitational Mathematics Examination 2025

51.0%

Better than 49% of models compared

Knowledge

MMLU-Pro

Professional and academic subject knowledge

81.4%

Better than 75% of models compared

AA-Omniscience Accuracy

Proportion of correctly answered questions

41.1%

AA-Omniscience Hallucination Rate

Rate of incorrect answers among non-correct responses

73.4%

Last updated Jun 28, 2026

Artificial Analysis

Providers

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