Creator
OpenAI
Released
2025-11-13
Intelligence
34.7
Artificial Analysis Index
Coding
—
Artificial Analysis Index
In $/1M
$1.25
input tokens
Out $/1M
$10.00
output tokens
Blended $/1M
$3.44
3:1 blended
Speed
0
tokens / sec
Profile
License, openness, and modality — the governance layer.
License
Proprietary
non-commercial
Weights
Closed
API only
Modalities
Image · Text
Parameters
—
GPT-5.1 Codex High is optimized for complex coding tasks with enhanced reasoning capabilities. This variant provides deep code analysis, architectural planning, and sophisticated problem-solving for challenging programming tasks.
Capability profile
Category strength across 20 domains, via LLM Stats.
math
100general
100
reasoning
100
Benchmark breakdown
Independent evaluation scores, normalized to 0–100.
GPQA Diamond
86
Humanity’s Last Exam
23
MMLU-Pro
86
SciCode
40
LiveCodeBench
85
MATH-500—
AIME 2025
96
τ²-Bench (agentic)
83
Terminal-Bench Hard
35
IFBench
70