GPT-5.1 Codex

high

Creator

OpenAI

Released

2025-11-13

Intelligence

43.1

Artificial Analysis Index

Coding

36.6

Artificial Analysis Index

In $/1M

$1.25

input tokens

Out $/1M

$10.00

output tokens

Blended $/1M

$3.44

3:1 blended

Speed

174

tokens / sec

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
Via Artificial Analysis