GPT-5.3 Codex

xhigh

Creator

OpenAI

Released

2026-02-05

Intelligence

53.6

Artificial Analysis Index

Coding

53.1

Artificial Analysis Index

In $/1M

$1.75

input tokens

Out $/1M

$14.00

output tokens

Blended $/1M

$4.81

3:1 blended

Speed

97

tokens / sec

Benchmark breakdown

Independent evaluation scores, normalized to 0–100.

GPQA Diamond
92
Humanity’s Last Exam
40
MMLU-Pro
SciCode
53
LiveCodeBench
MATH-500
AIME 2025
τ²-Bench (agentic)
86
Terminal-Bench Hard
53
IFBench
75
Via Artificial Analysis