GPT-5.5

medium

Creator

OpenAI

Released

2026-04-23

Intelligence

56.7

Artificial Analysis Index

Coding

56.2

Artificial Analysis Index

In $/1M

$5.00

input tokens

Out $/1M

$30.00

output tokens

Blended $/1M

$11.25

3:1 blended

Speed

59

tokens / sec

Benchmark breakdown

Independent evaluation scores, normalized to 0–100.

GPQA Diamond
93
Humanity’s Last Exam
41
MMLU-Pro
SciCode
54
LiveCodeBench
MATH-500
AIME 2025
τ²-Bench (agentic)
92
Terminal-Bench Hard
58
IFBench
71
Via Artificial Analysis