o3 is an OpenAI o-series reasoning model release designed to think longer before responding and perform complex reasoning tasks, available in ChatGPT and through the OpenAI API.
Pricing
Model profile · Current snapshot
Input / 1M
$2.00
Output / 1M
$8.00
Blended / 1M
$3.50
Output TPS
104
TTFT (s)
6.98
Model Intelligence
Context window
200,000 tokens
Arena ranking
31
Benchmarkable
Yes
Model level
release
Intelligence Index
31.1
Math Index
88.3
MMLU Pro
0.85
GPQA
0.83
HLE
0.2
LiveCodeBench
0.81
SciCode
0.41
MATH-500
0.99
AIME
0.9
AIME 2025
0.88
IFBench
0.71
LCR
0.73
TerminalBench Hard
0.37
TAU2
0.81
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