LIVE INTELLIGENCE · part of the Xentir AI Index

Claude 3.7 Sonnet vs o3-mini

Claude 3.7 Sonnet · Anthropic, released 2025-02-24
o3-mini · OpenAI, released 2025-01-31

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-07-26 · Methodology · Data Sources

Head-to-head

Measured on 5 of 9 tracked benchmarks for both models — Claude 3.7 Sonnet leads on 2, o3-mini leads on 3.

Benchmark	Claude 3.7 Sonnet	o3-mini	Leads
Epoch Capabilities Index (ECI)	141.7	141.4	Claude 3.7 Sonnet
SWE-bench Verified	0.610	Not measured	Not measured on both
GPQA Diamond	0.785 (64k)	0.770 (high)	Claude 3.7 Sonnet
MATH Level 5	0.912 (64k)	0.965 (high)	o3-mini
OTIS Mock AIME 2024-2025	0.578 (64k)	0.769 (high)	o3-mini
FrontierMath	0.041 (16k)	0.124 (high)	o3-mini
FrontierMath Tier 4	Not measured	0.042 (high)	Not measured on both
SimpleQA Verified	Not measured	Not measured	Not measured on both
Chess Puzzles	Not measured	0.170 (high)	Not measured on both

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality. A model with no row here for a benchmark has not been measured on it — that is left blank, never estimated.

Full profiles

Claude 3.7 Sonnet → · o3-mini → · the full AI Model Rankings table