LIVE INTELLIGENCE · part of the Xentir AI Index

Grok-3 mini vs o3-mini

Grok-3 mini · xAI, released 2025-04-09
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 — Grok-3 mini leads on 1, o3-mini leads on 4.

Benchmark	Grok-3 mini	o3-mini	Leads
Epoch Capabilities Index (ECI)	141.0	141.4	o3-mini
SWE-bench Verified	Not measured	Not measured	Not measured on both
GPQA Diamond	0.763 (low)	0.770 (high)	o3-mini
MATH Level 5	0.909 (low)	0.965 (high)	o3-mini
OTIS Mock AIME 2024-2025	0.778 (high)	0.769 (high)	Grok-3 mini
FrontierMath	0.059 (high)	0.124 (high)	o3-mini
FrontierMath Tier 4	Not measured	0.042 (high)	Not measured on both
SimpleQA Verified	0.211 (high)	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

Grok-3 mini → · o3-mini → · the full AI Model Rankings table