LIVE INTELLIGENCE · part of the Xentir AI Index

GPT-4.1 mini vs o1-preview

GPT-4.1 mini · OpenAI, released 2025-04-14
o1-preview · OpenAI, released 2024-09-12

“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 4 of 9 tracked benchmarks for both models — GPT-4.1 mini leads on 3, o1-preview leads on 1.

Benchmark	GPT-4.1 mini	o1-preview	Leads
Epoch Capabilities Index (ECI)	135.8	135.8	o1-preview
SWE-bench Verified	Not measured	Not measured	Not measured on both
GPQA Diamond	0.658	0.503	GPT-4.1 mini
MATH Level 5	0.873	0.816	GPT-4.1 mini
OTIS Mock AIME 2024-2025	0.447	0.311	GPT-4.1 mini
FrontierMath	0.045	Not measured	Not measured on both
FrontierMath Tier 4	Not measured	Not measured	Not measured on both
SimpleQA Verified	Not measured	Not measured	Not measured on both
Chess Puzzles	Not measured	Not measured	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

GPT-4.1 mini → · o1-preview → · the full AI Model Rankings table