LIVE INTELLIGENCE · part of the Xentir AI Index

GPT-4.1 vs GPT-4.5 Preview (Feb 2025)

GPT-4.1 · OpenAI, released 2025-04-14
GPT-4.5 Preview (Feb 2025) · OpenAI, released 2025-02-27

“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 leads on 2, GPT-4.5 Preview (Feb 2025) leads on 2.

Benchmark	GPT-4.1	GPT-4.5 Preview (Feb 2025)	Leads
Epoch Capabilities Index (ECI)	137.5	137.6	GPT-4.5 Preview (Feb 2025)
SWE-bench Verified	0.485	Not measured	Not measured on both
GPQA Diamond	0.669	0.687	GPT-4.5 Preview (Feb 2025)
MATH Level 5	0.830	0.786	GPT-4.1
OTIS Mock AIME 2024-2025	0.383	0.378	GPT-4.1
FrontierMath	0.055	Not measured	Not measured on both
FrontierMath Tier 4	0.000	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 → · GPT-4.5 Preview (Feb 2025) → · the full AI Model Rankings table