LIVE INTELLIGENCE · part of the Xentir AI Index

GPT-5.2 vs Grok 4.5

GPT-5.2 · OpenAI, released 2025-12-11
Grok 4.5 · xAI, released 2026-07-08

“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 — GPT-5.2 leads on 2, Grok 4.5 leads on 3.

Benchmark	GPT-5.2	Grok 4.5	Leads
Epoch Capabilities Index (ECI)	153.7	153.6	GPT-5.2
SWE-bench Verified	0.738 (high)	Not measured	Not measured on both
GPQA Diamond	0.914 (xhigh)	0.934 (high)	Grok 4.5
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.961 (high)	0.978 (high)	Grok 4.5
FrontierMath	0.407 (xhigh)	Not measured	Not measured on both
FrontierMath Tier 4	0.188 (xhigh)	Not measured	Not measured on both
SimpleQA Verified	0.389 (xhigh)	0.535 (high)	Grok 4.5
Chess Puzzles	0.490 (xhigh)	0.360 (high)	GPT-5.2

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-5.2 → · Grok 4.5 → · the full AI Model Rankings table