LIVE INTELLIGENCE · part of the Xentir AI Index

GPT-5.2 (11 Dec 2025) vs Grok 4.5

Name: GPT-5.2 (11 Dec 2025) vs Grok 4.5 — benchmark results
Creator: Epoch AI
License: https://creativecommons.org/licenses/by/4.0/

GPT-5.2 (11 Dec 2025) · 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 2026-09-09 · Methodology · Data Sources

Grok 4.5 leads on more of the 5 benchmarks where both are measured — GPT-5.2 (11 Dec 2025) on 1, Grok 4.5 on 4. The remaining 4 of 9 tracked benchmarks cannot be compared: 3 have a result for only one of the two models, 1 for neither. Nothing on this page is estimated to fill those in.

Head-to-head

Measured on 5 of 9 tracked benchmarks for both models — GPT-5.2 (11 Dec 2025) leads on 1, Grok 4.5 leads on 4.

Benchmark	GPT-5.2 (11 Dec 2025)	Grok 4.5	Leads
Epoch Capabilities Index (ECI)	153.5	153.9	Grok 4.5
SWE-bench Verified	0.738 (high)	Not measured	Comparison unavailable — Grok 4.5 has no published result
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	Comparison unavailable — Grok 4.5 has no published result
FrontierMath Tier 4	0.188 (xhigh)	Not measured	Comparison unavailable — Grok 4.5 has no published result
SimpleQA Verified	0.371 (xhigh)	0.483 (high)	Grok 4.5
Chess Puzzles	0.490 (xhigh)	0.360 (high)	GPT-5.2 (11 Dec 2025)

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.

What remains uncertain

Grok 4.5 has no published result on FrontierMath, FrontierMath Tier 4, SWE-bench Verified.
1 tracked benchmark has no published result for either model.

A missing result means Xentir has not found one published by the source it cites, not that the model performs badly. See Data Sources.

Reference price

Per 1M tokens	GPT-5.2 (11 Dec 2025)	Grok 4.5
Output	$14.00	—

List price as published by the vendor. Xentir does not verify negotiated or enterprise rates, and price is not a measure of capability — see Data Sources.

Full profiles

GPT-5.2 (11 Dec 2025) → · Grok 4.5 → · the full AI Model Rankings table