LIVE INTELLIGENCE · part of the Xentir AI Index

Gemini 3.1 Pro vs GPT-5.2 Pro (11 Dec 2025)

Name: Gemini 3.1 Pro vs GPT-5.2 Pro (11 Dec 2025) — benchmark results
Creator: Epoch AI
License: https://creativecommons.org/licenses/by/4.0/

Gemini 3.1 Pro · Google DeepMind, released 2026-02-19
GPT-5.2 Pro (11 Dec 2025) · OpenAI, released 2025-12-11

“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

GPT-5.2 Pro (11 Dec 2025) leads on more of the 2 benchmarks where both are measured — GPT-5.2 Pro (11 Dec 2025) on 2. The remaining 7 of 9 tracked benchmarks cannot be compared: 6 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 2 of 9 tracked benchmarks for both models — GPT-5.2 Pro (11 Dec 2025) leads on 2.

Benchmark	Gemini 3.1 Pro	GPT-5.2 Pro (11 Dec 2025)	Leads
Epoch Capabilities Index (ECI)	155.0	155.3	GPT-5.2 Pro (11 Dec 2025)
SWE-bench Verified	0.756 (customtools)	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result
GPQA Diamond	0.944 (high)	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.956	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result
FrontierMath	0.369	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result
FrontierMath Tier 4	0.167	0.313 (webapp)	GPT-5.2 Pro (11 Dec 2025)
SimpleQA Verified	0.735 (high)	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result
Chess Puzzles	0.550	Not measured	Comparison unavailable — GPT-5.2 Pro (11 Dec 2025) has no published result

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

GPT-5.2 Pro (11 Dec 2025) has no published result on Chess Puzzles, FrontierMath, GPQA Diamond, OTIS Mock AIME 2024-2025, SWE-bench Verified, SimpleQA 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	Gemini 3.1 Pro	GPT-5.2 Pro (11 Dec 2025)
Output	—	$168.00

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

Gemini 3.1 Pro → · GPT-5.2 Pro (11 Dec 2025) → · the full AI Model Rankings table