LIVE INTELLIGENCE · part of the Xentir AI Index

Claude Sonnet 5 vs Gemini 3 Pro

Name: Claude Sonnet 5 vs Gemini 3 Pro — benchmark results
Creator: Epoch AI
License: https://creativecommons.org/licenses/by/4.0/

Claude Sonnet 5 · Anthropic, released 2026-06-30
Gemini 3 Pro · Google DeepMind, released 2025-11-18

“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

Claude Sonnet 5 leads on more of the 4 benchmarks where both are measured — Claude Sonnet 5 on 3, Gemini 3 Pro on 1. The remaining 5 of 9 tracked benchmarks cannot be compared: 4 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 4 of 9 tracked benchmarks for both models — Claude Sonnet 5 leads on 3, Gemini 3 Pro leads on 1.

Benchmark	Claude Sonnet 5	Gemini 3 Pro	Leads
Epoch Capabilities Index (ECI)	156.2	153.0	Claude Sonnet 5
SWE-bench Verified	Not measured	0.729	Comparison unavailable — Claude Sonnet 5 has no published result
GPQA Diamond	0.905 (xhigh)	0.926	Gemini 3 Pro
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.947 (xhigh)	0.914	Claude Sonnet 5
FrontierMath	Not measured	0.376	Comparison unavailable — Claude Sonnet 5 has no published result
FrontierMath Tier 4	Not measured	0.188	Comparison unavailable — Claude Sonnet 5 has no published result
SimpleQA Verified	0.337 (max)	Not measured	Comparison unavailable — Gemini 3 Pro has no published result
Chess Puzzles	0.350 (xhigh)	0.310	Claude Sonnet 5

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

Claude Sonnet 5 has no published result on FrontierMath, FrontierMath Tier 4, SWE-bench Verified.
Gemini 3 Pro has no published result on 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	Claude Sonnet 5	Gemini 3 Pro
Output	$10.00 stale	—

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

Claude Sonnet 5 → · Gemini 3 Pro → · the full AI Model Rankings table