LIVE INTELLIGENCE · part of the Xentir AI Index

Claude Sonnet 4.6 vs Gemini 3 Pro Preview

Claude Sonnet 4.6 · Anthropic, released 2026-02-17
Gemini 3 Pro Preview · 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 2026-07-26 · Methodology · Data Sources

Head-to-head

Measured on 8 of 9 tracked benchmarks for both models — Claude Sonnet 4.6 leads on 1, Gemini 3 Pro Preview leads on 7.

Benchmark	Claude Sonnet 4.6	Gemini 3 Pro Preview	Leads
Epoch Capabilities Index (ECI)	153.2	153.3	Gemini 3 Pro Preview
SWE-bench Verified	0.752	0.729	Claude Sonnet 4.6
GPQA Diamond	0.874 (32k)	0.926	Gemini 3 Pro Preview
MATH Level 5	Not measured	Not measured	Not measured on both
OTIS Mock AIME 2024-2025	0.858 (32k)	0.914	Gemini 3 Pro Preview
FrontierMath	0.324 (16k)	0.376	Gemini 3 Pro Preview
FrontierMath Tier 4	0.083 (16k)	0.188	Gemini 3 Pro Preview
SimpleQA Verified	0.290 (32k)	0.729	Gemini 3 Pro Preview
Chess Puzzles	0.130 (32k)	0.310	Gemini 3 Pro Preview

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

Claude Sonnet 4.6 → · Gemini 3 Pro Preview → · the full AI Model Rankings table