Verdict
Gemini 3.1 Pro leads 17–0 across 17 shared benchmarks.
Gemini 3.1 Pro 17 · Gemini 3 Flash 0 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: Gemini 3.1 Pro leads 4–0 across 4 shared reasoning benchmarks (largest gap: SimpleBench, 75.52 vs 53.32 — single evaluator).
Game Playing: Gemini 3.1 Pro leads 2–0 across 2 shared game playing benchmarks (largest gap: Chess Puzzles, 52.65 vs 36.87 — single evaluator).
Math: Gemini 3.1 Pro leads 2–0 across 2 shared math benchmarks (largest gap: FrontierMath-Tier-4-v2-Private, 26.83 vs 17.07 — single evaluator).
Unknown: Gemini 3.1 Pro leads 2–0 across 2 shared unknown benchmarks (largest gap: ProofBench, 26 vs 15 — single evaluator).
Vendor claims — compare against the measured scores above. A claim is what a developer says about its own model, not an independent measurement.
Agentic / Tool Use
“Gemini 3.1 Pro was evaluated across a range of benchmarks, including reasoning, multimodal capabilities, agentic tool use, multi-lingual performance, and long-context.”
Multimodal
“a suite of highly capable, natively multimodal reasoning models”
Reasoning
“Gemini 3.1 Pro is Google's most advanced model for complex tasks.”
No vendor claims on file for Gemini 3 Flash.
Gemini 3.1 Pro leads 17–0 across 17 shared benchmarks. Gemini 3.1 Pro leads 17 benchmarks and Gemini 3 Flash leads 0. Higher isn't always better — see the integrity caveats on each benchmark.
Gemini 3.1 Pro and Gemini 3 Flash have 17 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
Gemini 3.1 Pro leads reasoning 4–0. Gemini 3.1 Pro leads game playing 2–0.