Noometry

Model comparison

Gemini 3.1 Pro Preview vs Mistral Small 3

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 31.2 on the Noometry Index. Mistral Small 3 costs 78× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Last verified . 21 shared benchmarks.

Gemini 3.1 Pro Preview Google

56.7

Rank #23 Confirmed

Mistral Small 3 Mistral AI

31.2

Rank #278 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 8 categories and Mistral Small 3 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 18.9.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 95.6% for Gemini 3.1 Pro Preview and 6.7% for Mistral Small 3.
  • Mistral Small 3 is cheaper at $0.05 / $0.08 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
  • Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 33K.
  • Mistral Small 3 has downloadable open weights; the other is API-only.

Side by side

Gemini 3.1 Pro PreviewMistral Small 3
ProviderGoogleMistral AI
Noometry Index56.731.2
Released2026-02-192025-01-30
WeightsProprietaryOpen
Context window1.05M33K
Max output66K16K
Input $ / M tokens$2$0.05
Output $ / M tokens$12$0.08
Results tracked7124

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Category by category

Coding Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 42.5 (#99), Mistral Small 3: 36.5 (#207)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Coding14841246
SWE-bench Verified75.6%—
DeepSWE11.7%—
LMArena WebDev1447—
SciCode58.9%—
GSO22.6%—
WeirdML72.1%—
BigCodeBench Instruct—45.3%
MirrorCode8.9%—
BigCodeBench Complete—50.4%
ALE-Bench1,161—
AlgoTune2.02—

Agentic & Tool Use Not comparable

Gemini 3.1 Pro Preview: 37.7 (#34), Mistral Small 3: —

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
Terminal-Bench80.2%—
APEX-Agents35.3%—
τ²-bench Banking26%—
DeepResearch Bench47.8%—
PostTrainBench22%—
BALROG57%—
ExploitBench26.1%—
GBAEval0.8%—
GDP.pdf17%—
LMArena Search1211—
METR Time Horizons77%—
Vending-Bench 23,774—

Reasoning Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 71.7 (#12), Mistral Small 3: 18.9 (#273)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
Chess Puzzles55%0%
LMArena Hard Prompts14851233
Epoch Capabilities Index154.77127.07
ARC-AGI-277.1%—
SimpleBench79.6%—
NYT Connections (extended)97.4%—
ARC-AGI-198%—
CritPt17.7%—
EnigmaEval36.8%—
Thematic Generalization79.4%—
EBR-Bench14.3%—
Mystery Game Puzzles34%—
DTBench97.1%—
LMCA53.8%—
ForecastBench59—

Math Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 62.1 (#34), Mistral Small 3: 16.3 (#295)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
OTIS Mock AIME 2024-202595.6%6.7%
LMArena Math14851240
FrontierMath (Tiers 1-3)59.6%—
FrontierMath Tier 426.8%—
MathArena Final-Answer Competitions86.5%—
ProofBench26%—
FrontierMath (Feb 2025 set)36.9%—
FrontierMath Tier 4 (v1)16.7%—

Knowledge Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 71.8 (#3), Mistral Small 3: 25.1 (#263)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
GPQA Diamond94.4%47.3%
LMArena Expert14851202
Humanity's Last Exam46.4%—
SimpleQA Verified73.5%—
Confabulations—25.2%
Vectara Hallucination Rate10.4%—

Multimodal Not comparable

Gemini 3.1 Pro Preview: 37.9 (#69), Mistral Small 3: —

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Vision1296—
Blueprint-Bench 226.5%—
Furniture Assembly26.7%—
LMArena Document1444—

Multilingual Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 57.0 (#12), Mistral Small 3: 37.3 (#236)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Non-English14771198
LMArena Chinese15291204
LMArena French14871203
LMArena German14911211
LMArena Japanese14931111
LMArena Korean14551188
LMArena Russian14981216
LMArena Spanish1479—

Instruction Following Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 77.0 (#32), Mistral Small 3: 63.7 (#229)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Instruction Following14661214

Long Context Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 47.4 (#18), Mistral Small 3: 37.8 (#211)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Longer Query14831246
CL-bench20.8%—
CL-bench Life16.9%—

Writing & Preference Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 66.1 (#37), Mistral Small 3: 32.2 (#280)

BenchmarkGemini 3.1 Pro PreviewMistral Small 3
LMArena Text14811234
LMArena Creative Writing14821195
EQ-Bench Creative Writing1491707
LMArena Multi-Turn14881217
EQ-Bench 41142—

Frequently asked questions

Is Gemini 3.1 Pro Preview better than Mistral Small 3?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 31.2 on the Noometry Index. Mistral Small 3 costs 78× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Which is cheaper, Gemini 3.1 Pro Preview or Mistral Small 3?

Mistral Small 3 is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.

Is Gemini 3.1 Pro Preview or Mistral Small 3 better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 36.5 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.1 Pro Preview does, with 1.05M tokens against 33K.

How many benchmarks do Gemini 3.1 Pro Preview and Mistral Small 3 share?

21 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Mistral Small 3 has 24.

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