Noometry

Model comparison

Gemini 3 Flash Preview vs Mistral Small 3.1

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 31.7 on the Noometry Index. Mistral Small 3.1 costs 2.8× less per token, which makes it the better buy when Gemini 3 Flash Preview's lead doesn't matter for your workload.

Last verified . 22 shared benchmarks.

Gemini 3 Flash Preview Google

52.3

Rank #40 Confirmed

Mistral Small 3.1 Mistral AI

31.7

Rank #269 Confirmed

Summary

  • They share 22 benchmarks with published results for both. Gemini 3 Flash Preview scores higher in 9 categories and Mistral Small 3.1 in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Gemini 3 Flash Preview leads 51.7 to 14.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 95.6% for Gemini 3 Flash Preview and 3.9% for Mistral Small 3.1.
  • Mistral Small 3.1 is cheaper at $0.35 / $0.56 per million input/output tokens, against $0.50 / $3 for Gemini 3 Flash Preview.
  • Gemini 3 Flash Preview accepts more context: 1.05M tokens versus 128K.
  • Mistral Small 3.1 has downloadable open weights; the other is API-only.

Side by side

Gemini 3 Flash PreviewMistral Small 3.1
ProviderGoogleMistral AI
Noometry Index52.331.7
Released2025-12-172025-03-17
WeightsProprietaryOpen
Context window1.05M128K
Max output66K102K
Input $ / M tokens$0.50$0.35
Output $ / M tokens$3$0.56
Results tracked5928

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Category by category

Coding Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 50.9 (#42), Mistral Small 3.1: 38.3 (#179)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Coding14601309
SWE-bench Verified75.4%—
SWE-bench Verified (bash only)75.8%—
LMArena WebDev1439—
SWE-bench Multilingual72.7%—
GSO9.8%—
WeirdML61.6%—
ALE-Bench1,367—

Agentic & Tool Use Not comparable

Gemini 3 Flash Preview: 38.7 (#29), Mistral Small 3.1: —

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
Terminal-Bench64.3%—
τ²-bench Airline82.5%—
τ²-bench Banking27.3%—
τ²-bench Retail76.8%—
τ²-bench Telecom91.2%—
DeepResearch Bench49.8%—
BALROG48.1%—
GDP.pdf10%—
LMArena Search1198—
Vending-Bench 23,635—

Reasoning Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 49.2 (#37), Mistral Small 3.1: 19.7 (#254)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
Chess Puzzles40%1%
LMArena Hard Prompts14651278
Epoch Capabilities Index151.8127.48
ARC-AGI-233.6%—
SimpleBench61.1%—
NYT Connections (extended)83.1%—
ARC-AGI-184.7%—
Mystery Game Puzzles26%—
DTBench89.1%—
LMCA43.1%—
ForecastBench58.5—

Math Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 51.7 (#55), Mistral Small 3.1: 14.7 (#301)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
OTIS Mock AIME 2024-202595.6%3.9%
LMArena Math14731262
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 417.1%—
MathArena Final-Answer Competitions67.6%—
ProofBench15%—
Omni-MATH—24.8%
FrontierMath (Feb 2025 set)35.6%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 58.8 (#33), Mistral Small 3.1: 22.6 (#271)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
GPQA Diamond89.4%41.9%
LMArena Expert14621257
SimpleQA Verified66.8%—
MMLU-Pro—61%
Vectara Hallucination Rate13.5%—
GPQA (HELM)—39.2%

Multimodal Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 45.5 (#16), Mistral Small 3.1: 33.2 (#99)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Vision12851136
GeoBench88%—
VPCT72.6%—
Blueprint-Bench 20%—
LMArena Document1413—

Multilingual Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 55.7 (#27), Mistral Small 3.1: 41.2 (#209)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Non-English14581255
LMArena Chinese15111253
LMArena French14771273
LMArena German14971266
LMArena Japanese14891208
LMArena Korean14431206
LMArena Russian14801263
LMArena Spanish14691283

Instruction Following Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 75.7 (#56), Mistral Small 3.1: 63.6 (#230)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Instruction Following14371264
IFEval—75%

Long Context Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 44.4 (#67), Mistral Small 3.1: 39.5 (#178)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Longer Query14521299

Writing & Preference Gemini 3 Flash Preview leads

Gemini 3 Flash Preview: 65.5 (#45), Mistral Small 3.1: 37.0 (#259)

BenchmarkGemini 3 Flash PreviewMistral Small 3.1
LMArena Text14661277
LMArena Creative Writing14571253
LMArena Multi-Turn14711270
EQ-Bench Creative Writing—761
WildBench—78.8%

Frequently asked questions

Is Gemini 3 Flash Preview better than Mistral Small 3.1?

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 31.7 on the Noometry Index. Mistral Small 3.1 costs 2.8× less per token, which makes it the better buy when Gemini 3 Flash Preview's lead doesn't matter for your workload.

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

Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Gemini 3 Flash Preview lists at $0.50 and $3.

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

Gemini 3 Flash Preview scores higher on coding benchmarks: 50.9 versus 38.3 in the Noometry coding category.

Which has the bigger context window?

Gemini 3 Flash Preview does, with 1.05M tokens against 128K.

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

22 benchmarks have published results for both models. Gemini 3 Flash Preview has 59 scored results on Noometry and Mistral Small 3.1 has 28.

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