Noometry

Model comparison

Gemini 2.5 Flash vs Mistral Small

Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 33.4 on the Noometry Index. Mistral Small costs 3.2× less per token, which makes it the better buy when Gemini 2.5 Flash's lead doesn't matter for your workload.

Last verified . 26 shared benchmarks.

Gemini 2.5 Flash Google

39.3

Rank #170 Confirmed

Mistral Small Mistral AI

33.4

Rank #243 Confirmed

Summary

  • They share 26 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 9 categories and Mistral Small in 1 category; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Gemini 2.5 Flash leads 39.9 to 16.4.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 73.1% for Gemini 2.5 Flash and 5.8% for Mistral Small.
  • Mistral Small is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.30 / $2.50 for Gemini 2.5 Flash.
  • Gemini 2.5 Flash accepts more context: 1.05M tokens versus 262K.
  • Mistral Small has downloadable open weights; the other is API-only.

Side by side

Gemini 2.5 FlashMistral Small
ProviderGoogleMistral AI
Noometry Index39.333.4
Released2025-04-172024-02-26
WeightsProprietaryOpen
Context window1.05M262K
Max output66K256K
Input $ / M tokens$0.30$0.15
Output $ / M tokens$2.50$0.60
Results tracked5439

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Category by category

Coding Gemini 2.5 Flash leads

Gemini 2.5 Flash: 35.8 (#220), Mistral Small: 34.0 (#247)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Coding14241362
ALE-Bench661.88497.62
SWE-bench Verified (bash only)28.7%—
Aider Polyglot55.1%—
SciCode—26.5%
WeirdML41.9%—
BigCodeBench Instruct—36.1%
LiveBench Coding—36.2%
BigCodeBench Complete—46.6%

Agentic & Tool Use Gemini 2.5 Flash leads

Gemini 2.5 Flash: 30.8 (#74), Mistral Small: 28.1 (#93)

BenchmarkGemini 2.5 FlashMistral Small
Berkeley Function Calling Leaderboard56.2%37.1%
Terminal-Bench17.1%—
TheAgentCompany41.1%—
BALROG33.5%—
Vending-Bench 2548.84—

Reasoning Mistral Small leads

Gemini 2.5 Flash: 18.1 (#286), Mistral Small: 19.8 (#250)

BenchmarkGemini 2.5 FlashMistral Small
Kagi LLM Benchmark56.8%37.8%
CritPt1.1%0%
LMArena Hard Prompts14221335
DTBench76.5%70.9%
LMCA27.5%20.6%
ARC-AGI-22.5%—
SimpleBench41.2%—
ARC-AGI-133.3%—
EnigmaEval2.7%—
LiveBench Reasoning—44.8%
LiveBench Data Analysis—53.7%
Epoch Capabilities Index143.03—
ForecastBench60.6—
LiveBench—44%

Math Gemini 2.5 Flash leads

Gemini 2.5 Flash: 39.9 (#98), Mistral Small: 16.4 (#293)

BenchmarkGemini 2.5 FlashMistral Small
OTIS Mock AIME 2024-202573.1%5.8%
LMArena Math14151341
Omni-MATH38.5%—
LiveBench Math—39.9%
MATH Level 5—46.8%
FrontierMath (Feb 2025 set)4.8%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Gemini 2.5 Flash leads

Gemini 2.5 Flash: 36.4 (#168), Mistral Small: 31.0 (#222)

BenchmarkGemini 2.5 FlashMistral Small
Vectara Hallucination Rate7.8%5.1%
LMArena Expert14261291
GPQA Diamond—47.5%
Humanity's Last Exam12.1%—
MMLU-Pro63.9%—
Confabulations16.8%—
GPQA (HELM)39%—
MMLU—68.7%

Multimodal Gemini 2.5 Flash leads

Gemini 2.5 Flash: 41.8 (#32), Mistral Small: 33.5 (#96)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Vision12531142
GeoBench76%—
VPCT46.2%—
SpatialViz-Bench36.9%—

Multilingual Gemini 2.5 Flash leads

Gemini 2.5 Flash: 52.3 (#88), Mistral Small: 45.5 (#169)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Non-English14091315
LMArena Chinese14501340
LMArena French14331337
LMArena German14181340
LMArena Japanese14051275
LMArena Korean13851259
LMArena Russian14151324
LMArena Spanish14211346

Instruction Following Gemini 2.5 Flash leads

Gemini 2.5 Flash: 75.7 (#54), Mistral Small: 66.4 (#209)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Instruction Following14051310
LiveBench Instruction Following—63.7%
IFEval89.8%—

Long Context Gemini 2.5 Flash leads

Gemini 2.5 Flash: 47.5 (#17), Mistral Small: 40.4 (#156)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Longer Query14191327
Fiction.LiveBench77.8%—

Writing & Preference Gemini 2.5 Flash leads

Gemini 2.5 Flash: 53.8 (#157), Mistral Small: 52.5 (#171)

BenchmarkGemini 2.5 FlashMistral Small
LMArena Text14171338
LMArena Creative Writing14001305
LMArena Multi-Turn14081344
Short-Story Creative Writing76.5%—
EQ-Bench Creative Writing1137—
WildBench81.7%—
LiveBench Language—30.5%

Frequently asked questions

Is Gemini 2.5 Flash better than Mistral Small?

Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 33.4 on the Noometry Index. Mistral Small costs 3.2× less per token, which makes it the better buy when Gemini 2.5 Flash's lead doesn't matter for your workload.

Which is cheaper, Gemini 2.5 Flash or Mistral Small?

Mistral Small is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Gemini 2.5 Flash lists at $0.30 and $2.50.

Is Gemini 2.5 Flash or Mistral Small better for coding?

Gemini 2.5 Flash scores higher on coding benchmarks: 35.8 versus 34.0 in the Noometry coding category.

Which has the bigger context window?

Gemini 2.5 Flash does, with 1.05M tokens against 262K.

How many benchmarks do Gemini 2.5 Flash and Mistral Small share?

26 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Mistral Small has 39.

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