Noometry

Model comparison

Grok 4 Fast vs Mistral Large 3

Grok 4 Fast and Mistral Large 3 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

Last verified . 20 shared benchmarks.

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Mistral Large 3 Mistral AI

39.1

Rank #176 Confirmed

Summary

  • They share 20 benchmarks with published results for both. Grok 4 Fast scores higher in 3 categories and Mistral Large 3 in 5 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 Fast leads 63.2 to 43.1.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 66.1% for Grok 4 Fast and 50.9% for Mistral Large 3.
  • Mistral Large 3 has downloadable open weights; the other is API-only.

Side by side

Grok 4 FastMistral Large 3
ProviderxAIMistral AI
Noometry Index39.439.1
Released2025-09-192025-12-02
WeightsProprietaryOpen
Context window—262K
Max output—8K
Input $ / M tokens—$0.25
Output $ / M tokens—$0.75
Results tracked3024

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Category by category

Coding Mistral Large 3 leads

Grok 4 Fast: 32.5 (#271), Mistral Large 3: 34.4 (#237)

BenchmarkGrok 4 FastMistral Large 3
LMArena WebDev11591230
LMArena Coding14291448
WeirdML42.9%—

Agentic & Tool Use Not comparable

Grok 4 Fast: 29.5 (#86), Mistral Large 3: —

BenchmarkGrok 4 FastMistral Large 3
τ²-bench Banking15.7%—
Cybench30%—
LMArena Search1171—

Reasoning Grok 4 Fast leads

Grok 4 Fast: 22.2 (#201), Mistral Large 3: 15.2 (#319)

BenchmarkGrok 4 FastMistral Large 3
Kagi LLM Benchmark66.1%50.9%
LMArena Hard Prompts14121429
ARC-AGI-25.3%—
NYT Connections (extended)—7.5%
ARC-AGI-148.5%—
Thematic Generalization—23%
DTBench82.7%—
Epoch Capabilities Index144.2—
ForecastBench60.5—

Math Too close to call

Grok 4 Fast: 38.9 (#123), Mistral Large 3: 38.7 (#129)

BenchmarkGrok 4 FastMistral Large 3
LMArena Math14191414

Knowledge Mistral Large 3 leads

Grok 4 Fast: 32.0 (#214), Mistral Large 3: 36.0 (#177)

BenchmarkGrok 4 FastMistral Large 3
Vectara Hallucination Rate19.7%14.5%
LMArena Expert14111421

Multimodal Not comparable

Grok 4 Fast: —, Mistral Large 3: 38.2 (#66)

BenchmarkGrok 4 FastMistral Large 3
LMArena Vision—1221

Multilingual Mistral Large 3 leads

Grok 4 Fast: 51.3 (#111), Mistral Large 3: 52.5 (#84)

BenchmarkGrok 4 FastMistral Large 3
LMArena Non-English13961413
LMArena Chinese14571447
LMArena French14311455
LMArena German13831437
LMArena Japanese13521394
LMArena Korean13571384
LMArena Russian13891411
LMArena Spanish14151440

Instruction Following Too close to call

Grok 4 Fast: 73.2 (#121), Mistral Large 3: 74.0 (#108)

BenchmarkGrok 4 FastMistral Large 3
LMArena Instruction Following13871403

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), Mistral Large 3: 43.1 (#105)

BenchmarkGrok 4 FastMistral Large 3
LMArena Longer Query14151413
Fiction.LiveBench94.4%—

Writing & Preference Too close to call

Grok 4 Fast: 60.0 (#102), Mistral Large 3: 60.0 (#101)

BenchmarkGrok 4 FastMistral Large 3
LMArena Text14071428
LMArena Creative Writing13871386
LMArena Multi-Turn14141429
EQ-Bench Creative Writing—1412

Frequently asked questions

Is Grok 4 Fast better than Mistral Large 3?

Grok 4 Fast and Mistral Large 3 score almost the same on the Noometry Index (39.4 vs 39.1), so choose on price, context window or the category you care about most.

Is Grok 4 Fast or Mistral Large 3 better for coding?

Mistral Large 3 scores higher on coding benchmarks: 34.4 versus 32.5 in the Noometry coding category.

How many benchmarks do Grok 4 Fast and Mistral Large 3 share?

20 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Mistral Large 3 has 24.

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