Noometry

Model comparison

Grok 4.1 Fast vs Pixtral Large

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 32.2 on the Noometry Index.

Last verified . 2 shared benchmarks.

Grok 4.1 Fast xAI

41.4

Rank #136 Confirmed

Pixtral Large Mistral AI

32.2

Rank #259 Reported

Summary

  • They share 2 benchmarks with published results for both. Grok 4.1 Fast scores higher in 3 categories and Pixtral Large in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in writing & preference, where Grok 4.1 Fast leads 57.2 to 32.9.
  • Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $2 / $6 for Pixtral Large.
  • Pixtral Large has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 FastPixtral Large
ProviderxAIMistral AI
Noometry Index41.432.2
Released2025-06-272024-11-01
WeightsProprietaryOpen
Context window128K128K
Max output30K128K
Input $ / M tokens$0.20$2
Output $ / M tokens$0.50$6
Results tracked323

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Category by category

Coding Not comparable

Grok 4.1 Fast: 34.1 (#245), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
LMArena WebDev1242—
LMArena Coding1411—
ALE-Bench394.93—

Agentic & Tool Use Not comparable

Grok 4.1 Fast: 36.3 (#39), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
Berkeley Function Calling Leaderboard69.6%—
τ²-bench Banking13.1%—
LMArena Search1171—
Vending-Bench 21,107—

Reasoning Grok 4.1 Fast leads

Grok 4.1 Fast: 43.4 (#49), Pixtral Large: 21.7 (#218)

BenchmarkGrok 4.1 FastPixtral Large
SimpleBench56%—
NYT Connections (extended)87.4%—
EnigmaEval—0.8%
LMArena Hard Prompts1407—
DTBench87.7%—
ForecastBench61—

Math Not comparable

Grok 4.1 Fast: 31.9 (#221), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
MathArena Final-Answer Competitions60.9%—
ProofBench4%—
LMArena Math1408—

Knowledge Not comparable

Grok 4.1 Fast: 33.1 (#207), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
Vectara Hallucination Rate17.8%—
LMArena Expert1399—

Multimodal Grok 4.1 Fast leads

Grok 4.1 Fast: 37.0 (#76), Pixtral Large: 30.6 (#111)

BenchmarkGrok 4.1 FastPixtral Large
LMArena Vision12011089

Multilingual Not comparable

Grok 4.1 Fast: 51.0 (#114), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
LMArena Non-English1391—
LMArena Chinese1441—
LMArena French1415—
LMArena German1404—
LMArena Japanese1349—
LMArena Korean1361—
LMArena Russian1387—
LMArena Spanish1413—

Instruction Following Not comparable

Grok 4.1 Fast: 72.7 (#133), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
LMArena Instruction Following1376—

Long Context Not comparable

Grok 4.1 Fast: 42.4 (#126), Pixtral Large: —

BenchmarkGrok 4.1 FastPixtral Large
LMArena Longer Query1390—

Writing & Preference Grok 4.1 Fast leads

Grok 4.1 Fast: 57.2 (#131), Pixtral Large: 32.9 (#278)

BenchmarkGrok 4.1 FastPixtral Large
EQ-Bench Creative Writing1327988
LMArena Text1408—
LMArena Creative Writing1394—
LMArena Multi-Turn1389—

Frequently asked questions

Is Grok 4.1 Fast better than Pixtral Large?

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 32.2 on the Noometry Index.

Which is cheaper, Grok 4.1 Fast or Pixtral Large?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Pixtral Large lists at $2 and $6.

Which has the bigger context window?

Both accept 128K tokens.

How many benchmarks do Grok 4.1 Fast and Pixtral Large share?

2 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Pixtral Large has 3.

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