Noometry

Model comparison

Grok 4.1 Fast vs Mixtral 8x7B

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 26.8 on the Noometry Index.

Last verified . 19 shared benchmarks.

Grok 4.1 Fast xAI

40.9

Rank #131 Confirmed

Mixtral 8x7B Mistral AI

26.8

Rank #328 Confirmed

Summary

  • They share 19 benchmarks with published results for both. Grok 4.1 Fast scores higher in 8 categories and Mixtral 8x7B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 17.4.
  • The biggest single-benchmark swing is DTBench: 87.7% for Grok 4.1 Fast and 49.6% for Mixtral 8x7B.
  • Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.70 / $0.70 for Mixtral 8x7B.
  • Grok 4.1 Fast accepts more context: 128K tokens versus 32K.
  • Mixtral 8x7B has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 FastMixtral 8x7B
ProviderxAIMistral AI
Noometry Index40.926.8
Released2025-06-272023-12-11
WeightsProprietaryOpen
Context window128K32K
Max output30K32K
Input $ / M tokens$0.20$0.70
Output $ / M tokens$0.50$0.70
Results tracked3238

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Category by category

Coding Grok 4.1 Fast leads

Grok 4.1 Fast: 33.8 (#236), Mixtral 8x7B: 32.2 (#265)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Coding14111127
LMArena WebDev1241—
ALE-Bench394.93—
HumanEval+—39.6%
MBPP+—49.7%

Agentic & Tool Use Not comparable

Grok 4.1 Fast: 36.1 (#35), Mixtral 8x7B: —

BenchmarkGrok 4.1 FastMixtral 8x7B
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: 42.3 (#45), Mixtral 8x7B: 17.4 (#283)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Hard Prompts14071115
DTBench87.7%49.6%
ForecastBench6156.3
SimpleBench56%—
NYT Connections (extended)87.4%—
Adversarial NLI—55.2%
Epoch Capabilities Index—118.38
HellaSwag—86.7%
PIQA—83.6%
WinoGrande—77.2%

Math Grok 4.1 Fast leads

Grok 4.1 Fast: 30.9 (#201), Mixtral 8x7B: 17.2 (#284)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Math14081147
MathArena Final-Answer Competitions60.9%—
ProofBench4%—
Omni-MATH—10.5%
MATH Level 5—10%
GSM8K—74.4%

Knowledge Grok 4.1 Fast leads

Grok 4.1 Fast: 32.6 (#203), Mixtral 8x7B: 11.0 (#296)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Expert13981088
GPQA Diamond—30.6%
MMLU-Pro—33.5%
Vectara Hallucination Rate17.8%—
GPQA (HELM)—29.6%
ARC (AI2) Challenge—87.3%
MMLU—70.6%
OpenBookQA—85.8%
TriviaQA—82.2%

Multimodal Not comparable

Grok 4.1 Fast: 36.3 (#71), Mixtral 8x7B: —

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Vision1201—

Multilingual Grok 4.1 Fast leads

Grok 4.1 Fast: 51.1 (#110), Mixtral 8x7B: 29.8 (#261)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Non-English13911077
LMArena Chinese14411055
LMArena French14161165
LMArena German14041114
LMArena Japanese1347931
LMArena Korean1361968
LMArena Russian13871090
LMArena Spanish14111110

Instruction Following Grok 4.1 Fast leads

Grok 4.1 Fast: 72.8 (#127), Mixtral 8x7B: 51.2 (#292)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Instruction Following13761110
IFEval—57.5%

Long Context Grok 4.1 Fast leads

Grok 4.1 Fast: 42.4 (#121), Mixtral 8x7B: 33.4 (#255)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Longer Query13901103

Writing & Preference Grok 4.1 Fast leads

Grok 4.1 Fast: 57.4 (#126), Mixtral 8x7B: 34.4 (#265)

BenchmarkGrok 4.1 FastMixtral 8x7B
LMArena Text14081132
LMArena Creative Writing13941109
LMArena Multi-Turn13891115
EQ-Bench Creative Writing1327—
WildBench—67.3%

Frequently asked questions

Is Grok 4.1 Fast better than Mixtral 8x7B?

Grok 4.1 Fast is the stronger model overall, scoring 40.9 to 26.8 on the Noometry Index.

Which is cheaper, Grok 4.1 Fast or Mixtral 8x7B?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Mixtral 8x7B lists at $0.70 and $0.70.

Is Grok 4.1 Fast or Mixtral 8x7B better for coding?

Grok 4.1 Fast scores higher on coding benchmarks: 33.8 versus 32.2 in the Noometry coding category.

Which has the bigger context window?

Grok 4.1 Fast does, with 128K tokens against 32K.

How many benchmarks do Grok 4.1 Fast and Mixtral 8x7B share?

19 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Mixtral 8x7B has 38.

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