Noometry

Model comparison

Grok 4.1 Fast vs Mixtral 8x22B

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 27.1 on the Noometry Index.

Last verified . 19 shared benchmarks.

Grok 4.1 Fast xAI

41.4

Rank #136 Confirmed

Mixtral 8x22B Mistral AI

27.1

Rank #333 Confirmed

Summary

  • They share 19 benchmarks with published results for both. Grok 4.1 Fast scores higher in 9 categories and Mixtral 8x22B in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 19.9.
  • The biggest single-benchmark swing is DTBench: 87.7% for Grok 4.1 Fast and 55.1% for Mixtral 8x22B.
  • Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $2 / $6 for Mixtral 8x22B.
  • Grok 4.1 Fast accepts more context: 128K tokens versus 64K.
  • Mixtral 8x22B has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 FastMixtral 8x22B
ProviderxAIMistral AI
Noometry Index41.427.1
Released2025-06-272024-04-17
WeightsProprietaryOpen
Context window128K64K
Max output30K64K
Input $ / M tokens$0.20$2
Output $ / M tokens$0.50$6
Results tracked3234

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Category by category

Coding Grok 4.1 Fast leads

Grok 4.1 Fast: 34.1 (#245), Mixtral 8x22B: 24.2 (#329)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Coding14111166
LMArena WebDev1242—
WeirdML—3.2%
BigCodeBench Instruct—40.6%
BigCodeBench Complete—50.2%
ALE-Bench394.93—
HumanEval+—72%
MBPP+—64.3%

Agentic & Tool Use Grok 4.1 Fast leads

Grok 4.1 Fast: 36.3 (#39), Mixtral 8x22B: 23.1 (#127)

BenchmarkGrok 4.1 FastMixtral 8x22B
Berkeley Function Calling Leaderboard69.6%—
τ²-bench Banking13.1%—
Cybench—7.5%
LMArena Search1171—
Vending-Bench 21,107—

Reasoning Grok 4.1 Fast leads

Grok 4.1 Fast: 43.4 (#49), Mixtral 8x22B: 19.9 (#248)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Hard Prompts14071150
DTBench87.7%55.1%
ForecastBench6156.3
SimpleBench56%—
NYT Connections (extended)87.4%—
Epoch Capabilities Index—122.03

Math Grok 4.1 Fast leads

Grok 4.1 Fast: 31.9 (#221), Mixtral 8x22B: 22.9 (#275)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Math14081184
MathArena Final-Answer Competitions60.9%—
ProofBench4%—
Omni-MATH—16.3%
MATH Level 5—24.2%

Knowledge Grok 4.1 Fast leads

Grok 4.1 Fast: 33.1 (#207), Mixtral 8x22B: 15.1 (#293)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Expert13991113
GPQA Diamond—34.1%
MMLU-Pro—46%
Vectara Hallucination Rate17.8%—
GPQA (HELM)—33.4%
MMLU—77.8%

Multimodal Not comparable

Grok 4.1 Fast: 37.0 (#76), Mixtral 8x22B: —

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Vision1201—

Multilingual Grok 4.1 Fast leads

Grok 4.1 Fast: 51.0 (#114), Mixtral 8x22B: 32.8 (#255)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Non-English13911128
LMArena Chinese14411116
LMArena French14151166
LMArena German14041141
LMArena Japanese13491037
LMArena Korean13611057
LMArena Russian13871158
LMArena Spanish14131151

Instruction Following Grok 4.1 Fast leads

Grok 4.1 Fast: 72.7 (#133), Mixtral 8x22B: 57.7 (#266)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Instruction Following13761147
IFEval—72.4%

Long Context Grok 4.1 Fast leads

Grok 4.1 Fast: 42.4 (#126), Mixtral 8x22B: 34.7 (#247)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Longer Query13901144

Writing & Preference Grok 4.1 Fast leads

Grok 4.1 Fast: 57.2 (#131), Mixtral 8x22B: 36.9 (#262)

BenchmarkGrok 4.1 FastMixtral 8x22B
LMArena Text14081162
LMArena Creative Writing13941141
LMArena Multi-Turn13891130
EQ-Bench Creative Writing1327—
WildBench—71.1%

Frequently asked questions

Is Grok 4.1 Fast better than Mixtral 8x22B?

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 27.1 on the Noometry Index.

Which is cheaper, Grok 4.1 Fast or Mixtral 8x22B?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Mixtral 8x22B lists at $2 and $6.

Is Grok 4.1 Fast or Mixtral 8x22B better for coding?

Grok 4.1 Fast scores higher on coding benchmarks: 34.1 versus 24.2 in the Noometry coding category.

Which has the bigger context window?

Grok 4.1 Fast does, with 128K tokens against 64K.

How many benchmarks do Grok 4.1 Fast and Mixtral 8x22B share?

19 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Mixtral 8x22B has 34.

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