Noometry

Model comparison

Grok 4 Fast vs MiniMax-M3

MiniMax-M3 is the stronger model overall, scoring 43.5 to 39.0 on the Noometry Index.

Last verified . 21 shared benchmarks.

Grok 4 Fast xAI

39.0

Rank #164 Confirmed

MiniMax-M3 MiniMax

43.5

Rank #81 Confirmed

Summary

  • They share 21 benchmarks with published results for both. Grok 4 Fast scores higher in 2 categories and MiniMax-M3 in 7 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where MiniMax-M3 leads 58.4 to 31.5.
  • MiniMax-M3 has downloadable open weights; the other is API-only.

Side by side

Grok 4 FastMiniMax-M3
ProviderxAIMiniMax
Noometry Index39.043.5
Released2025-09-192026-06-01
WeightsProprietaryOpen
Context window—1M
Max output—512K
Input $ / M tokens—$0.30
Output $ / M tokens—$1.20
Results tracked3041

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Category by category

Coding MiniMax-M3 leads

Grok 4 Fast: 32.3 (#264), MiniMax-M3: 41.5 (#111)

BenchmarkGrok 4 FastMiniMax-M3
LMArena WebDev11601482
LMArena Coding14291470
FrontierCode—14.7%
SciCode—47.1%
WeirdML42.9%—
ALE-Bench—640.02

Agentic & Tool Use Grok 4 Fast leads

Grok 4 Fast: 29.3 (#80), MiniMax-M3: 22.5 (#121)

BenchmarkGrok 4 FastMiniMax-M3
APEX-Agents—37.7%
OSWorld 2.0—4.6%
τ²-bench Banking15.7%—
Cybench30%—
GBAEval—0.9%
LMArena Search1171—
Vending-Bench 2—2,158

Reasoning MiniMax-M3 leads

Grok 4 Fast: 22.5 (#179), MiniMax-M3: 29.3 (#83)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Hard Prompts14131447
DTBench82.7%78.9%
Epoch Capabilities Index144.21147
ForecastBench60.561.4
ARC-AGI-25.3%—
SimpleBench—45.8%
Kagi LLM Benchmark66.1%—
NYT Connections (extended)—65.1%
ARC-AGI-148.5%—
CritPt—3.7%
Chess Puzzles—14%
Mystery Game Puzzles—8%
LMCA—33.7%
Surface Evolver Bench—55%

Math MiniMax-M3 leads

Grok 4 Fast: 36.1 (#126), MiniMax-M3: 39.1 (#83)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Math14191432
OTIS Mock AIME 2024-2025—71.1%
ProofBench—18%

Knowledge MiniMax-M3 leads

Grok 4 Fast: 31.5 (#211), MiniMax-M3: 58.4 (#32)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Expert14111462
GPQA Diamond—90.9%
Vectara Hallucination Rate19.7%—

Multimodal Not comparable

Grok 4 Fast: —, MiniMax-M3: 39.5 (#45)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Vision—1254
LMArena Document—1435

Multilingual MiniMax-M3 leads

Grok 4 Fast: 51.5 (#106), MiniMax-M3: 53.2 (#70)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Non-English13971420
LMArena Chinese14581465
LMArena French14331445
LMArena German13831424
LMArena Japanese13581381
LMArena Korean13591372
LMArena Russian13871430
LMArena Spanish14141431

Instruction Following MiniMax-M3 leads

Grok 4 Fast: 73.4 (#116), MiniMax-M3: 75.7 (#56)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Instruction Following13881433

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), MiniMax-M3: 44.2 (#68)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Longer Query14151445
Fiction.LiveBench94.4%—

Writing & Preference MiniMax-M3 leads

Grok 4 Fast: 60.2 (#96), MiniMax-M3: 62.3 (#79)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Text14071433
LMArena Creative Writing13881405
LMArena Multi-Turn14141441
EQ-Bench 4—1150

Frequently asked questions

Is Grok 4 Fast better than MiniMax-M3?

MiniMax-M3 is the stronger model overall, scoring 43.5 to 39.0 on the Noometry Index.

Is Grok 4 Fast or MiniMax-M3 better for coding?

MiniMax-M3 scores higher on coding benchmarks: 41.5 versus 32.3 in the Noometry coding category.

How many benchmarks do Grok 4 Fast and MiniMax-M3 share?

21 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and MiniMax-M3 has 41.

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