Noometry

Model comparison

Grok 4 Fast vs MiniMax-M3

MiniMax-M3 is the stronger model overall, scoring 43.8 to 39.4 on the Noometry Index.

Last verified . 21 shared benchmarks.

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

MiniMax-M3 MiniMax

43.8

Rank #85 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 32.0.
  • MiniMax-M3 has downloadable open weights; the other is API-only.

Side by side

Grok 4 FastMiniMax-M3
ProviderxAIMiniMax
Noometry Index39.443.8
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: 32.5 (#271), MiniMax-M3: 41.8 (#118)

BenchmarkGrok 4 FastMiniMax-M3
LMArena WebDev11591482
LMArena Coding14291469
FrontierCode—14.7%
SciCode—47.1%
WeirdML42.9%—
ALE-Bench—640.02

Agentic & Tool Use Grok 4 Fast leads

Grok 4 Fast: 29.5 (#86), MiniMax-M3: 22.6 (#130)

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: 22.2 (#201), MiniMax-M3: 30.1 (#87)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Hard Prompts14121447
DTBench82.7%78.9%
Epoch Capabilities Index144.2146.95
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: 38.9 (#123), MiniMax-M3: 40.0 (#95)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Math14191429
OTIS Mock AIME 2024-2025—71.1%
ProofBench—18%

Knowledge MiniMax-M3 leads

Grok 4 Fast: 32.0 (#214), MiniMax-M3: 58.4 (#35)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Expert14111461
GPQA Diamond—90.9%
Vectara Hallucination Rate19.7%—

Multimodal Not comparable

Grok 4 Fast: —, MiniMax-M3: 40.2 (#51)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Vision—1253
LMArena Document—1435

Multilingual MiniMax-M3 leads

Grok 4 Fast: 51.3 (#111), MiniMax-M3: 53.0 (#75)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Non-English13961420
LMArena Chinese14571463
LMArena French14311447
LMArena German13831426
LMArena Japanese13521381
LMArena Korean13571372
LMArena Russian13891428
LMArena Spanish14151432

Instruction Following MiniMax-M3 leads

Grok 4 Fast: 73.2 (#121), MiniMax-M3: 75.5 (#62)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Instruction Following13871433

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), MiniMax-M3: 44.2 (#72)

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

Writing & Preference MiniMax-M3 leads

Grok 4 Fast: 60.0 (#102), MiniMax-M3: 62.1 (#83)

BenchmarkGrok 4 FastMiniMax-M3
LMArena Text14071433
LMArena Creative Writing13871404
LMArena Multi-Turn14141442
EQ-Bench 4—1150

Frequently asked questions

Is Grok 4 Fast better than MiniMax-M3?

MiniMax-M3 is the stronger model overall, scoring 43.8 to 39.4 on the Noometry Index.

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

MiniMax-M3 scores higher on coding benchmarks: 41.8 versus 32.5 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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