Noometry

Model comparison

Grok 4 Fast vs MiniMax-M2.5

Grok 4 Fast is the stronger model overall, scoring 39.4 to 38.3 on the Noometry Index.

Last verified . 23 shared benchmarks.

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

MiniMax-M2.5 MiniMax

38.3

Rank #188 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Grok 4 Fast scores higher in 6 categories and MiniMax-M2.5 in 3 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 Fast leads 63.2 to 37.5.
  • The biggest single-benchmark swing is ARC-AGI-1: 48.5% for Grok 4 Fast and 63.7% for MiniMax-M2.5.
  • MiniMax-M2.5 has downloadable open weights; the other is API-only.

Side by side

Grok 4 FastMiniMax-M2.5
ProviderxAIMiniMax
Noometry Index39.438.3
Released2025-09-192026-02-12
WeightsProprietaryOpen
Context window—205K
Max output—131K
Input $ / M tokens—$0.30
Output $ / M tokens—$1.20
Results tracked3033

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Category by category

Coding MiniMax-M2.5 leads

Grok 4 Fast: 32.5 (#271), MiniMax-M2.5: 48.1 (#58)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena WebDev11591387
LMArena Coding14291381
SWE-bench Verified (bash only)—75.8%
SWE-bench Multilingual—68.3%
WeirdML42.9%—
ALE-Bench—618.17

Agentic & Tool Use Too close to call

Grok 4 Fast: 29.5 (#86), MiniMax-M2.5: 30.4 (#77)

BenchmarkGrok 4 FastMiniMax-M2.5
Terminal-Bench—42.7%
τ²-bench Banking15.7%—
Cybench30%—
LMArena Search1171—
Vending-Bench 2—-23.16

Reasoning Grok 4 Fast leads

Grok 4 Fast: 22.2 (#201), MiniMax-M2.5: 17.5 (#292)

BenchmarkGrok 4 FastMiniMax-M2.5
ARC-AGI-25.3%4.9%
Kagi LLM Benchmark66.1%55.2%
ARC-AGI-148.5%63.7%
LMArena Hard Prompts14121372
Epoch Capabilities Index144.2146.68
NYT Connections (extended)—16.8%
DTBench82.7%—
ForecastBench60.5—

Math Grok 4 Fast leads

Grok 4 Fast: 38.9 (#123), MiniMax-M2.5: 26.9 (#253)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Math14191378
ProofBench—4%

Knowledge MiniMax-M2.5 leads

Grok 4 Fast: 32.0 (#214), MiniMax-M2.5: 39.2 (#135)

BenchmarkGrok 4 FastMiniMax-M2.5
Vectara Hallucination Rate19.7%9.1%
LMArena Expert14111379

Multilingual Grok 4 Fast leads

Grok 4 Fast: 51.3 (#111), MiniMax-M2.5: 47.1 (#152)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Non-English13961338
LMArena Chinese14571393
LMArena French14311362
LMArena German13831362
LMArena Japanese13521171
LMArena Korean13571232
LMArena Russian13891358
LMArena Spanish14151354

Instruction Following Grok 4 Fast leads

Grok 4 Fast: 73.2 (#121), MiniMax-M2.5: 71.5 (#148)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Instruction Following13871353

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), MiniMax-M2.5: 37.5 (#216)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Longer Query14151366
Fiction.LiveBench94.4%—
CL-bench—11.4%
CL-bench Life—6.3%

Writing & Preference Grok 4 Fast leads

Grok 4 Fast: 60.0 (#102), MiniMax-M2.5: 53.9 (#153)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Text14071359
LMArena Creative Writing13871331
LMArena Multi-Turn14141364
EQ-Bench Creative Writing—1361

Frequently asked questions

Is Grok 4 Fast better than MiniMax-M2.5?

Grok 4 Fast is the stronger model overall, scoring 39.4 to 38.3 on the Noometry Index.

Is Grok 4 Fast or MiniMax-M2.5 better for coding?

MiniMax-M2.5 scores higher on coding benchmarks: 48.1 versus 32.5 in the Noometry coding category.

How many benchmarks do Grok 4 Fast and MiniMax-M2.5 share?

23 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and MiniMax-M2.5 has 33.

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