Noometry

Model comparison

Grok 4 Fast vs MiniMax-M2.5

Grok 4 Fast and MiniMax-M2.5 score almost the same on the Noometry Index (39.0 vs 38.1), so choose on price, context window or the category you care about most.

Last verified . 23 shared benchmarks.

Grok 4 Fast xAI

39.0

Rank #164 Confirmed

MiniMax-M2.5 MiniMax

38.1

Rank #181 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 37.4.
  • 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 Index39.038.1
Released2025-09-192026-02-12
WeightsProprietaryOpen
Context window—205K
Max output—131K
Input $ / M tokens—$0.30
Output $ / M tokens—$1.20
Results tracked3033

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding MiniMax-M2.5 leads

Grok 4 Fast: 32.3 (#264), MiniMax-M2.5: 47.9 (#53)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena WebDev11601386
LMArena Coding14291380
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: 29.3 (#80), MiniMax-M2.5: 30.2 (#70)

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: 22.5 (#179), MiniMax-M2.5: 17.6 (#281)

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 Prompts14131372
Epoch Capabilities Index144.21146.68
NYT Connections (extended)—16.8%
DTBench82.7%—
ForecastBench60.5—

Math Grok 4 Fast leads

Grok 4 Fast: 36.1 (#126), MiniMax-M2.5: 25.8 (#242)

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

Knowledge MiniMax-M2.5 leads

Grok 4 Fast: 31.5 (#211), MiniMax-M2.5: 38.6 (#132)

BenchmarkGrok 4 FastMiniMax-M2.5
Vectara Hallucination Rate19.7%9.1%
LMArena Expert14111378

Multilingual Grok 4 Fast leads

Grok 4 Fast: 51.5 (#106), MiniMax-M2.5: 47.3 (#147)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Non-English13971338
LMArena Chinese14581392
LMArena French14331363
LMArena German13831361
LMArena Japanese13581169
LMArena Korean13591232
LMArena Russian13871359
LMArena Spanish14141354

Instruction Following Grok 4 Fast leads

Grok 4 Fast: 73.4 (#116), MiniMax-M2.5: 71.7 (#143)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Instruction Following13881353

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), MiniMax-M2.5: 37.4 (#211)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Longer Query14151367
Fiction.LiveBench94.4%—
CL-bench—11.4%
CL-bench Life—6.3%

Writing & Preference Grok 4 Fast leads

Grok 4 Fast: 60.2 (#96), MiniMax-M2.5: 54.1 (#149)

BenchmarkGrok 4 FastMiniMax-M2.5
LMArena Text14071359
LMArena Creative Writing13881331
LMArena Multi-Turn14141364
EQ-Bench Creative Writing—1361

Frequently asked questions

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

Grok 4 Fast and MiniMax-M2.5 score almost the same on the Noometry Index (39.0 vs 38.1), so choose on price, context window or the category you care about most.

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

MiniMax-M2.5 scores higher on coding benchmarks: 47.9 versus 32.3 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.

Related comparisons

Go deeper