Model comparison

Grok 4.1 Fast vs MiniMax-M3

MiniMax-M3 is the stronger model overall, scoring 43.5 to 40.9 on the Noometry Index. Grok 4.1 Fast costs 1.9× less per token, which makes it the better buy when MiniMax-M3's lead doesn't matter for your workload.

Last verified October 10, 2026. 26 shared benchmarks.

Grok 4.1 Fast xAI

40.9

Rank #131 Confirmed

MiniMax-M3

MiniMax

43.5

Rank #81 Confirmed

Summary

They share 26 benchmarks with published results for both. Grok 4.1 Fast scores higher in 2 categories and MiniMax-M3 in 8 categories; 10 gaps are clear of the uncertainty.
The widest gap is in knowledge, where MiniMax-M3 leads 58.4 to 32.6.
The biggest single-benchmark swing is NYT Connections (extended): 87.4% for Grok 4.1 Fast and 65.1% for MiniMax-M3.
Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.30 / $1.20 for MiniMax-M3.
MiniMax-M3 accepts more context: 1M tokens versus 128K.
MiniMax-M3 has downloadable open weights; the other is API-only.

Side by side

Grok 4.1 Fast and MiniMax-M3 specifications
	Grok 4.1 Fast	MiniMax-M3
Provider	xAI	MiniMax
Noometry Index	40.9	43.5
Released	2025-06-27	2026-06-01
Weights	Proprietary	Open
Context window	128K	1M
Max output	30K	512K
Input $ / M tokens	$0.20	$0.30
Output $ / M tokens	$0.50	$1.20
Results tracked	32	41

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Category by category

Coding MiniMax-M3 leads

Grok 4.1 Fast: 33.8 (#236), MiniMax-M3: 41.5 (#111)

Coding benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena WebDev	1241	1482
LMArena Coding	1411	1470
ALE-Bench	394.93	640.02
FrontierCode	—	14.7%
SciCode	—	47.1%

Agentic & Tool Use Grok 4.1 Fast leads

Grok 4.1 Fast: 36.1 (#35), MiniMax-M3: 22.5 (#121)

Agentic & Tool Use benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
Vending-Bench 2	1,107	2,158
APEX-Agents	—	37.7%
Berkeley Function Calling Leaderboard	69.6%	—
OSWorld 2.0	—	4.6%
τ²-bench Banking	13.1%	—
GBAEval	—	0.9%
LMArena Search	1171	—

Reasoning Grok 4.1 Fast leads

Grok 4.1 Fast: 42.3 (#45), MiniMax-M3: 29.3 (#83)

Reasoning benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
SimpleBench	56%	45.8%
NYT Connections (extended)	87.4%	65.1%
LMArena Hard Prompts	1407	1447
DTBench	87.7%	78.9%
ForecastBench	61	61.4
CritPt	—	3.7%
Chess Puzzles	—	14%
Mystery Game Puzzles	—	8%
LMCA	—	33.7%
Surface Evolver Bench	—	55%
Epoch Capabilities Index	—	147

Math MiniMax-M3 leads

Grok 4.1 Fast: 30.9 (#201), MiniMax-M3: 39.1 (#83)

Math benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
ProofBench	4%	18%
LMArena Math	1408	1432
MathArena Final-Answer Competitions	60.9%	—
OTIS Mock AIME 2024-2025	—	71.1%

Knowledge MiniMax-M3 leads

Grok 4.1 Fast: 32.6 (#203), MiniMax-M3: 58.4 (#32)

Knowledge benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Expert	1398	1462
GPQA Diamond	—	90.9%
Vectara Hallucination Rate	17.8%	—

Multimodal MiniMax-M3 leads

Grok 4.1 Fast: 36.3 (#71), MiniMax-M3: 39.5 (#45)

Multimodal benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Vision	1201	1254
LMArena Document	—	1435

Multilingual MiniMax-M3 leads

Grok 4.1 Fast: 51.1 (#110), MiniMax-M3: 53.2 (#70)

Multilingual benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Non-English	1391	1420
LMArena Chinese	1441	1465
LMArena French	1416	1445
LMArena German	1404	1424
LMArena Japanese	1347	1381
LMArena Korean	1361	1372
LMArena Russian	1387	1430
LMArena Spanish	1411	1431

Instruction Following MiniMax-M3 leads

Grok 4.1 Fast: 72.8 (#127), MiniMax-M3: 75.7 (#56)

Instruction Following benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Instruction Following	1376	1433

Long Context MiniMax-M3 leads

Grok 4.1 Fast: 42.4 (#121), MiniMax-M3: 44.2 (#68)

Long Context benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Longer Query	1390	1445

Writing & Preference MiniMax-M3 leads

Grok 4.1 Fast: 57.4 (#126), MiniMax-M3: 62.3 (#79)

Writing & Preference benchmarks
Benchmark	Grok 4.1 Fast	MiniMax-M3
LMArena Text	1408	1433
LMArena Creative Writing	1394	1405
LMArena Multi-Turn	1389	1441
EQ-Bench Creative Writing	1327	—
EQ-Bench 4	—	1150

Frequently asked questions

Is Grok 4.1 Fast better than MiniMax-M3?

Which is cheaper, Grok 4.1 Fast or MiniMax-M3?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; MiniMax-M3 lists at $0.30 and $1.20.

Is Grok 4.1 Fast or MiniMax-M3 better for coding?

MiniMax-M3 scores higher on coding benchmarks: 41.5 versus 33.8 in the Noometry coding category.

Which has the bigger context window?

MiniMax-M3 does, with 1M tokens against 128K.

How many benchmarks do Grok 4.1 Fast and MiniMax-M3 share?

26 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and MiniMax-M3 has 41.