Model comparison

Grok 4.1 Fast vs Mistral Large 4

Mistral Large 4 is the stronger model overall, scoring 43.1 to 41.4 on the Noometry Index. Grok 4.1 Fast costs 3.8× less per token, which makes it the better buy when Mistral Large 4's lead doesn't matter for your workload.

Last verified October 10, 2026. 14 shared benchmarks.

Grok 4.1 Fast xAI

41.4

Rank #136 Confirmed

Mistral Large 4

Mistral AI

43.1

Rank #99 Confirmed

Summary

They share 14 benchmarks with published results for both. Grok 4.1 Fast scores higher in 1 category and Mistral Large 4 in 7 categories; 8 gaps are clear of the uncertainty.
The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 22.5.
The biggest single-benchmark swing is NYT Connections (extended): 87.4% for Grok 4.1 Fast and 27.4% for Mistral Large 4.
Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.68 / $2.09 for Mistral Large 4.
Mistral Large 4 accepts more context: 1.05M tokens versus 128K.

Side by side

Grok 4.1 Fast and Mistral Large 4 specifications
	Grok 4.1 Fast	Mistral Large 4
Provider	xAI	Mistral AI
Noometry Index	41.4	43.1
Released	2025-06-27	2026-10-06
Weights	Proprietary	Proprietary
Context window	128K	1.05M
Max output	30K	262K
Input $ / M tokens	$0.20	$0.68
Output $ / M tokens	$0.50	$2.09
Results tracked	32	15

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Category by category

Coding Mistral Large 4 leads

Grok 4.1 Fast: 34.1 (#245), Mistral Large 4: 48.6 (#57)

Coding benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena WebDev	1242	1541
LMArena Coding	1411	1475
ALE-Bench	394.93	—

Agentic & Tool Use Not comparable

Grok 4.1 Fast: 36.3 (#39), Mistral Large 4: —

Agentic & Tool Use benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
Berkeley Function Calling Leaderboard	69.6%	—
τ²-bench Banking	13.1%	—
LMArena Search	1171	—
Vending-Bench 2	1,107	—

Reasoning Grok 4.1 Fast leads

Grok 4.1 Fast: 43.4 (#49), Mistral Large 4: 22.5 (#192)

Reasoning benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
NYT Connections (extended)	87.4%	27.4%
LMArena Hard Prompts	1407	1444
SimpleBench	56%	—
DTBench	87.7%	—
ForecastBench	61	—

Math Mistral Large 4 leads

Grok 4.1 Fast: 31.9 (#221), Mistral Large 4: 40.4 (#91)

Math benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Math	1408	1488
MathArena Final-Answer Competitions	60.9%	—
ProofBench	4%	—

Knowledge Mistral Large 4 leads

Grok 4.1 Fast: 33.1 (#207), Mistral Large 4: 36.6 (#166)

Knowledge benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Expert	1399	1447
SimpleQA Verified	—	20%
Vectara Hallucination Rate	17.8%	—

Multimodal Not comparable

Grok 4.1 Fast: 37.0 (#76), Mistral Large 4: —

Multimodal benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Vision	1201	—

Multilingual Mistral Large 4 leads

Grok 4.1 Fast: 51.0 (#114), Mistral Large 4: 52.6 (#82)

Multilingual benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Non-English	1391	1415
LMArena Chinese	1441	1491
LMArena Russian	1387	1414
LMArena French	1415	—
LMArena German	1404	—
LMArena Japanese	1349	—
LMArena Korean	1361	—
LMArena Spanish	1413	—

Instruction Following Mistral Large 4 leads

Grok 4.1 Fast: 72.7 (#133), Mistral Large 4: 75.0 (#76)

Instruction Following benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Instruction Following	1376	1424

Long Context Mistral Large 4 leads

Grok 4.1 Fast: 42.4 (#126), Mistral Large 4: 43.6 (#89)

Long Context benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Longer Query	1390	1429

Writing & Preference Mistral Large 4 leads

Grok 4.1 Fast: 57.2 (#131), Mistral Large 4: 60.4 (#97)

Writing & Preference benchmarks
Benchmark	Grok 4.1 Fast	Mistral Large 4
LMArena Text	1408	1427
LMArena Creative Writing	1394	1361
LMArena Multi-Turn	1389	1424
EQ-Bench Creative Writing	1327	—

Frequently asked questions

Is Grok 4.1 Fast better than Mistral Large 4?

Which is cheaper, Grok 4.1 Fast or Mistral Large 4?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Mistral Large 4 lists at $0.68 and $2.09.

Is Grok 4.1 Fast or Mistral Large 4 better for coding?

Mistral Large 4 scores higher on coding benchmarks: 48.6 versus 34.1 in the Noometry coding category.

Which has the bigger context window?

Mistral Large 4 does, with 1.05M tokens against 128K.

How many benchmarks do Grok 4.1 Fast and Mistral Large 4 share?

14 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Mistral Large 4 has 15.