Model comparison

GLM-4.7-Flash vs Grok 4.1 Fast

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 38.8 on the Noometry Index. GLM-4.7-Flash costs 1.9× less per token, which makes it the better buy when Grok 4.1 Fast's lead doesn't matter for your workload.

Last verified October 10, 2026. 18 shared benchmarks.

GLM-4.7-Flash Z.ai (Zhipu)

38.8

Rank #180 Confirmed

Grok 4.1 Fast xAI

41.4

Rank #136 Confirmed

Summary

They share 18 benchmarks with published results for both. GLM-4.7-Flash scores higher in 3 categories and Grok 4.1 Fast in 5 categories; 8 gaps are clear of the uncertainty.
The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 20.9.
The biggest single-benchmark swing is Vectara Hallucination Rate: 9.3% for GLM-4.7-Flash and 17.8% for Grok 4.1 Fast.
GLM-4.7-Flash is cheaper at $0.06 / $0.40 per million input/output tokens, against $0.20 / $0.50 for Grok 4.1 Fast.
GLM-4.7-Flash accepts more context: 200K tokens versus 128K.
GLM-4.7-Flash has downloadable open weights; the other is API-only.

Side by side

GLM-4.7-Flash and Grok 4.1 Fast specifications
	GLM-4.7-Flash	Grok 4.1 Fast
Provider	Z.ai (Zhipu)	xAI
Noometry Index	38.8	41.4
Released	2026-01-19	2025-06-27
Weights	Open	Proprietary
Context window	200K	128K
Max output	131K	30K
Input $ / M tokens	$0.06	$0.20
Output $ / M tokens	$0.40	$0.50
Results tracked	21	32

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Category by category

Coding GLM-4.7-Flash leads

GLM-4.7-Flash: 40.6 (#135), Grok 4.1 Fast: 34.1 (#245)

Coding benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Coding	1383	1411
LMArena WebDev	—	1242
ALE-Bench	—	394.93

Agentic & Tool Use Not comparable

GLM-4.7-Flash: —, Grok 4.1 Fast: 36.3 (#39)

Agentic & Tool Use benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
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

GLM-4.7-Flash: 20.9 (#229), Grok 4.1 Fast: 43.4 (#49)

Reasoning benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Hard Prompts	1356	1407
SimpleBench	—	56%
NYT Connections (extended)	—	87.4%
Chess Puzzles	0%	—
DTBench	—	87.7%
ForecastBench	—	61

Math GLM-4.7-Flash leads

GLM-4.7-Flash: 36.1 (#173), Grok 4.1 Fast: 31.9 (#221)

Math benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Math	1355	1408
MathArena Final-Answer Competitions	—	60.9%
OTIS Mock AIME 2024-2025	58.3%	—
ProofBench	—	4%

Knowledge GLM-4.7-Flash leads

GLM-4.7-Flash: 35.5 (#184), Grok 4.1 Fast: 33.1 (#207)

Knowledge benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
Vectara Hallucination Rate	9.3%	17.8%
LMArena Expert	1357	1399
GPQA Diamond	60.5%	—

Multimodal Not comparable

GLM-4.7-Flash: —, Grok 4.1 Fast: 37.0 (#76)

Multimodal benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Vision	—	1201

Multilingual Grok 4.1 Fast leads

GLM-4.7-Flash: 46.5 (#158), Grok 4.1 Fast: 51.0 (#114)

Multilingual benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Non-English	1330	1391
LMArena Chinese	1403	1441
LMArena French	1332	1415
LMArena German	1337	1404
LMArena Korean	1283	1361
LMArena Russian	1332	1387
LMArena Spanish	1350	1413
LMArena Japanese	—	1349

Instruction Following Grok 4.1 Fast leads

GLM-4.7-Flash: 70.1 (#167), Grok 4.1 Fast: 72.7 (#133)

Instruction Following benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Instruction Following	1327	1376

Long Context Grok 4.1 Fast leads

GLM-4.7-Flash: 40.9 (#148), Grok 4.1 Fast: 42.4 (#126)

Long Context benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Longer Query	1345	1390

Writing & Preference Grok 4.1 Fast leads

GLM-4.7-Flash: 47.4 (#210), Grok 4.1 Fast: 57.2 (#131)

Writing & Preference benchmarks
Benchmark	GLM-4.7-Flash	Grok 4.1 Fast
LMArena Text	1351	1408
LMArena Creative Writing	1297	1394
EQ-Bench Creative Writing	1125	1327
LMArena Multi-Turn	1342	1389

Frequently asked questions

Is GLM-4.7-Flash better than Grok 4.1 Fast?

Which is cheaper, GLM-4.7-Flash or Grok 4.1 Fast?

GLM-4.7-Flash is cheaper. It lists at $0.06 per million input tokens and $0.40 per million output tokens; Grok 4.1 Fast lists at $0.20 and $0.50.

Is GLM-4.7-Flash or Grok 4.1 Fast better for coding?

GLM-4.7-Flash scores higher on coding benchmarks: 40.6 versus 34.1 in the Noometry coding category.

Which has the bigger context window?

GLM-4.7-Flash does, with 200K tokens against 128K.

How many benchmarks do GLM-4.7-Flash and Grok 4.1 Fast share?

18 benchmarks have published results for both models. GLM-4.7-Flash has 21 scored results on Noometry and Grok 4.1 Fast has 32.