Noometry

Model comparison

GLM-4.7-Flash vs Grok 4 Fast

GLM-4.7-Flash and Grok 4 Fast score almost the same on the Noometry Index (38.8 vs 39.4), so choose on price, context window or the category you care about most.

Last verified . 17 shared benchmarks.

GLM-4.7-Flash Z.ai (Zhipu)

38.8

Rank #180 Confirmed

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Summary

  • They share 17 benchmarks with published results for both. GLM-4.7-Flash scores higher in 2 categories and Grok 4 Fast in 6 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.9.
  • The biggest single-benchmark swing is Vectara Hallucination Rate: 9.3% for GLM-4.7-Flash and 19.7% for Grok 4 Fast.
  • GLM-4.7-Flash has downloadable open weights; the other is API-only.

Side by side

GLM-4.7-FlashGrok 4 Fast
ProviderZ.ai (Zhipu)xAI
Noometry Index38.839.4
Released2026-01-192025-09-19
WeightsOpenProprietary
Context window200K—
Max output131K—
Input $ / M tokens$0.06—
Output $ / M tokens$0.40—
Results tracked2130

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Category by category

Coding GLM-4.7-Flash leads

GLM-4.7-Flash: 40.6 (#135), Grok 4 Fast: 32.5 (#271)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Coding13831429
LMArena WebDev—1159
WeirdML—42.9%

Agentic & Tool Use Not comparable

GLM-4.7-Flash: —, Grok 4 Fast: 29.5 (#86)

BenchmarkGLM-4.7-FlashGrok 4 Fast
τ²-bench Banking—15.7%
Cybench—30%
LMArena Search—1171

Reasoning Grok 4 Fast leads

GLM-4.7-Flash: 20.9 (#229), Grok 4 Fast: 22.2 (#201)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Hard Prompts13561412
ARC-AGI-2—5.3%
Kagi LLM Benchmark—66.1%
ARC-AGI-1—48.5%
Chess Puzzles0%—
DTBench—82.7%
Epoch Capabilities Index—144.2
ForecastBench—60.5

Math Grok 4 Fast leads

GLM-4.7-Flash: 36.1 (#173), Grok 4 Fast: 38.9 (#123)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Math13551419
OTIS Mock AIME 2024-202558.3%—

Knowledge GLM-4.7-Flash leads

GLM-4.7-Flash: 35.5 (#184), Grok 4 Fast: 32.0 (#214)

BenchmarkGLM-4.7-FlashGrok 4 Fast
Vectara Hallucination Rate9.3%19.7%
LMArena Expert13571411
GPQA Diamond60.5%—

Multilingual Grok 4 Fast leads

GLM-4.7-Flash: 46.5 (#158), Grok 4 Fast: 51.3 (#111)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Non-English13301396
LMArena Chinese14031457
LMArena French13321431
LMArena German13371383
LMArena Korean12831357
LMArena Russian13321389
LMArena Spanish13501415
LMArena Japanese—1352

Instruction Following Grok 4 Fast leads

GLM-4.7-Flash: 70.1 (#167), Grok 4 Fast: 73.2 (#121)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Instruction Following13271387

Long Context Grok 4 Fast leads

GLM-4.7-Flash: 40.9 (#148), Grok 4 Fast: 63.2 (#3)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Longer Query13451415
Fiction.LiveBench—94.4%

Writing & Preference Grok 4 Fast leads

GLM-4.7-Flash: 47.4 (#210), Grok 4 Fast: 60.0 (#102)

BenchmarkGLM-4.7-FlashGrok 4 Fast
LMArena Text13511407
LMArena Creative Writing12971387
LMArena Multi-Turn13421414
EQ-Bench Creative Writing1125—

Frequently asked questions

Is GLM-4.7-Flash better than Grok 4 Fast?

GLM-4.7-Flash and Grok 4 Fast score almost the same on the Noometry Index (38.8 vs 39.4), so choose on price, context window or the category you care about most.

Is GLM-4.7-Flash or Grok 4 Fast better for coding?

GLM-4.7-Flash scores higher on coding benchmarks: 40.6 versus 32.5 in the Noometry coding category.

How many benchmarks do GLM-4.7-Flash and Grok 4 Fast share?

17 benchmarks have published results for both models. GLM-4.7-Flash has 21 scored results on Noometry and Grok 4 Fast has 30.

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