Noometry

Model comparison

GLM-5.3-Flash vs Grok-3 mini

GLM-5.3-Flash is the stronger model overall, scoring 49.6 to 41.0 on the Noometry Index.

Last verified . 20 shared benchmarks.

GLM-5.3-Flash Z.ai (Zhipu)

49.6

Rank #45 Confirmed

Grok-3 mini xAI

41.0

Rank #130 Confirmed

Summary

  • They share 20 benchmarks with published results for both. GLM-5.3-Flash scores higher in 7 categories and Grok-3 mini in 1 category; 7 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GLM-5.3-Flash leads 31.7 to 13.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 93.9% for GLM-5.3-Flash and 77.8% for Grok-3 mini.
  • GLM-5.3-Flash has downloadable open weights; the other is API-only.

Side by side

GLM-5.3-FlashGrok-3 mini
ProviderZ.ai (Zhipu)xAI
Noometry Index49.641.0
Released2026-08-202025-04-09
WeightsOpenProprietary
Context window1M—
Max output131K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.50—
Results tracked3635

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Category by category

Coding GLM-5.3-Flash leads

GLM-5.3-Flash: 53.7 (#26), Grok-3 mini: 40.4 (#126)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Coding15061380
DeepSWE63.4%—
FrontierCode31.8%—
Aider Polyglot—49.3%
LMArena WebDev1614—
SciCode51.6%—
WeirdML—42.6%
ALE-Bench303.55—

Agentic & Tool Use Not comparable

GLM-5.3-Flash: 34.3 (#41), Grok-3 mini: —

BenchmarkGLM-5.3-FlashGrok-3 mini
APEX-Agents52.8%—
GDP.pdf14%—

Reasoning GLM-5.3-Flash leads

GLM-5.3-Flash: 31.7 (#69), Grok-3 mini: 13.8 (#323)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Hard Prompts14901374
Epoch Capabilities Index151.9140.35
ARC-AGI-2—0.4%
Kagi LLM Benchmark—61.3%
ARC-AGI-1—16.5%
CritPt15.4%—
Chess Puzzles14%—
Mystery Game Puzzles8%—
Surface Evolver Bench52.5%—
Bench to the Future 30.15—

Math GLM-5.3-Flash leads

GLM-5.3-Flash: 53.1 (#38), Grok-3 mini: 40.3 (#78)

BenchmarkGLM-5.3-FlashGrok-3 mini
OTIS Mock AIME 2024-202593.9%77.8%
LMArena Math14991386
FrontierMath (Tiers 1-3)55.8%—
FrontierMath Tier 417.1%—
ProofBench21%—
Omni-MATH—31.8%
MATH Level 5—90.9%
FrontierMath (Feb 2025 set)—5.9%

Knowledge GLM-5.3-Flash leads

GLM-5.3-Flash: 58.4 (#33), Grok-3 mini: 46.3 (#75)

BenchmarkGLM-5.3-FlashGrok-3 mini
GPQA Diamond90.2%76.3%
LMArena Expert15121395
MMLU-Pro—79.9%
Confabulations—10.8%
GPQA (HELM)—67.5%

Multimodal Not comparable

GLM-5.3-Flash: 42.6 (#25), Grok-3 mini: —

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Vision1304—

Multilingual GLM-5.3-Flash leads

GLM-5.3-Flash: 56.2 (#24), Grok-3 mini: 48.3 (#141)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Non-English14621352
LMArena Chinese15291387
LMArena French14951357
LMArena German14571350
LMArena Japanese14201343
LMArena Korean14431336
LMArena Russian14721352
LMArena Spanish14711379

Instruction Following Too close to call

GLM-5.3-Flash: 77.8 (#17), Grok-3 mini: 78.7 (#8)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Instruction Following14801356
IFEval—95.1%

Long Context GLM-5.3-Flash leads

GLM-5.3-Flash: 45.3 (#41), Grok-3 mini: 41.0 (#142)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Longer Query14791372
Fiction.LiveBench—66.7%

Writing & Preference GLM-5.3-Flash leads

GLM-5.3-Flash: 65.4 (#49), Grok-3 mini: 52.7 (#163)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Text14711370
LMArena Creative Writing14401342
LMArena Multi-Turn14711355
Short-Story Creative Writing—73.5%
WildBench—65.1%

Frequently asked questions

Is GLM-5.3-Flash better than Grok-3 mini?

GLM-5.3-Flash is the stronger model overall, scoring 49.6 to 41.0 on the Noometry Index.

Is GLM-5.3-Flash or Grok-3 mini better for coding?

GLM-5.3-Flash scores higher on coding benchmarks: 53.7 versus 40.4 in the Noometry coding category.

How many benchmarks do GLM-5.3-Flash and Grok-3 mini share?

20 benchmarks have published results for both models. GLM-5.3-Flash has 36 scored results on Noometry and Grok-3 mini has 35.

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