Noometry

Model comparison

GLM-5.3-Flash vs Grok-3 mini

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 41.2 on the Noometry Index.

Last verified . 22 shared benchmarks.

GLM-5.3-Flash Z.ai (Zhipu)

51.8

Rank #41 Confirmed

Grok-3 mini xAI

41.2

Rank #141 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GLM-5.3-Flash scores higher in 7 categories and Grok-3 mini in 1 category; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GLM-5.3-Flash leads 48.0 to 13.6.
  • The biggest single-benchmark swing is ARC-AGI-1: 91% for GLM-5.3-Flash and 16.5% 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 Index51.841.2
Released2026-08-202025-04-09
WeightsOpenProprietary
Context window1M—
Max output131K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.50—
Results tracked4035

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Category by category

Coding GLM-5.3-Flash leads

GLM-5.3-Flash: 53.1 (#31), Grok-3 mini: 40.8 (#131)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Coding15081379
DeepSWE63.4%—
FrontierCode31.8%—
Aider Polyglot—49.3%
CursorBench36.8%—
LMArena WebDev1609—
FrontierSWE18.1%—
SciCode51.6%—
WeirdML—42.6%
ALE-Bench303.55—

Agentic & Tool Use Not comparable

GLM-5.3-Flash: 34.2 (#47), Grok-3 mini: —

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

Reasoning GLM-5.3-Flash leads

GLM-5.3-Flash: 48.0 (#42), Grok-3 mini: 13.6 (#334)

BenchmarkGLM-5.3-FlashGrok-3 mini
ARC-AGI-265.8%0.4%
ARC-AGI-191%16.5%
LMArena Hard Prompts14911375
Epoch Capabilities Index151.88140.35
Kagi LLM Benchmark—61.3%
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: 53.3 (#47), Grok-3 mini: 42.1 (#85)

BenchmarkGLM-5.3-FlashGrok-3 mini
OTIS Mock AIME 2024-202593.9%77.8%
LMArena Math15001386
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 (#36), Grok-3 mini: 46.4 (#81)

BenchmarkGLM-5.3-FlashGrok-3 mini
GPQA Diamond90.2%76.3%
LMArena Expert15131395
MMLU-Pro—79.9%
Confabulations—10.8%
GPQA (HELM)—67.5%

Multimodal Not comparable

GLM-5.3-Flash: 42.8 (#27), Grok-3 mini: —

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Vision1296—

Multilingual GLM-5.3-Flash leads

GLM-5.3-Flash: 56.0 (#25), Grok-3 mini: 48.1 (#145)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Non-English14621352
LMArena Chinese15271387
LMArena French14961357
LMArena German14701349
LMArena Japanese14291342
LMArena Korean14461335
LMArena Russian14691353
LMArena Spanish14711381

Instruction Following Grok-3 mini leads

GLM-5.3-Flash: 77.5 (#20), Grok-3 mini: 78.5 (#9)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Instruction Following14781357
IFEval—95.1%

Long Context GLM-5.3-Flash leads

GLM-5.3-Flash: 45.4 (#39), Grok-3 mini: 41.0 (#147)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Longer Query14821372
Fiction.LiveBench—66.7%

Writing & Preference GLM-5.3-Flash leads

GLM-5.3-Flash: 65.3 (#50), Grok-3 mini: 52.5 (#169)

BenchmarkGLM-5.3-FlashGrok-3 mini
LMArena Text14711370
LMArena Creative Writing14421342
LMArena Multi-Turn14671355
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 51.8 to 41.2 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: 53.1 versus 40.8 in the Noometry coding category.

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

22 benchmarks have published results for both models. GLM-5.3-Flash has 40 scored results on Noometry and Grok-3 mini has 35.

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