Noometry

Model comparison

GLM-5.3-Flash vs Grok 3

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 39.9 on the Noometry Index.

Last verified . 22 shared benchmarks.

GLM-5.3-Flash Z.ai (Zhipu)

51.8

Rank #41 Confirmed

Grok 3 xAI

39.9

Rank #157 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GLM-5.3-Flash scores higher in 9 categories and Grok 3 in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GLM-5.3-Flash leads 48.0 to 13.7.
  • The biggest single-benchmark swing is ARC-AGI-1: 91% for GLM-5.3-Flash and 5.5% for Grok 3.
  • GLM-5.3-Flash has downloadable open weights; the other is API-only.

Side by side

GLM-5.3-FlashGrok 3
ProviderZ.ai (Zhipu)xAI
Noometry Index51.839.9
Released2026-08-202025-04-09
WeightsOpenProprietary
Context window1M—
Max output131K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.50—
Results tracked4040

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Category by category

Coding GLM-5.3-Flash leads

GLM-5.3-Flash: 53.1 (#31), Grok 3: 41.9 (#115)

BenchmarkGLM-5.3-FlashGrok 3
LMArena Coding15081432
DeepSWE63.4%—
FrontierCode31.8%—
Aider Polyglot—53.3%
CursorBench36.8%—
LMArena WebDev1609—
FrontierSWE18.1%—
SciCode51.6%—
WeirdML—37.2%
ALE-Bench303.55—

Agentic & Tool Use GLM-5.3-Flash leads

GLM-5.3-Flash: 34.2 (#47), Grok 3: 30.5 (#76)

BenchmarkGLM-5.3-FlashGrok 3
APEX-Agents52.8%—
BALROG—29.5%
GDP.pdf14%—

Reasoning GLM-5.3-Flash leads

GLM-5.3-Flash: 48.0 (#42), Grok 3: 13.7 (#333)

BenchmarkGLM-5.3-FlashGrok 3
ARC-AGI-265.8%0%
ARC-AGI-191%5.5%
LMArena Hard Prompts14911434
Epoch Capabilities Index151.88138.33
SimpleBench—36.1%
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: 38.0 (#145)

BenchmarkGLM-5.3-FlashGrok 3
OTIS Mock AIME 2024-202593.9%55.6%
LMArena Math15001391
FrontierMath (Tiers 1-3)55.8%—
FrontierMath Tier 417.1%—
ProofBench21%—
Omni-MATH—46.4%
MATH Level 5—88.7%
FrontierMath (Feb 2025 set)—3.8%
FrontierMath Tier 4 (v1)—0%

Knowledge GLM-5.3-Flash leads

GLM-5.3-Flash: 58.4 (#36), Grok 3: 46.2 (#82)

BenchmarkGLM-5.3-FlashGrok 3
GPQA Diamond90.2%75.8%
LMArena Expert15131421
MMLU-Pro—78.8%
Confabulations—14.2%
Vectara Hallucination Rate—5.8%
GPQA (HELM)—65%

Multimodal Not comparable

GLM-5.3-Flash: 42.8 (#27), Grok 3: —

BenchmarkGLM-5.3-FlashGrok 3
LMArena Vision1296—

Multilingual GLM-5.3-Flash leads

GLM-5.3-Flash: 56.0 (#25), Grok 3: 52.3 (#87)

BenchmarkGLM-5.3-FlashGrok 3
LMArena Non-English14621410
LMArena Chinese15271448
LMArena French14961460
LMArena German14701431
LMArena Japanese14291387
LMArena Korean14461373
LMArena Russian14691416
LMArena Spanish14711417

Instruction Following GLM-5.3-Flash leads

GLM-5.3-Flash: 77.5 (#20), Grok 3: 75.0 (#73)

BenchmarkGLM-5.3-FlashGrok 3
LMArena Instruction Following14781409
IFEval—88.4%

Long Context GLM-5.3-Flash leads

GLM-5.3-Flash: 45.4 (#39), Grok 3: 38.7 (#192)

BenchmarkGLM-5.3-FlashGrok 3
LMArena Longer Query14821439
Fiction.LiveBench—58.3%

Writing & Preference GLM-5.3-Flash leads

GLM-5.3-Flash: 65.3 (#50), Grok 3: 55.8 (#141)

BenchmarkGLM-5.3-FlashGrok 3
LMArena Text14711426
LMArena Creative Writing14421414
LMArena Multi-Turn14671425
Short-Story Creative Writing—76.4%
EQ-Bench Creative Writing—1186
WildBench—84.9%

Frequently asked questions

Is GLM-5.3-Flash better than Grok 3?

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 39.9 on the Noometry Index.

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

GLM-5.3-Flash scores higher on coding benchmarks: 53.1 versus 41.9 in the Noometry coding category.

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

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

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