Noometry

Model comparison

GLM-5.3-Flash vs Kimi K2.5 Instant

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 43.6 on the Noometry Index.

Last verified . 18 shared benchmarks.

GLM-5.3-Flash Z.ai (Zhipu)

51.8

Rank #41 Confirmed

Kimi K2.5 Instant Moonshot AI

43.6

Rank #89 Confirmed

Summary

  • They share 18 benchmarks with published results for both. GLM-5.3-Flash scores higher in 9 categories and Kimi K2.5 Instant 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 29.7.

Side by side

GLM-5.3-FlashKimi K2.5 Instant
ProviderZ.ai (Zhipu)Moonshot AI
Noometry Index51.843.6
Released2026-08-20—
WeightsOpenOpen
Context window1M—
Max output131K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.50—
Results tracked4018

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Category by category

Coding GLM-5.3-Flash leads

GLM-5.3-Flash: 53.1 (#31), Kimi K2.5 Instant: 42.6 (#97)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena WebDev16091404
LMArena Coding15081484
DeepSWE63.4%—
FrontierCode31.8%—
CursorBench36.8%—
FrontierSWE18.1%—
SciCode51.6%—
ALE-Bench303.55—

Agentic & Tool Use Not comparable

GLM-5.3-Flash: 34.2 (#47), Kimi K2.5 Instant: —

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
APEX-Agents52.8%—
GDP.pdf14%—

Reasoning GLM-5.3-Flash leads

GLM-5.3-Flash: 48.0 (#42), Kimi K2.5 Instant: 29.7 (#90)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Hard Prompts14911443
ARC-AGI-265.8%—
ARC-AGI-191%—
CritPt15.4%—
Chess Puzzles14%—
Mystery Game Puzzles8%—
Surface Evolver Bench52.5%—
Bench to the Future 30.15—
Epoch Capabilities Index151.88—

Math GLM-5.3-Flash leads

GLM-5.3-Flash: 53.3 (#47), Kimi K2.5 Instant: 39.4 (#105)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Math15001442
FrontierMath (Tiers 1-3)55.8%—
FrontierMath Tier 417.1%—
OTIS Mock AIME 2024-202593.9%—
ProofBench21%—

Knowledge GLM-5.3-Flash leads

GLM-5.3-Flash: 58.4 (#36), Kimi K2.5 Instant: 40.2 (#123)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Expert15131440
GPQA Diamond90.2%—

Multimodal GLM-5.3-Flash leads

GLM-5.3-Flash: 42.8 (#27), Kimi K2.5 Instant: 40.2 (#50)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Vision12961254

Multilingual GLM-5.3-Flash leads

GLM-5.3-Flash: 56.0 (#25), Kimi K2.5 Instant: 52.0 (#94)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Non-English14621406
LMArena Chinese15271449
LMArena French14961403
LMArena German14701413
LMArena Korean14461378
LMArena Russian14691404
LMArena Spanish14711447
LMArena Japanese1429—

Instruction Following GLM-5.3-Flash leads

GLM-5.3-Flash: 77.5 (#20), Kimi K2.5 Instant: 75.3 (#65)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Instruction Following14781430

Long Context GLM-5.3-Flash leads

GLM-5.3-Flash: 45.4 (#39), Kimi K2.5 Instant: 43.9 (#83)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Longer Query14821435

Writing & Preference GLM-5.3-Flash leads

GLM-5.3-Flash: 65.3 (#50), Kimi K2.5 Instant: 60.6 (#95)

BenchmarkGLM-5.3-FlashKimi K2.5 Instant
LMArena Text14711420
LMArena Creative Writing14421381
LMArena Multi-Turn14671427

Frequently asked questions

Is GLM-5.3-Flash better than Kimi K2.5 Instant?

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 43.6 on the Noometry Index.

Is GLM-5.3-Flash or Kimi K2.5 Instant better for coding?

GLM-5.3-Flash scores higher on coding benchmarks: 53.1 versus 42.6 in the Noometry coding category.

How many benchmarks do GLM-5.3-Flash and Kimi K2.5 Instant share?

18 benchmarks have published results for both models. GLM-5.3-Flash has 40 scored results on Noometry and Kimi K2.5 Instant has 18.

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