Noometry

Model comparison

GLM-5.3-Flash vs GPT-4.5

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 37.2 on the Noometry Index.

Last verified . 22 shared benchmarks.

GLM-5.3-Flash Z.ai (Zhipu)

51.8

Rank #41 Confirmed

GPT-4.5 OpenAI

37.2

Rank #208 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GLM-5.3-Flash scores higher in 10 categories and GPT-4.5 in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GLM-5.3-Flash leads 48.0 to 13.9.
  • The biggest single-benchmark swing is ARC-AGI-1: 91% for GLM-5.3-Flash and 10.3% for GPT-4.5.
  • GLM-5.3-Flash has downloadable open weights; the other is API-only.

Side by side

GLM-5.3-FlashGPT-4.5
ProviderZ.ai (Zhipu)OpenAI
Noometry Index51.837.2
Released2026-08-202025-02-27
WeightsOpenProprietary
Context window1M—
Max output131K—
Input $ / M tokens$0.15—
Output $ / M tokens$0.50—
Results tracked4042

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Category by category

Coding GLM-5.3-Flash leads

GLM-5.3-Flash: 53.1 (#31), GPT-4.5: 42.2 (#109)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Coding15081396
DeepSWE63.4%—
FrontierCode31.8%—
Aider Polyglot—44.9%
CursorBench36.8%—
LMArena WebDev1609—
FrontierSWE18.1%—
SciCode51.6%—
WeirdML—39.4%
LiveBench Coding—75.2%
ALE-Bench303.55—

Agentic & Tool Use GLM-5.3-Flash leads

GLM-5.3-Flash: 34.2 (#47), GPT-4.5: 27.9 (#97)

BenchmarkGLM-5.3-FlashGPT-4.5
APEX-Agents52.8%—
Cybench—17.5%
GDP.pdf14%—

Reasoning GLM-5.3-Flash leads

GLM-5.3-Flash: 48.0 (#42), GPT-4.5: 13.9 (#330)

BenchmarkGLM-5.3-FlashGPT-4.5
ARC-AGI-265.8%0.8%
ARC-AGI-191%10.3%
LMArena Hard Prompts14911403
Epoch Capabilities Index151.88136.74
SimpleBench—34.5%
CritPt15.4%—
Chess Puzzles14%—
EnigmaEval—3.2%
LiveBench Reasoning—71.1%
Mystery Game Puzzles8%—
LiveBench Data Analysis—64.3%
Surface Evolver Bench52.5%—
Bench to the Future 30.15—
ForecastBench—61.7
LiveBench—69%

Math GLM-5.3-Flash leads

GLM-5.3-Flash: 53.3 (#47), GPT-4.5: 32.6 (#211)

BenchmarkGLM-5.3-FlashGPT-4.5
OTIS Mock AIME 2024-202593.9%37.8%
LMArena Math15001412
FrontierMath (Tiers 1-3)55.8%—
FrontierMath Tier 417.1%—
ProofBench21%—
LiveBench Math—69.3%
MATH Level 5—78.6%

Knowledge GLM-5.3-Flash leads

GLM-5.3-Flash: 58.4 (#36), GPT-4.5: 32.5 (#211)

BenchmarkGLM-5.3-FlashGPT-4.5
GPQA Diamond90.2%68.7%
LMArena Expert15131394
Humanity's Last Exam—5.4%
Confabulations—13.6%

Multimodal GLM-5.3-Flash leads

GLM-5.3-Flash: 42.8 (#27), GPT-4.5: 37.6 (#71)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Vision12961195
VPCT—45%

Multilingual GLM-5.3-Flash leads

GLM-5.3-Flash: 56.0 (#25), GPT-4.5: 52.5 (#83)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Non-English14621413
LMArena Chinese15271421
LMArena French14961418
LMArena German14701457
LMArena Japanese14291416
LMArena Korean14461392
LMArena Russian14691419
LMArena Spanish1471—

Instruction Following GLM-5.3-Flash leads

GLM-5.3-Flash: 77.5 (#20), GPT-4.5: 72.6 (#134)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Instruction Following14781404
LiveBench Instruction Following—72.3%

Long Context GLM-5.3-Flash leads

GLM-5.3-Flash: 45.4 (#39), GPT-4.5: 40.4 (#155)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Longer Query14821406
Fiction.LiveBench—63.9%

Writing & Preference GLM-5.3-Flash leads

GLM-5.3-Flash: 65.3 (#50), GPT-4.5: 56.9 (#134)

BenchmarkGLM-5.3-FlashGPT-4.5
LMArena Text14711417
LMArena Creative Writing14421394
LMArena Multi-Turn14671444
Short-Story Creative Writing—75.6%
EQ-Bench Creative Writing—1258
LiveBench Language—61.5%

Frequently asked questions

Is GLM-5.3-Flash better than GPT-4.5?

GLM-5.3-Flash is the stronger model overall, scoring 51.8 to 37.2 on the Noometry Index.

Is GLM-5.3-Flash or GPT-4.5 better for coding?

GLM-5.3-Flash scores higher on coding benchmarks: 53.1 versus 42.2 in the Noometry coding category.

How many benchmarks do GLM-5.3-Flash and GPT-4.5 share?

22 benchmarks have published results for both models. GLM-5.3-Flash has 40 scored results on Noometry and GPT-4.5 has 42.

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