Noometry

Model comparison

Claude 3 Opus vs GLM-5.3-Flash

GLM-5.3-Flash is the stronger model overall, scoring 49.6 to 29.3 on the Noometry Index.

Last verified . 22 shared benchmarks.

Claude 3 Opus Anthropic

29.3

Rank #300 Confirmed

GLM-5.3-Flash Z.ai (Zhipu)

49.6

Rank #45 Confirmed

Summary

  • They share 22 benchmarks with published results for both. Claude 3 Opus scores higher in 0 categories and GLM-5.3-Flash in 10 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where GLM-5.3-Flash leads 53.1 to 13.9.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.7% for Claude 3 Opus and 93.9% for GLM-5.3-Flash.
  • GLM-5.3-Flash has downloadable open weights; the other is API-only.

Side by side

Claude 3 OpusGLM-5.3-Flash
ProviderAnthropicZ.ai (Zhipu)
Noometry Index29.349.6
Released2024-02-292026-08-20
WeightsProprietaryOpen
Context window—1M
Max output—131K
Input $ / M tokens—$0.15
Output $ / M tokens—$0.50
Results tracked4636

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Category by category

Coding GLM-5.3-Flash leads

Claude 3 Opus: 32.4 (#261), GLM-5.3-Flash: 53.7 (#26)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Coding12641506
DeepSWE—63.4%
FrontierCode—31.8%
LMArena WebDev—1614
SciCode—51.6%
WeirdML19.2%—
BigCodeBench Instruct45.5%—
LiveBench Coding38.6%—
BigCodeBench Complete57.4%—
ALE-Bench—303.55
HumanEval+77.4%—
MBPP+73.3%—

Agentic & Tool Use GLM-5.3-Flash leads

Claude 3 Opus: 24.3 (#110), GLM-5.3-Flash: 34.3 (#41)

BenchmarkClaude 3 OpusGLM-5.3-Flash
APEX-Agents—52.8%
Cybench10%—
GDP.pdf—14%
METR Time Horizons29.5%—

Reasoning GLM-5.3-Flash leads

Claude 3 Opus: 14.2 (#318), GLM-5.3-Flash: 31.7 (#69)

BenchmarkClaude 3 OpusGLM-5.3-Flash
Chess Puzzles5%14%
LMArena Hard Prompts12461490
Epoch Capabilities Index126.91151.9
SimpleBench23.5%—
CritPt—15.4%
EnigmaEval0.8%—
LiveBench Reasoning40.6%—
Mystery Game Puzzles—8%
DTBench61.6%—
LiveBench Data Analysis57.9%—
LMCA17%—
Surface Evolver Bench—52.5%
Bench to the Future 3—0.15
ForecastBench58.4—
LiveBench49.2%—
WinoGrande88.5%—

Math GLM-5.3-Flash leads

Claude 3 Opus: 13.9 (#293), GLM-5.3-Flash: 53.1 (#38)

BenchmarkClaude 3 OpusGLM-5.3-Flash
OTIS Mock AIME 2024-20254.7%93.9%
LMArena Math12731499
FrontierMath (Tiers 1-3)—55.8%
FrontierMath Tier 4—17.1%
ProofBench—21%
LiveBench Math43.6%—
MATH Level 537.5%—

Knowledge GLM-5.3-Flash leads

Claude 3 Opus: 24.5 (#262), GLM-5.3-Flash: 58.4 (#33)

BenchmarkClaude 3 OpusGLM-5.3-Flash
GPQA Diamond47.2%90.2%
LMArena Expert12231512
SimpleQA Verified12.6%—
Confabulations22.7%—
MMLU84.6%—

Multimodal GLM-5.3-Flash leads

Claude 3 Opus: 26.6 (#112), GLM-5.3-Flash: 42.6 (#25)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Vision10231304

Multilingual GLM-5.3-Flash leads

Claude 3 Opus: 41.6 (#202), GLM-5.3-Flash: 56.2 (#24)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Non-English12581462
LMArena Chinese12481529
LMArena French12741495
LMArena German12581457
LMArena Japanese12041420
LMArena Korean11871443
LMArena Russian12801472
LMArena Spanish12461471

Instruction Following GLM-5.3-Flash leads

Claude 3 Opus: 64.3 (#223), GLM-5.3-Flash: 77.8 (#17)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Instruction Following12481480
LiveBench Instruction Following63.9%—

Long Context GLM-5.3-Flash leads

Claude 3 Opus: 38.2 (#197), GLM-5.3-Flash: 45.3 (#41)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Longer Query12591479

Writing & Preference GLM-5.3-Flash leads

Claude 3 Opus: 47.4 (#208), GLM-5.3-Flash: 65.4 (#49)

BenchmarkClaude 3 OpusGLM-5.3-Flash
LMArena Text12621471
LMArena Creative Writing12351440
LMArena Multi-Turn12751471
LiveBench Language50.4%—

Frequently asked questions

Is Claude 3 Opus better than GLM-5.3-Flash?

GLM-5.3-Flash is the stronger model overall, scoring 49.6 to 29.3 on the Noometry Index.

Is Claude 3 Opus or GLM-5.3-Flash better for coding?

GLM-5.3-Flash scores higher on coding benchmarks: 53.7 versus 32.4 in the Noometry coding category.

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

22 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and GLM-5.3-Flash has 36.

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