Noometry

Model comparison

GLM-5.1 vs GPT-4.5

GLM-5.1 is the stronger model overall, scoring 47.6 to 36.9 on the Noometry Index.

Last verified . 22 shared benchmarks.

GLM-5.1 Z.ai (Zhipu)

47.6

Rank #51 Confirmed

GPT-4.5 OpenAI

36.9

Rank #200 Confirmed

Summary

  • They share 22 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and GPT-4.5 in 1 category; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GLM-5.1 leads 38.2 to 14.1.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 93.3% for GLM-5.1 and 37.8% for GPT-4.5.
  • GLM-5.1 has downloadable open weights; the other is API-only.

Side by side

GLM-5.1GPT-4.5
ProviderZ.ai (Zhipu)OpenAI
Noometry Index47.636.9
Released2026-04-072025-02-27
WeightsOpenProprietary
Context window200K—
Max output131K—
Input $ / M tokens$1.40—
Output $ / M tokens$4.40—
Results tracked4142

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Category by category

Coding GLM-5.1 leads

GLM-5.1: 48.5 (#52), GPT-4.5: 41.8 (#102)

BenchmarkGLM-5.1GPT-4.5
WeirdML57.1%39.4%
LMArena Coding14861397
SWE-bench Verified74.2%—
Aider Polyglot—44.9%
LMArena WebDev1509—
SciCode43.8%—
LiveBench Coding—75.2%
ALE-Bench887.1—

Agentic & Tool Use GPT-4.5 leads

GLM-5.1: 24.8 (#106), GPT-4.5: 27.6 (#92)

BenchmarkGLM-5.1GPT-4.5
APEX-Agents40.9%—
Cybench—17.5%
ExploitBench18.1%—
GBAEval0%—
Vending-Bench 25,634—

Reasoning GLM-5.1 leads

GLM-5.1: 38.2 (#57), GPT-4.5: 14.1 (#320)

BenchmarkGLM-5.1GPT-4.5
SimpleBench55.1%34.5%
LMArena Hard Prompts14721404
Epoch Capabilities Index149.86136.74
ARC-AGI-2—0.8%
NYT Connections (extended)77.7%—
ARC-AGI-1—10.3%
CritPt4.6%—
Chess Puzzles19%—
EnigmaEval—3.2%
Thematic Generalization69.8%—
LiveBench Reasoning—71.1%
LiveBench Data Analysis—64.3%
ForecastBench—61.7
LiveBench—69%

Math GLM-5.1 leads

GLM-5.1: 49.0 (#48), GPT-4.5: 31.0 (#200)

BenchmarkGLM-5.1GPT-4.5
OTIS Mock AIME 2024-202593.3%37.8%
LMArena Math14721412
FrontierMath (Tiers 1-3)36.8%—
MathArena Final-Answer Competitions67.1%—
ProofBench22.2%—
LiveBench Math—69.3%
MATH Level 5—78.6%
FrontierMath (Feb 2025 set)33.4%—
FrontierMath Tier 4 (v1)12.5%—

Knowledge GLM-5.1 leads

GLM-5.1: 55.0 (#45), GPT-4.5: 32.4 (#205)

BenchmarkGLM-5.1GPT-4.5
GPQA Diamond89.9%68.7%
LMArena Expert14771394
Humanity's Last Exam—5.4%
SimpleQA Verified34%—
Confabulations—13.6%

Multimodal Not comparable

GLM-5.1: —, GPT-4.5: 37.0 (#68)

BenchmarkGLM-5.1GPT-4.5
LMArena Vision—1195
VPCT—45%

Multilingual GLM-5.1 leads

GLM-5.1: 55.2 (#34), GPT-4.5: 52.7 (#78)

BenchmarkGLM-5.1GPT-4.5
LMArena Non-English14481413
LMArena Chinese15161421
LMArena French14781417
LMArena German14661457
LMArena Japanese14361416
LMArena Korean14231392
LMArena Russian14531419
LMArena Spanish1467—

Instruction Following GLM-5.1 leads

GLM-5.1: 76.5 (#41), GPT-4.5: 72.8 (#129)

BenchmarkGLM-5.1GPT-4.5
LMArena Instruction Following14511404
LiveBench Instruction Following—72.3%

Long Context GLM-5.1 leads

GLM-5.1: 44.9 (#51), GPT-4.5: 40.4 (#150)

BenchmarkGLM-5.1GPT-4.5
LMArena Longer Query14671406
Fiction.LiveBench—63.9%

Writing & Preference GLM-5.1 leads

GLM-5.1: 67.2 (#29), GPT-4.5: 57.1 (#129)

BenchmarkGLM-5.1GPT-4.5
LMArena Text14621417
LMArena Creative Writing14541394
EQ-Bench Creative Writing15921258
LMArena Multi-Turn14731444
Short-Story Creative Writing—75.6%
LiveBench Language—61.5%

Frequently asked questions

Is GLM-5.1 better than GPT-4.5?

GLM-5.1 is the stronger model overall, scoring 47.6 to 36.9 on the Noometry Index.

Is GLM-5.1 or GPT-4.5 better for coding?

GLM-5.1 scores higher on coding benchmarks: 48.5 versus 41.8 in the Noometry coding category.

How many benchmarks do GLM-5.1 and GPT-4.5 share?

22 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and GPT-4.5 has 42.

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