Noometry

Model comparison

Claude Opus 4.1 vs GLM-5.3

GLM-5.3 is the stronger model overall, scoring 54.8 to 41.0 on the Noometry Index.

Last verified . 29 shared benchmarks.

Claude Opus 4.1 Anthropic

41.0

Rank #142 Confirmed

GLM-5.3 Z.ai (Zhipu)

54.8

Rank #26 Confirmed

Summary

  • They share 29 benchmarks with published results for both. Claude Opus 4.1 scores higher in 0 categories and GLM-5.3 in 9 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where GLM-5.3 leads 62.3 to 22.3.
  • The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 12.6% for Claude Opus 4.1 and 68.8% for GLM-5.3.
  • GLM-5.3 is cheaper at $1.40 / $4.40 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
  • GLM-5.3 accepts more context: 1M tokens versus 200K.
  • GLM-5.3 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.1GLM-5.3
ProviderAnthropicZ.ai (Zhipu)
Noometry Index41.054.8
Released2025-08-052026-08-14
WeightsProprietaryOpen
Context window200K1M
Max output32K131K
Input $ / M tokens$15$1.40
Output $ / M tokens$75$4.40
Results tracked4842

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Category by category

Coding GLM-5.3 leads

Claude Opus 4.1: 44.4 (#73), GLM-5.3: 59.5 (#14)

BenchmarkClaude Opus 4.1GLM-5.3
LMArena WebDev13901622
WeirdML45.9%75.4%
LMArena Coding14791496
ALE-Bench674.771,317
SWE-bench Verified73.3%—
DeepSWE—69%
FrontierCode—40.1%
CursorBench—42.6%
FrontierSWE—30.2%
SciCode—59%
AlgoTune1.34—

Agentic & Tool Use GLM-5.3 leads

Claude Opus 4.1: 35.0 (#41), GLM-5.3: 36.4 (#38)

BenchmarkClaude Opus 4.1GLM-5.3
Terminal-Bench38%—
APEX-Agents—56.6%
GDPval43.6%—
Cybench42%—
DeepResearch Bench48.3%—
LMArena Search1148—
METR Time Horizons66.8%—
Vending-Bench 2—8,164

Reasoning GLM-5.3 leads

Claude Opus 4.1: 32.2 (#76), GLM-5.3: 46.1 (#46)

BenchmarkClaude Opus 4.1GLM-5.3
Chess Puzzles7%21%
LMArena Hard Prompts14431489
Mystery Game Puzzles21%33%
DTBench80%87.7%
LMCA37.1%55.5%
Epoch Capabilities Index144.12155.61
SimpleBench60%—
NYT Connections (extended)—74.2%
CritPt—19.1%
EnigmaEval7.2%—
EBR-Bench7.9%—
Bench to the Future 3—0.15
ForecastBench62—

Math GLM-5.3 leads

Claude Opus 4.1: 22.3 (#277), GLM-5.3: 62.3 (#33)

BenchmarkClaude Opus 4.1GLM-5.3
FrontierMath (Tiers 1-3)12.6%68.8%
FrontierMath Tier 42.4%29.3%
OTIS Mock AIME 2024-202568.9%91.1%
LMArena Math14311489
ProofBench—49%
FrontierMath (Feb 2025 set)7.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge GLM-5.3 leads

Claude Opus 4.1: 42.0 (#101), GLM-5.3: 58.3 (#37)

BenchmarkClaude Opus 4.1GLM-5.3
GPQA Diamond77.3%90.9%
LMArena Expert14391516
Humanity's Last Exam11.5%—
SimpleQA Verified—41%
Confabulations17.1%—
Vectara Hallucination Rate11.8%—

Multimodal Not comparable

Claude Opus 4.1: 26.8 (#119), GLM-5.3: —

BenchmarkClaude Opus 4.1GLM-5.3
VPCT35%—

Multilingual GLM-5.3 leads

Claude Opus 4.1: 52.0 (#95), GLM-5.3: 55.7 (#28)

BenchmarkClaude Opus 4.1GLM-5.3
LMArena Non-English14051457
LMArena Chinese14271528
LMArena French14311499
LMArena German14131499
LMArena Japanese13781453
LMArena Korean13801472
LMArena Russian14221463
LMArena Spanish14481460

Instruction Following GLM-5.3 leads

Claude Opus 4.1: 75.6 (#58), GLM-5.3: 77.5 (#23)

BenchmarkClaude Opus 4.1GLM-5.3
LMArena Instruction Following14351477

Long Context Too close to call

Claude Opus 4.1: 44.5 (#63), GLM-5.3: 45.4 (#41)

BenchmarkClaude Opus 4.1GLM-5.3
LMArena Longer Query14551482

Writing & Preference GLM-5.3 leads

Claude Opus 4.1: 62.4 (#74), GLM-5.3: 75.7 (#6)

BenchmarkClaude Opus 4.1GLM-5.3
LMArena Text14191471
LMArena Creative Writing14121457
LMArena Multi-Turn14441472
Short-Story Creative Writing84.7%—
EQ-Bench Creative Writing—2075

Frequently asked questions

Is Claude Opus 4.1 better than GLM-5.3?

GLM-5.3 is the stronger model overall, scoring 54.8 to 41.0 on the Noometry Index.

Which is cheaper, Claude Opus 4.1 or GLM-5.3?

GLM-5.3 is cheaper. It lists at $1.40 per million input tokens and $4.40 per million output tokens; Claude Opus 4.1 lists at $15 and $75.

Is Claude Opus 4.1 or GLM-5.3 better for coding?

GLM-5.3 scores higher on coding benchmarks: 59.5 versus 44.4 in the Noometry coding category.

Which has the bigger context window?

GLM-5.3 does, with 1M tokens against 200K.

How many benchmarks do Claude Opus 4.1 and GLM-5.3 share?

29 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and GLM-5.3 has 42.

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