Noometry

Model comparison

Claude Fable 5.1 vs GLM-4.5V

Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 39.2 on the Noometry Index. GLM-4.5V costs 22× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Last verified . 14 shared benchmarks.

Claude Fable 5.1 Anthropic

68.5

Rank #2 Confirmed

GLM-4.5V Z.ai (Zhipu)

39.2

Rank #158 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Fable 5.1 scores higher in 9 categories and GLM-4.5V in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5.1 leads 89.5 to 34.7.
  • GLM-4.5V is cheaper at $0.60 / $1.80 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.
  • Claude Fable 5.1 accepts more context: 1M tokens versus 64K.
  • GLM-4.5V has downloadable open weights; the other is API-only.

Side by side

Claude Fable 5.1GLM-4.5V
ProviderAnthropicZ.ai (Zhipu)
Noometry Index68.539.2
Released2026-09-012025-08-11
WeightsProprietaryOpen
Context window1M64K
Max output128K16K
Input $ / M tokens$10$0.60
Output $ / M tokens$50$1.80
Results tracked5015

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Category by category

Coding Claude Fable 5.1 leads

Claude Fable 5.1: 70.5 (#2), GLM-4.5V: 38.9 (#152)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Coding15231347
FrontierCode50.9%—
CursorBench51.8%—
LMArena WebDev1753—
FrontierSWE56.3%—
SciCode63.1%—
WeirdML92.9%—
MirrorCode73.3%—
ALE-Bench2,143—

Agentic & Tool Use Not comparable

Claude Fable 5.1: 50.8 (#5), GLM-4.5V: —

BenchmarkClaude Fable 5.1GLM-4.5V
APEX-Agents68.6%—
Remote Labor Index17.9%—
GDP.pdf29.6%—
Vending-Bench 25,422—

Reasoning Claude Fable 5.1 leads

Claude Fable 5.1: 76.7 (#5), GLM-4.5V: 26.5 (#118)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Hard Prompts15261335
ARC-AGI-290%—
Kagi LLM Benchmark—59.8%
NYT Connections (extended)90%—
ARC-AGI-197.5%—
CritPt31.1%—
Chess Puzzles47%—
EBR-Bench57.1%—
Mystery Game Puzzles58%—
DTBench97.6%—
LMCA65.5%—
Epoch Capabilities Index165—

Math Claude Fable 5.1 leads

Claude Fable 5.1: 89.5 (#3), GLM-4.5V: 34.7 (#157)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Math15191353
FrontierMath (Tiers 1-3)90.2%—
FrontierMath Tier 487.8%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
FrontierMath Erdős0%—

Knowledge Claude Fable 5.1 leads

Claude Fable 5.1: 69.3 (#5), GLM-4.5V: 36.8 (#155)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Expert15281353
Humanity's Last Exam46.5%—
SimpleQA Verified70.8%—

Multimodal Claude Fable 5.1 leads

Claude Fable 5.1: 54.1 (#4), GLM-4.5V: 33.6 (#86)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Vision13191154
Blueprint-Bench 241.9%—
Furniture Assembly70%—
LMArena Document1513—

Multilingual Claude Fable 5.1 leads

Claude Fable 5.1: 59.5 (#2), GLM-4.5V: 44.9 (#172)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Non-English15091304
LMArena Chinese15891338
LMArena Russian15251299
LMArena Spanish15031335
LMArena French1532—
LMArena German1495—
LMArena Japanese1565—

Instruction Following Claude Fable 5.1 leads

Claude Fable 5.1: 79.3 (#6), GLM-4.5V: 69.4 (#170)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Instruction Following15151311

Long Context Claude Fable 5.1 leads

Claude Fable 5.1: 46.8 (#19), GLM-4.5V: 39.6 (#166)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Longer Query15241305

Writing & Preference Claude Fable 5.1 leads

Claude Fable 5.1: 79.3 (#1), GLM-4.5V: 52.7 (#162)

BenchmarkClaude Fable 5.1GLM-4.5V
LMArena Text15111333
LMArena Creative Writing15071295
LMArena Multi-Turn14921333
EQ-Bench Creative Writing2162—

Frequently asked questions

Is Claude Fable 5.1 better than GLM-4.5V?

Claude Fable 5.1 is the stronger model overall, scoring 68.5 to 39.2 on the Noometry Index. GLM-4.5V costs 22× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Which is cheaper, Claude Fable 5.1 or GLM-4.5V?

GLM-4.5V is cheaper. It lists at $0.60 per million input tokens and $1.80 per million output tokens; Claude Fable 5.1 lists at $10 and $50.

Is Claude Fable 5.1 or GLM-4.5V better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 70.5 versus 38.9 in the Noometry coding category.

Which has the bigger context window?

Claude Fable 5.1 does, with 1M tokens against 64K.

How many benchmarks do Claude Fable 5.1 and GLM-4.5V share?

14 benchmarks have published results for both models. Claude Fable 5.1 has 50 scored results on Noometry and GLM-4.5V has 15.

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