Noometry

Model comparison

Claude Opus 5.5 vs GLM-4.5V

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 39.8 on the Noometry Index. GLM-4.5V costs 8.9× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Last verified . 14 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

GLM-4.5V Z.ai (Zhipu)

39.8

Rank #158 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Opus 5.5 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 Opus 5.5 leads 91.8 to 37.4.
  • GLM-4.5V is cheaper at $0.60 / $1.80 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
  • Claude Opus 5.5 accepts more context: 1M tokens versus 64K.
  • GLM-4.5V has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5GLM-4.5V
ProviderAnthropicZ.ai (Zhipu)
Noometry Index68.639.8
Released2026-09-222025-08-11
WeightsProprietaryOpen
Context window1M64K
Max output128K16K
Input $ / M tokens$4$0.60
Output $ / M tokens$20$1.80
Results tracked4415

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), GLM-4.5V: 39.5 (#155)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Coding15471347
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), GLM-4.5V: —

BenchmarkClaude Opus 5.5GLM-4.5V
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), GLM-4.5V: 27.4 (#119)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Hard Prompts15351334
ARC-AGI-293.3%—
Kagi LLM Benchmark—59.8%
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
Epoch Capabilities Index167.33—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), GLM-4.5V: 37.4 (#159)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Math15061354
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), GLM-4.5V: 37.5 (#156)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Expert15471353
GPQA Diamond90.6%—
SimpleQA Verified72.2%—

Multimodal Claude Opus 5.5 leads

Claude Opus 5.5: 57.8 (#1), GLM-4.5V: 34.3 (#92)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Vision13211154
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), GLM-4.5V: 44.6 (#177)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Non-English15071303
LMArena Chinese15881337
LMArena Russian15201298
LMArena Spanish15071336
LMArena French1514—

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), GLM-4.5V: 69.2 (#175)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Instruction Following15371311

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), GLM-4.5V: 39.6 (#171)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Longer Query15321304

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), GLM-4.5V: 52.5 (#170)

BenchmarkClaude Opus 5.5GLM-4.5V
LMArena Text15151333
LMArena Creative Writing15331295
LMArena Multi-Turn14991332
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than GLM-4.5V?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 39.8 on the Noometry Index. GLM-4.5V costs 8.9× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5.5 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 Opus 5.5 lists at $4 and $20.

Is Claude Opus 5.5 or GLM-4.5V better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 39.5 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 5.5 does, with 1M tokens against 64K.

How many benchmarks do Claude Opus 5.5 and GLM-4.5V share?

14 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and GLM-4.5V has 15.

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