Claude Opus 5.5 vs GLM-5.2
27 SHARED BENCHMARKSAcross 27 shared benchmarks, Claude Opus 5.5 scores higher on 25 and GLM-5.2 on 2. The widest gap is ARC-AGI-2, where Claude Opus 5.5 scores 91.7 against 22.8. GLM-5.2 is the cheaper of the two on tracked API pricing ($1.40 against $4.00 per million input tokens).
At a glance
Release dates: the vendor's own announcement for Claude Opus 5.5; Artificial Analysis for GLM-5.2. Prices: Anthropic's own price page for Claude Opus 5.5; Z.ai's own price page for GLM-5.2. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
Claude Opus 5.5 pulls furthest ahead on
- ARC-AGI-291.7 vs 22.8
- AA-Omniscience · Accuracy66.2 vs 24.3
- GDPVal67.3 vs 42.9
GLM-5.2 pulls furthest ahead on
- AA-Omniscience · Non-hallucination73.7 vs 41.4
- AA IT-Bench SRE42.7 vs 38.2
Every shared benchmark27 · grouped by area
Reasoning 5
Coding 5
Agentic 3
Factuality 2
Instruction Following 1
Long Context 1
Math 1
Other shared benchmarks 9
Each score is the one the model's own page shows — the most authoritative tracked result for that benchmark, on the benchmark's standard methodology (source-attributed). ↓ marks lower-is-better metrics; ◆ an independently verified score. Open either model for its full surface, provenance and pricing. Quoted rates are the price-setter row we currently track for each model — its direct or vendor-official listing where one exists (anthropic-official, zai-official), otherwise the lowest tracked offer.