Claude Sonnet 5.5 vs GLM-5.3
Too close to call. On the work we tested, Claude Sonnet 5.5 and GLM-5.3 can't be told apart. Claude Sonnet 5.5 is the cheaper one, by 1.8×.
GrindBench-PubSec
BClaude Sonnet 5.5Anthropic70% 64–75%3.5¢ a task · 300 tasksBGLM-5.3Z.ai (Zhipu)68% 63–74%8.5¢ a task · 300 tasks
Too close to call here: their ranges overlap, so on another set of tasks the order could flip.
| Kind of work | Claude Sonnet 5.5 | GLM-5.3 |
|---|---|---|
| ATIP redaction | 25% | 16% |
| Procurement evaluation | 90% | 88% |
| Performance analysis | 72% | 69% |
| Bilingual equivalence | 85% | 95% |
GrindBench-Banking
AClaude Sonnet 5.5Anthropic80% 70–90%$0.14 a task · 60 tasksBGLM-5.3Z.ai (Zhipu)70% 58–82%$0.23 a task · 60 tasks
Too close to call here: their ranges overlap, so on another set of tasks the order could flip.
| Kind of work | Claude Sonnet 5.5 | GLM-5.3 |
|---|---|---|
| Lending & mortgages | 80% | 60% |
| AML & KYC | 80% | 60% |
| Deposits & payments | 60% | 60% |
| Complaints & conduct | 90% | 90% |
| Credit risk | 80% | 80% |
| Capital & liquidity | 90% | 70% |
Each kind of work here rests on 10 tasks per model, so a single row can easily be 20 points off. A lead of 10 points or more is in bold; read it as a hint, not a result.