Claude Sonnet 5.5 vs GLM-5-3 (Flagship)
A direct, empirical evaluation of Claude Sonnet 5.5 (Anthropic) against GLM-5-3 (Flagship) (Zhipu AI & THUDM).
Claude Sonnet 5.5
Developed by Anthropic · Proprietary Frontier Dynamic Hybrid Reasoner parameters
Terminal-Bench 4.0 execution (70.6%), SWE-bench Verified coding (82.4%), GitHub Copilot multi-file edits, and low-latency autonomous agentic coding at $2/$10 pricing.
GLM-5-3 (Flagship)
Developed by Zhipu AI & THUDM · 744B parameters
Complex algorithmic reasoning, multi-step code synthesis, and long-horizon tool execution.
| Metric | Claude Sonnet 5.5 | GLM-5-3 (Flagship) |
|---|---|---|
| SWE-bench Verified | 82.4% | 54.8% |
| MMLU-Pro | 88.4% | 78.4% |
| MATH-500 | 95.2% | 93.6% |
| Context Window | 1,000,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $2.00 | $0.55 |
| Output Pricing (per 1M) | $10.00 | $2.19 |