Comparing 2 models
Claude Sonnet 5.5 vs GLM 5.2
Benchmarks through
Verdict
Claude Sonnet 5.5 places higher on 2 of the 2 tasks where both are ranked. GLM 5.2 costs 58.7x less per input token. GLM 5.2 accepts 1.0x more context. Only GLM 5.2 has open weights for self-hosting.
- Choose Claude Sonnet 5.5 for Code Completion (#1), AI Agents (#2).
- Choose GLM 5.2 for you need to self-host.
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | Claude Sonnet 5.5 | GLM 5.2 | Source |
|---|---|---|---|
| Design Arena Coding | 1365 Elo | 1287 Elo | source · 2026-10-23 |
| Design Arena UI | 1369 Elo | 1294 Elo | source · 2026-10-23 |
| Design Arena Web-app Agent | 1306 Elo | 1222 Elo | source · 2026-10-23 |
| Design Arena Website | 1327 Elo | 1285 Elo | source · 2026-10-23 |
| FrontierMath Tiers 1-3 (Epoch AI) | 88.8% ± 1.9 | 59.2% ± 3 | source · 2026-09-29 |
| GPQA Diamond (Epoch AI) | 95.6% ± 1.4 | 91.9% ± 1.6 | source · 2026-09-29 |
| LiveBench Agentic Coding | 56.3% | 51.8% | source · 2026-10-18 |
| LiveBench Coding | 91.4% | 79.7% | source · 2026-10-18 |
| LiveBench Data Analysis | 59.5% | 73.7% | source · 2026-10-18 |
| LiveBench Instruction Following | 56.8% | 62.3% | source · 2026-10-18 |
| LiveBench Language | 78.0% | 76.2% | source · 2026-10-18 |
| LiveBench Math | 96.1% | 89.8% | source · 2026-10-18 |
| LiveBench Reasoning | 91.6% | 78.6% | source · 2026-10-18 |
| LMArena Agent | 12.7 | 2.1 | source · 2026-10-20 |
| LMArena Agent Bash Recovery | 15 | 0.7 | source · 2026-10-08 |
| LMArena Agent Steerability | 10.9 | 1.3 | source · 2026-10-20 |
| LMArena Agent Task Outcome | 20.6 | 3.8 | source · 2026-10-20 |
| LMArena Agent Tool Hallucination | 0.6 | 0.7 | source · 2026-10-20 |
| LMArena Creative Writing | 1468 Elo | 1462 Elo | source · 2026-10-22 |
| LMArena Instruction Following | 1491 Elo | 1466 Elo | source · 2026-10-22 |
| LMArena Long Query | 1495 Elo | 1479 Elo | source · 2026-10-22 |
| LMArena Math | 1498 Elo | 1484 Elo | source · 2026-10-22 |
| LMArena Text | 1478 Elo | 1475 Elo | source · 2026-10-22 |
| LMArena Text Factuality | 1476 Elo | 1463 Elo | source · 2026-10-22 |
| LMArena WebDev | 1767 Elo | 1604 Elo | source · 2026-10-22 |
| OTIS Mock AIME (Epoch AI) | 100% ± 0 | 86.4% ± 4.2 | source · 2026-09-29 |
| SimpleQA Verified (Epoch AI) | 46.5% ± 1.6 | 34.2% ± 1.5 | source · 2026-09-29 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.