Comparing 2 models
Claude Fable 5.1 vs GLM 5.2
Benchmarks through
Verdict
Claude Fable 5.1 places higher on 2 of the 2 tasks where both are ranked. GLM 5.2 costs 293.3x less per input token. GLM 5.2 accepts 1.0x more context. Only GLM 5.2 has open weights for self-hosting.
- Choose Claude Fable 5.1 for AI Agents (#3), Code Completion (#3).
- 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 Fable 5.1 | GLM 5.2 | Source |
|---|---|---|---|
| Design Arena Coding | 1336 Elo | 1287 Elo | source · 2026-10-23 |
| Design Arena Full-stack Agent | 1326 Elo | 1241 Elo | source · 2026-10-22 |
| Design Arena UI | 1336 Elo | 1294 Elo | source · 2026-10-23 |
| Design Arena Web-app Agent | 1318 Elo | 1222 Elo | source · 2026-10-23 |
| Design Arena Website | 1313 Elo | 1285 Elo | source · 2026-10-23 |
| FrontierMath Tiers 1-3 (Epoch AI) | 90.2% ± 1.8 | 59.2% ± 3 | source · 2026-09-01 |
| LiveBench Agentic Coding | 66.1% | 51.8% | source · 2026-10-18 |
| LiveBench Coding | 86.4% | 79.7% | source · 2026-10-18 |
| LiveBench Data Analysis | 80.3% | 73.7% | source · 2026-10-18 |
| LiveBench Instruction Following | 73.0% | 62.3% | source · 2026-10-18 |
| LiveBench Language | 89.5% | 76.2% | source · 2026-10-18 |
| LiveBench Math | 97.0% | 89.8% | source · 2026-10-18 |
| LiveBench Reasoning | 91.7% | 78.6% | source · 2026-10-18 |
| LMArena Agent | 14.2 | 2.1 | source · 2026-10-20 |
| LMArena Agent Bash Recovery | 11.6 | 0.7 | source · 2026-10-08 |
| LMArena Agent Steerability | 14.8 | 1.3 | source · 2026-10-20 |
| LMArena Agent Task Outcome | 14.9 | 3.8 | source · 2026-10-20 |
| LMArena Agent Tool Hallucination | 0.6 | 0.7 | source · 2026-10-20 |
| LMArena Creative Writing | 1510 Elo | 1462 Elo | source · 2026-10-22 |
| LMArena Instruction Following | 1519 Elo | 1466 Elo | source · 2026-10-22 |
| LMArena Long Query | 1524 Elo | 1479 Elo | source · 2026-10-22 |
| LMArena Math | 1532 Elo | 1484 Elo | source · 2026-10-22 |
| LMArena Text | 1503 Elo | 1475 Elo | source · 2026-10-22 |
| LMArena Text Factuality | 1499 Elo | 1463 Elo | source · 2026-10-22 |
| LMArena WebDev | 1743 Elo | 1604 Elo | source · 2026-10-22 |
| OTIS Mock AIME (Epoch AI) | 100% ± 0 | 86.4% ± 4.2 | source · 2026-09-01 |
| SimpleQA Verified (Epoch AI) | 70.8% ± 1.4 | 34.2% ± 1.5 | source · 2026-09-01 |
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.