Claude Fable 5.1 vs GLM 5.2
Claude Fable 5.1 
GLM 5.2 Verdict
- Claude Fable 5.1 (max) leads on quality: 70.1 vs 57.7.
- Claude Fable 5.1 (max) is stronger in agents & tools, coding, composite, human preference, knowledge, maths, reasoning.
- GLM 5.2 (max) is 9.3× cheaper ($2.15 vs $20.00 per 1M blended).
| Metric | Claude Fable 5.1 (max) | GLM 5.2 (max) |
|---|---|---|
| BenchLeader Index | 70.1 | 57.7 |
| Agents & tools score | 67.2 | 56.9 |
| Coding score | 78.1 | 63.8 |
| Composite score | 76.6 | – |
| Human preference score | 70.8 | 67.3 |
| Knowledge score | 75.9 | 44.8 |
| Maths score | 77.0 | 55.8 |
| Reasoning score | 71.8 | 66.8 |
| Blended price $/M | $20.00 | $2.15 |
| Output speed | 67 tok/s | 75 tok/s |
| Time to first answer | 258.6 s | 34.2 s |
| Context window | 1M | 1M |
| GPQA Diamond | – | 91.9% |
| FrontierMath Tiers 1–3 | 90.2% | 59.2% |
| FrontierMath Tier 4 | 87.8% | 29.3% |
| OTIS Mock AIME | 100.0% | 86.4% |
| SWE-bench Verified (Epoch) | – | 78.7% |
| SimpleQA Verified | 70.8% | 34.2% |
| Terminal-Bench | 57.9% | – |
| SciCode | 62.0% | 50.5% |
| WeirdML | 92.9% | 70.1% |
| ProofBench | 100.0% | 35.0% |
| LMArena Text | 1501 | 1472 |
| LMArena Hard Prompts | 1519 | 1493 |
| LMArena Coding | 1519 | 1510 |
| LMArena WebDev | 1758 | 1592 |
| LMArena Agent | 13.9 | 4.6 |
| LiveBench | 83.4% | – |
| LiveBench Reasoning | 91.7% | – |
| LiveBench Coding | 86.4% | – |
| LiveBench Agentic Coding | 66.1% | – |
| LiveBench Mathematics | 97.0% | – |
| LiveBench Data Analysis | 80.3% | – |
| LiveBench Language | 89.5% | – |
| Terminal-Bench 2.1 (Vals) | – | 67.8% |
| SWE-bench (Vals) | – | 82.8% |
| ARC-AGI-1 | 97.5% | – |
| ARC-AGI-2 | 90.0% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
Claude Fable 5.1 vs GLM 5.2: questions
- Is Claude Fable 5.1 better than GLM 5.2?
- Claude Fable 5.1 (max) leads on quality: 70.1 vs 57.7. The BenchLeader Index combines every independent quality benchmark; Claude Fable 5.1 (max) is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is Claude Fable 5.1 better than GLM 5.2 for coding?
- Claude Fable 5.1 scores higher in coding (78 vs 64 on the category index, where 50 is average).
- Is Claude Fable 5.1 better than GLM 5.2 for agentic tasks?
- Claude Fable 5.1 scores higher in agentic tasks (67 vs 57 on the category index, where 50 is average).
- Which is cheaper, Claude Fable 5.1 or GLM 5.2?
- GLM 5.2 is cheaper: $2.15 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Fable 5.1 or GLM 5.2?
- GLM 5.2 streams faster: 75 against 67 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.