Claude Fable 5 vs GLM 5.1
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
50evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5 Anthropic | 17.4% | 71.8% | 90.0% | 1933elo | 83 | 56.3% | 92.6% | 55.5% | 63.5% | 81.4% | 78.6% | 80.0% | 59.9% | 88.5% | 93.9% | 87.3% | 56.1% | 88.5% | 95.0% | 60.2% | 76.9% | 62.9% | 66.0% | 90.4% | 98.5% | - | - | 83.9% | 38.6% | 1340elo | 78.0% | 29.3% | - | - | 29.8% | 1932elo | - | 66.0% | 13.3% | - | - | 68.9% | 85.0% | 51.9% | - | - | 80.3% | 88.0% | - | 74.2% | 69.4% |
| GLM 5.1 Zai | 35.9% | 64.5% | 40.0% | 1589elo | 73.5 | 44.8% | 83.9% | 27.9% | 52.0% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 41.6% | 72.3% | 22.2% | 36.1% | 71.2% | 35.6% | 52.5% | 31.5% | 97.1% | 20.8% | 1.13 | - | - | - | - | - | 33.5% | 34.7% | - | - | 15.1% | - | - | 67.0% | 85.4% | - | - | - | 34.6% | 5.24 | - | - | 69.8 | - | 53.6% |
2 / 2 models
| Attribute | Claude Fable 5 Anthropic | GLM 5.1 Zai |
|---|---|---|
| Description | Claude Fable 5 is Anthropic's most capable widely released model, built for the most demanding reasoning and long-horizon agentic work. Shares its base model with the invitation-only Claude Mythos 5. | GLM-5.1 is an AI model from Zai, released with open weights. |
| Family | Claude | Glm |
| Params | - | - |
| Open weights | closed | open |
| License | - | mit |
| Released | 9 Jun 2026 | 7 Apr 2026 |
| Context | 1,000,000 | 204,800 |
| Input $/1M | $10.00 | $1.39 |
| Output $/1M | $50.00 | $4.40 |
| Cache read $/1M | $1.000 | $0.234 |
| Cache write $/1M | $12.500 | - |
| Speed | 66 tok/s | 0 tok/s |
| Latency | 49.62 s | 0.00 s |
| Modalities | text, image, file | text |
| Providers | - | - |
| Publisher | Anthropic | Zai |
| Reported scores | Finance Agent (v2)56.3% IFBench63.5% (AA) Swebenchpro80.3% LiveBench - Math93.9% (LiveBench) LiveBench - Coding78.6% (LiveBench) | IFBench52.0% (AA) τ²-bench (Tau²-bench)97.1% (AA) Terminal-Bench (Hard)35.6% (AA) Vals Index52.5% Vibe Code Bench v1.131.5% |
FAQ
- Is Claude Fable 5 or GLM 5.1 better?
- Across the 25 benchmarks both models report on Sophon, Claude Fable 5 leads on 23 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Fable 5 and GLM 5.1 compare on GPQA Diamond?
- Claude Fable 5 scores 92.6% and GLM 5.1 scores 83.9% on GPQA Diamond.
- Which is cheaper, Claude Fable 5 or GLM 5.1?
- GLM 5.1 is cheaper at $4.40 per million output tokens against $50.00 for Claude Fable 5 - about 11.4x.
- When were Claude Fable 5 and GLM 5.1 released?
- Claude Fable 5 was released 9 Jun 2026 by Anthropic. GLM 5.1 was released 7 Apr 2026 by Zai.
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