Claude Fable 5 vs GLM-4.5
Claude Fable 5 (Anthropic) and GLM-4.5 (Z.ai (Zhipu AI),Tsinghua University) compared on benchmarks, pricing, context window, and use-case rankings.
- GLM-4.5 is cheaper on input tokens — $0.60 vs $10.00 per 1M.
- Claude Fable 5 has a larger context window (1M vs 131K tokens).
- Claude Fable 5 ranks higher for coding (91th vs 19th percentile).
| Attribute | Claude Fable 5 | GLM-4.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 163 | — |
| Coding | 91 | 19 |
| Math | 91 | 13 |
| Reasoning & Knowledge | 86 | 18 |
| Agentic & Tools | 92 | 8 |
| Specifications | ||
| Developer | Anthropic | Z.ai (Zhipu AI),Tsinghua University |
| Family | Claude | — |
| Released | Jun 9, 2026 | Aug 5, 2025 |
| Parameters | — | 355B |
| Availability | API access | Open weights (unrestricted) |
| Context window | 1M | 131K |
| Price — $/M input | $10.00 | $0.60 |
| Price — $/M output | $50.00 | $2.20 |
| Inputs | text, image, file | text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 74% |
| APEX | 64% | — |
| ARC-AGI | 99% | — |
| ARC-AGI-2 | 89% | — |
| GPQA Diamond | 86% | 78% |
| GSO (code optimization) | 78% | — |
| Humanity's Last Exam | 56% | 8% |
| SciCode | 61% | 35% |
| SimpleBench | 82% | — |
| SimpleQA Verified | 71% | — |
| WebDev Arena | 1628 | — |
| WeirdML | 92% | 41% |
| τ²-bench | 99% | 43% |
| LiveCodeBench | — | 74% |
| MMLU-Pro | — | 84% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Which is cheaper, Claude Fable 5 or GLM-4.5?
GLM-4.5 is cheaper on input tokens at $0.60 per million, versus $10.00 (representative OpenRouter pricing).
Which has a larger context window, Claude Fable 5 or GLM-4.5?
Claude Fable 5 supports up to 1M tokens, compared with 131K for the other.
Which is better for coding, Claude Fable 5 or GLM-4.5?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Claude Fable 5 ranks higher — 91th vs 19th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.