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Claude Fable 5 vs GLM-5.3
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| Attribute | Claude Fable 5 | GLM-5.3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 163 | 155 |
| Coding | 91 | 90 |
| Math | 91 | 44 |
| Reasoning & Knowledge | 86 | 67 |
| Agentic & Tools | 92 | 79 |
| Specifications | ||
| Developer | Anthropic | Z.ai (Zhipu AI) |
| Family | Claude | — |
| Released | Jun 9, 2026 | Aug 14, 2026 |
| Parameters | — | 744B |
| Availability | API access | API access |
| Context window | 1M | 1M |
| Price — $/M input | $10.00 | $0.06 |
| Price — $/M output | $50.00 | $2.86 |
| Inputs | text, image, file | text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 91% |
| APEX | 64% | 57% |
| ARC-AGI | 99% | — |
| ARC-AGI-2 | 89% | — |
| GPQA Diamond | 86% | 91% |
| GSO (code optimization) | 78% | — |
| Humanity's Last Exam | 56% | 42% |
| SciCode | 61% | 59% |
| SimpleBench | 82% | — |
| SimpleQA Verified | 71% | 41% |
| WebDev Arena | 1628 | 1614 |
| WeirdML | 92% | 75% |
| τ²-bench | 99% | — |
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.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.