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Claude Fable 5 vs Claude Opus 5
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| Attribute | Claude Fable 5 | Claude Opus 5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 161 | 159 |
| Coding | 100 | 93 |
| Math | 94 | 93 |
| Reasoning & Knowledge | 95 | 92 |
| Agentic & Tools | 97 | 95 |
| Specifications | ||
| Developer | Anthropic | Anthropic |
| Family | Claude | Claude |
| Released | Jun 9, 2026 | Jul 24, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1M | 1M |
| Price — $/M input | $10.00 | $5.00 |
| Price — $/M output | $50.00 | $25.00 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 99% |
| APEX | 45% | 44% |
| GPQA Diamond | 93% | 94% |
| Humanity's Last Exam | 53% | 53% |
| SciCode | 60% | 56% |
| SimpleBench | 82% | — |
| SimpleQA Verified | 68% | 57% |
| WebDev Arena | 1654 | — |
| WeirdML | 88% | — |
| τ²-bench | 99% | — |
| ARC-AGI | — | 98% |
| ARC-AGI-2 | — | 88% |
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.