Claude Fable 5.1 vs Claude Opus 4 (latest)
Claude Fable 5.1 is cheaper on output tokens, while Claude Fable 5.1 offers a larger context window. Choose Claude Fable 5.1 or Claude Opus 4 (latest) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Fable 5.1 | Claude Opus 4 (latest) |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input / 1M tokens | $10.00 | $15.00 |
| Output / 1M tokens | $50.00 | $75.00 |
| Context window | 1M | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2026 | May 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.