Claude Fable 5.1 vs Claude Fable 5
Claude Fable 5.1 is the cheaper option on input; Claude Fable 5.1 is cheaper on output. Figures below are per million tokens, from vendor pricing cited in our reporting.
| Claude Fable 5.1 | Claude Fable 5 | |
|---|---|---|
| Input per 1M tokens | $10 | $10 |
| Output per 1M tokens | $50 | $50 |
| Cached input per 1M | $0.25 | $1 |
| Context window | — | 1M tokens |
| Parameters | — | — |
| Licence | proprietary | |
| Benchmark | — | — |
| Vendor | Anthropic | Anthropic |
| Released | 14 Sept 2026 | — |
What the numbers say
- Input price gap: 0% ($10 vs $10).
- Blended three-to-one input/output rate: $80.00 for Claude Fable 5.1, $80.00 for Claude Fable 5.
- Context: — against 1M tokens.
- Licence: Claude Fable 5.1 is proprietary; Claude Fable 5 is .
Sources
Claude Fable 5.1 specs · Claude Fable 5 specs · Full price index