Claude Fable 5 vs Claude Fable 5.1
Claude Fable 5 (Anthropic) versus Claude Fable 5.1 (Anthropic): API pricing, context window, capabilities and uptime, from the same data as each model page, at the KumoAPI default channel price. Input costs 10 Credits / M for Claude Fable 5 and 10 Credits / M for Claude Fable 5.1. Context windows are 1M and 1M.
Claude Fable 5claude-fable-5Claude Fable 5.1claude-fable-5-1Specs side by side
| Item | Claude Fable 5claude-fable-5 | Claude Fable 5.1claude-fable-5-1 |
|---|---|---|
| Input (prompt) · Credits / M | 10 | 10 |
| Output (completion) · Credits / M | 50 | 50 |
| Cache read · Credits / M | 1 | 0.25 |
| Context window | 1M | 1M |
| Max output | 128K | 128K |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | — | — |
| Protocols | Anthropic Messages | Anthropic Messages |
| Sample monthly cost (10M in + 2M out) | 200 | 200 |
Prices are the KumoAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from KumoAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which has the larger context window, Claude Fable 5 or Claude Fable 5.1?
Claude Fable 5 offers 1M tokens, Claude Fable 5.1 offers 1M tokens.
Can I switch between Claude Fable 5 and Claude Fable 5.1 at any time?
Yes. KumoAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of Claude Fable 5 and Claude Fable 5.1 differ?
Only Claude Fable 5.1: Response Schema, Web Search. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both Claude Fable 5 and Claude Fable 5.1
Free credits on sign-up, pay as you go, no monthly fee.