Model pricing · Anthropic
Claude Fable 5.1 pricing
Claude Fable 5.1 costs $10 per million input tokens and $50 per million output tokens at list price. Best for: previous fable tier.
| Input | $10 / 1M tokens |
|---|---|
| Output | $50 / 1M tokens |
| Cached input (read) | $0.25 / 1M tokens |
| Cache write | $12.5 / 1M tokens |
| Context window | 1,000,000 tokens |
Cache hits bill at 0.025x input, not the usual 0.1x. Mythos 5.1 lists at the same prices.
Source: Anthropic pricing, cross-checked against models.dev on 2026-11-13. Your provider invoice is authoritative.
What it costs in practice
| Workload | List price | If input is cached |
|---|---|---|
| One request: 10,000 tokens in, 1,000 out | $0.150 | $0.052 |
| A month of that request, 100 times a day | $450.00 | $157.50 |
| A 3,000-token instruction file on 100 requests a day, for a month | $90.00 | $2.25 |
The last row is the always-on cost of an instruction file like CLAUDE.md: paid on every request, whether the task needs it or not. Check how much of yours is waste.
Similarly priced models
Claude Fable 5
$10 in · $50 out · Anthropic
Claude Fable 5.2
$8 in · $40 out · Anthropic
Claude Opus 5
$5 in · $25 out · Anthropic
Claude Opus 4.8
$5 in · $25 out · Anthropic
Compare every model side by side or price your own workload.