Claude Fable 5.1 API price, and what each result really costs
Anthropic, listed 1 Sept 2026. Price checked 12 Nov 2026; unchanged since we started tracking it. Source: Anthropic's pricing page. anthropic/claude-fable-5.1
List price per million tokens
- Input
- $10.00
- Cached input
- $0.25
- Output
- $50.00
- Context window
- 1M tokens
Note: Cache hits priced at 0.025x input. Cache writes: 5m $12.50, 1h $20. Batch 50% off. Predecessor Claude Fable 5 (still offered) has the same $10/$50 price but $1 cache hits.
What it costs per task, and per task that works
Six common task shapes with typical token counts. The real cost counts the tries that get redone; the rates are examples, not measurements.
| Task | Per 1,000 tries | Per 1,000 that work, 8 in 10 | Per 1,000 that work, 6 in 10 | Per 1,000 that work, 4 in 10 |
|---|---|---|---|---|
| Support bot answer3,000 in / 300 out | $45.00 | $56.25 | $75.00 | $112.50 |
| Invoice field extraction2,500 in / 250 out | $37.50 | $46.88 | $62.50 | $93.75 |
| Lead scoring1,200 in / 100 out | $17.00 | $21.25 | $28.33 | $42.50 |
| Email reply draft1,500 in / 400 out | $35.00 | $43.75 | $58.33 | $87.50 |
| Translation900 in / 800 out | $49.00 | $61.25 | $81.67 | $122.50 |
| Search re-ranking4,000 in / 50 out | $42.50 | $53.13 | $70.83 | $106.25 |
Work out your own real cost per resultTest Claude Fable 5.1 on your own prompt
Compare Claude Fable 5.1 with
- Claude Fable 5.2$8.00 in / $40.00 outSwitch cost
- Claude Opus 5$5.00 in / $25.00 outSwitch cost
- GPT-6 Astra$10.00 in / $50.00 outSwitch cost
- GPT-5.5$5.00 in / $30.00 outSwitch cost
- GPT-5.6 Sol$4.00 in / $20.00 outSwitch cost
Questions
How much does the Claude Fable 5.1 API cost?
$10.00 per million input tokens and $50.00 per million output tokens, or $0.25 per million for cached input. Price checked 12 Nov 2026; unchanged since we started tracking it.
What does a result that works really cost with Claude Fable 5.1?
A support bot answer (about 3,000 tokens in, 300 out) costs $0.045 per try. If 6 in 10 work first time, each answer that works really costs $0.075, because the redone ones were paid for too.