benchrOfficial rate card
| Billing category | USD price | Unit / condition |
|---|---|---|
| Standard input | $10.00 | Per 1M input tokens |
| Standard output | $50.00 | Per 1M output tokens |
| Cached input read | $0.25 | Per 1M cached input tokens |
| Cache write | $12.50 | Per 1M tokens, 5-minute duration |
| Cache write | $20.00 | Per 1M tokens, 1-hour duration |
| Batch input | $5.00 | Per 1M input tokens |
| Batch output | $25.00 | Per 1M output tokens |
Price the cache as a separate component
Do not replace every input token with the $0.25 cache-read number. A workload can contain non-cached input, a cache write, later cache reads, and output in the same accounting period. The published cache-write rate also depends on the selected five-minute or one-hour duration. Keep the reuse fraction and duration explicit in any estimate.
Compared with the current Fable 5 record, the 5.1 cache-read rate is lower ($0.25 rather than $1.00 per 1M tokens). Standard input and output remain $10/$50. That comparison does not turn a new integration constraint into a price discount: validate the request contract before assuming a cache-heavy workload is eligible to move.
Batch is half-price for token rates
Anthropic lists Batch input at $5 and Batch output at $25 per 1M tokens. Those are half of standard input and output. They are token prices, not a promise about latency, data handling, or eligibility; check the current Batch documentation and your operating requirements before changing a production lane.
Related migration constraints
Fable 5.1 uses adaptive thinking and does not accept a manual or disabled thinking configuration. Forced tool_choice type any and named-tool forcing return HTTP 400; auto and none are the documented valid choices. It is also not supported on Priority Tier. Read the full migration record before treating this as a pure rate-card update.
Frequently asked
What does Claude Fable 5.1 cost per million tokens?
$10 for standard input and $50 for output. Cache reads are $0.25, with $12.50 five-minute and $20 one-hour cache writes.
Does Claude Fable 5.1 have Batch pricing?
Yes. Anthropic lists $5 per million Batch input tokens and $25 per million Batch output tokens.
Is the $0.25 rate the cost of all input?
No. It applies to cached input reads. Standard non-cached input is $10 per million, and cache creation has its own duration-specific price.
Primary source
- Anthropic Claude Platform, Fable 5.1 model overview and pricing, checked September 2, 2026.
- Anthropic Claude Platform, Fable 5.1 migration guide, checked September 2, 2026.