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Model board / Claude Fable 5

Claude Fable 5

previous Anthropic

Verified 2026-09-03 against the pages listed below. Prices are USD per 1M tokens, list rate — no committed-use, enterprise or volume discount.

Input
$10.00
Cached input
$1.00
Cache write
$12.50
Output
$50.00
Context window
1,000,000
Max output
128,000
Weights
closed
Caching
both

1h cache write $20.00

full 1M window at standard rates — no long-context premium; up to 128K output per request

read 0.1x input; 5m write 1.25x, 1h write 2x

Watch out

Superseded by the 5.1 revision this pass and moved to Legacy on Anthropic's own overview page. Same $10/$50 as 5.1, but cache reads cost 0.1x base here against 5.1's 0.025x — on a cache-heavy workload the newer row is strictly cheaper

What we would use it for

The top of the board when capability beats cost

What this has cost, week by week

Output price at each refresh since 2026-07-30. A vendor change is the provider changing its price. Our correction means this board changed what it prints and the provider's charge did not move — the two are never merged, because publishing the second as the first would be a price rise that never happened.

07-30 $50.00→08-06 $50.00→08-14 $50.00→08-20 $50.00→08-27 $50.00→09-03 $50.00
newly stated2026-08-06 · max_output — Anthropic's launch doc states 128K max output per request; the board had carried it as null.

Where these numbers came from

No number on this page was written that was not read from one of those pages on 2026-09-03. If one is wrong, send us the source URL and it is corrected in the next weekly refresh, with a changelog line saying what was wrong — contact@naderu.com.

Discussed in Naderu Weekly

The rest of the board

This row sits alongside 53 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.