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Claude Fable 5.1

Anthropic · claude-fable-5-1-default

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Claude model for demanding reasoning and long-horizon agentic work

Specification

most-agreed values

Context
1M
Max output
128K
Released
2026-09-01
Knowledge cutoff
2026-06
Retires
2027-03-01
Open weights
no
Input
text, image, pdf
Output
text

Price

US dollars per million tokens · most-agreed

Input
$10.00
Output
$50.00
Cache read
$0.25
Cache write
$12.50

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Cache write, 1 hourvertex_ai-anthropic_models$20.00

Available from 3 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
google-vertex$10.00$50.00$0.25$12.501M128K
google-vertex-anthropic$10.00$50.00$0.25$12.501M128K
vertex_ai-anthropic_models$10.00$50.00$0.25$12.501M128K2027-03-01

Other listings of this model

this page is one of them

The corpus files Claude Fable 5.1 under several keys. This page is the claude-fable-5-1-default listing. The full record — every host, every price and every benchmark score — is on the main Claude Fable 5.1 page.

More from Anthropic

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