Models / Anthropic
Claude Fable 5.1
by Anthropic ·
anthropic/claude-fable-5.1Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
reasoningtool-usevisionreleased 2026-09-01
Legal score · raw
-
not yet benchmarked
Context
1M
max output 128K
Input
$12.50
per 1M tokens
Output
$62.50
per 1M tokens
Suite cost
-
no run recorded
Prompt caching
Grounded answers re-send the same retrieved authority every turn, so a cached read is what a long matter actually costs. Prices are per 1M tokens, from the provider’s own catalog.
Cache read
$0.31
40x cheaper than uncached
Cache write
$15.63
per 1M tokens, charged once
Uncached input
$12.50
per 1M tokens
Capabilities
Modalities
in textimagefile
out text
Request parameters it accepts
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity
Benchmark results
This model has not been run through the suite yet. See Humanity's Last Lawsuit for the benchmark models are ranked on.