Claude Fable 5.1
vendorAnthropic · claude-fable-5-1 · prices updated September 29, 2026
Input · 1M tokens
$10
Cached input · 1M
$0.25−98%
Output · 1M tokens
$50
Price history
inputoutput
Specifications
Context window1,000,000
Knowledge cutoffJun 2026
Tokenizertiktoken (cl100k_base)
Batch API−50% off the price
Tools
Web SearchCode InterpreterComputer UseMCP
Exact token counts: local tiktoken tokenizer (cl100k_base). Tool calls are billed by the provider separately.
About the model
Anthropic's most capable widely available model (2026-09-01); cache reads at 0.025× input; 1M context