Back to all models
anthropic
anthropicAnthropic: Claude Fable 5.1
Claude 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...
anthropic/claude-fable-5.1
Context Size
1,000K
Input Price
1,500,000 pts/M
Output Price
7,500,000 pts/M
Architecture
Text
Image
File
Supported Parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstoolsverbosity
Details
TokenizerClaude
Max Completion128,000 tokens
Provider Context1,000K tokens
ModeratedYes
CreatedSep 1, 2026