Claude Fable 5 (batch)

Claude Fable 5 in batch mode is Anthropic's most capable reasoning model, optimized for asynchronous processing with a 1 million token context window.

Strengths

Excels at complex multi-step reasoning, extended agentic work, and problems requiring the highest level of analytical capability.

Best for

Batch processing workflows where latency is not a constraint and you need Anthropic's most advanced reasoning abilities.

Limitations

Batch-only availability means it cannot be used for real-time or streaming applications; Claude Fable 5.1, released after this model, represents an incremental improvement.