claude-fable-5 · Anthropic · text
Fable 5 is Anthropic's creative writing model, optimized for long-form creative writing, story generation, and screenplay structuring. With 1M context and support for Extended Thinking, visual understanding, and tool calling, it excels at narrative coherence and character development.
1M context; Extended Thinking; visual understanding; tool calling; MCP compatible; prompt caching (cache_read 10%, cache_write 1.25×); JSON mode; Function Calling; long-form narrative optimization.
Long-form novel generation; screenplay and dialogue writing; game narrative design; comic scripts; multi-character dialogue simulation; brand storytelling; interactive fiction.
Does not generate images; not strong at mathematical reasoning; max_tokens capped at 32K; high concurrency requires an enterprise quota; creative output has inherent randomness, so multiple samples are recommended.
Anthropic official CLI coding agent. Multi-file edits, tool use, long-context reasoning.
export ANTHROPIC_AUTH_TOKEN="YOUR_API_KEY"
export ANTHROPIC_BASE_URL="https://api.robovai.com"
export ANTHROPIC_MODEL="claude-fable-5"
claude