Catalog
Anthropic
Claude Fable 5
Next-generation intelligence for long-running agents
Official specs
- Main purpose
- Sustained agent work, writing, and high-end conversation
- Context window
- 1M tokens
- API pricing
- $10 input / $50 output per 1M tokens
- Access
- claude.ai, Anthropic API, Amazon Bedrock
- Knowledge cutoff
- January 2026
Capabilities
Key features
- 1M-token context
- Adaptive thinking (always on)
- 128K max output tokens
- Vision input
Notes
- Anthropic lists Fable 5 as slower, higher-end intelligence for long-running agents.
- Arena text-leaderboard ranks in August 2026 press are reported, not from Anthropic’s model card.
Limitations
- Highest Claude API price in this catalog; listed as slower than Opus, Sonnet, and Haiku.
Context, pricing, cutoff, and latency class from Anthropic model docs.
Vendor source