Claude Fable 5.1
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Overview
Incremental update to Anthropic's frontier flagship Claude Fable 5: 1M-token context, 128K max output, and a cache-read price cut to $0.25/M. Artificial Analysis Intelligence Index 66; Terminal-Bench-Science 52.6%.
Generates
App availablePDF generationSpreadsheet generationVoice chat
Details
- Vendor
- Anthropic
- Type
- LLM
- Release year
- 2026
- Jurisdiction
- USA
- CEO
- Dario Amodei
- Key staffers
- Daniela Amodei (President & Co-Founder), Jack Clark (Co-Founder, Policy), Tom Brown (Co-Founder), Sam McCandlish (Co-Founder), Jared Kaplan (Co-Founder, Chief Science Officer), Mike Krieger (Labs), Paul Smith (CCO)
- Deployment
- Cloud (Claude apps + API; Amazon Bedrock, Google Vertex AI, Microsoft Foundry)
- Open source
- No
- Free tier
- Yes
- Subscription
- API: $10/M input, $50/M output; cache-read cut to $0.25/M.
- Stock status
- Private ($380B valuation, Feb 2026); confidentially filed for IPO Jun 1, 2026
- X
- @AnthropicAI
Known safety issues
None publicly documented
AIDb Rating
AIDb v2.0 (curated): Capability 9/10 · Currency 10/10 · Access 5/10 · Significance 8/10 → 8.00
Last verified 2026-09-14 · Primary source ↗
Cite this
“Claude Fable 5.1.” AIDb — The AI Database. Verified 2026-09-14. https://theaidatabase.com/m/anthropic-claude-fable-5-1.html
More from Anthropic
Claude · Claude 2 · Claude 2.1 · Claude 3 · Claude 3 Haiku · Claude 3 Opus · Claude 3 Sonnet · Claude 3.5