Products & ServicesEvent: September 2, 2026
Anthropic shipped Claude Fable 5.1, the most capable model ever built for complex, long-running work including multi-step coding, analysis, and research tasks taking hours or days.
Published
Signal category
Products & Services
Quote
“We just shipped Claude Fable 5.1. It is our most capable model ever, built for complex, long-running work: multi-step coding, analysis, and research tasks that take hours or days.”
— Krishna Rao|Anthropic team
Company
Anthropic
Anthropic is an AI safety and research company working to build reliable, interpretable, and steerable AI systems.
- Industry
- Research Services
- Company size
- 5,998 employees
We're an AI research company that builds reliable, interpretable, and steerable AI systems. Our first product is Claude, an AI assistant for tasks at any scale. Our research interests span multiple areas including natural language, human feedback, scaling laws, reinforcement learning, code generation, and interpretability.