Claude Mythos 5 / Fable 5 (anthropic.com) AI

Anthropic has announced Claude Fable 5, its 5th model generation for long-running, complex knowledge work and coding, available on the Enterprise plan and via the Claude Platform/major cloud marketplaces, with pricing set at $10 per million input tokens and $50 per million output tokens (plus prompt-caching discount). The company says it’s built for agentic workflows (potentially running for days), can interpret diagrams and document tables via vision, includes safeguards that reroute cybersecurity/biology queries to Claude Opus 4.8, and requires 30-day data retention for safety monitoring.