🚀 Claude Fable 5.1 is here! Anthropic has just released the latest member of the Claude 5 family: Claude Fable 5.1. This isn’t just an ordinary version update—it’s an entirely new model tier: the Mythos level, positioned above Claude Opus and currently the most powerful Claude model publicly available. Key highlights: 🧠 Enhanced Intelligence Fable 5.1 is Anthropic’s most intelligent model ever made publicly available. Whether it’s complex reasoning, multi-step agent tasks, or coding and debugging, its performance has taken a significant leap. If you’ve used Opus, you’ll immediately notice the difference. 🔗 Shared Foundation with Mythos 5.1 Fable 5.1 and Mythos 5.1 are built on the same underlying model. The difference lies in additional safety measures applied to Fable 5.1 for dual-use capabilities, making it accessible to all users; Mythos 5.1 remains restricted to vetted organizations. In other words, ordinary developers and users can now access this level of capability. 🛠️ Available Across All Platforms Fable 5.1 is now available on the web, desktop, mobile, API, and integrated into Claude Code, Cowork, Chrome extension, and more—allowing existing Claude teams to upgrade with nearly zero friction. 📚 Updated Knowledge Base The knowledge cutoff has been extended to June 2026, providing better understanding of recent technological ecosystems and toolchains. After using it for a while, I’ve found Fable 5.1 to be significantly more stable in multi-step agent tasks and long-document processing—far fewer instances of losing track mid-task. If you haven’t tried it yet, now is a great time. Share your experience in the comments below! #Claude #Anthropic #AI #LLM