Anthropic dropped Claude Fable 5 on June 9, 2026 — the first public Mythos-class model. It’s the unrestricted Claude Mythos 5 with targeted safeguards. For Polymarket trading bot builders working on complex, multi-file, long-horizon systems, this release delivers noticeable gains in coherence a...
Source: [Dev.to](https://dev.to/fatherson/claude-fable-5-mythos-class-for-polymarket-trading-bots-the-long-context-agentic-leap-developers-313k)