#Claude Fable 5 articles

Claude Latest News 2026 | What Changed with Fable 5, Design, and Code

Anthropic News Flash | Claude Fable 5 Announced and Sub-Agent 5-Layer Nesting

Anthropic news roundup for June 9–12, 2026. Covering the official announcement of Claude Fable 5/Mythos 5, the 5-layer sub-agent nesting in Claude Code v2.1.172, the multi-agent design blog post, and all 8 updates in detail.