Three days ago, Anthropic released Claude Fable 5 — their first publicly available Mythos-class model, sitting above the entire Opus tier. It benchmarks over 10% better than Opus 4.8 on some coding tasks, ships with a 1M context window by default, and is built specifically for multi-agent workflows. Planning, sub-agent delegation, long-running autonomous execution. It's available in VS Code right now via Claude Code and a growing list of extensions. And that's what's been on my mind since Tuesda