June 10, 2026
Today's Top Stories
1.
Claude Fable 5 Goes Public — Anthropic released its first publicly available Mythos-class model, with always-on thinking and a 1M-token context window — days after warning that AI is getting too dangerous.
2.
80.3% on SWE-Bench Pro — Fable 5 lands ~21 points ahead of GPT-5.5 on the hardest coding benchmark, at $10/$50 per million tokens — free on paid plans through June 22, then usage credits.
3.
Mythos 5 Stays Locked Down — The same model without safety classifiers is restricted to Glasswing partners and vetted researchers, while Fable 5 hit Amazon Bedrock, Cursor, and Copilot on day one.