Anthropic released Claude Fable 5 on June 9, 2026, the first Mythos-class model anyone can use
Pricing doubles Opus 4.8: 10 dollars per million input tokens, 50 out, free on paid plans until June 22
Cyber, bio, and distillation prompts get answered by Opus 4.8 instead, under 5 percent of sessions
SWE-Bench Pro hits 80.3 percent vs 69.2 for Opus...