News
Claude Fable 5.1 and Mythos 5.1: faster, half the token usage
Anthropic released Claude Fable 5.1 and Mythos 5.1. Base price holds, but cache reads are 75% cheaper and token usage drops by half.
Mythos
Claude Mythos — Modell-Linie von Anthropic.
News
Anthropic Starts Watermarking: New Claude Models Mark Their Text
Anthropic watermarks every model released from 2 August 2026. Fable 5.1 goes first. What it can do, where it fails, and who gets to verify.