
Claude Fable 5.1 marries lower cost with stricter safeguards
Anthropic introduced Claude Fable 5.1 and Claude Mythos 5.1, pitching a single advanced model with two safeguard tiers that target different use cases, from enterprise coding to high‑risk research. According to Anthropic’s announcement, the release trims token costs, tightens access for sensitive work, and debuts a new path to zero‑retention privacy for large customers (Anthropic). […]







