Claude Mythos - GoKawiil

Anthropic cuts cached-context costs 75% with Claude Fable and Mythos 5.1 launch

Anthropic released Claude Fable 5.1 and Mythos 5.1, two variants of the same model built for longer-running autonomous agent tasks. Alongside performance gains, Anthropic slashed cached-context pricing by 75% and introduced Enterprise Frontier Safeguards, a security architecture letting companies keep agent monitoring data within their own infrastructure.

it.slashdot.org · 2026-09-01

Anthropic launches Claude Fable 5.1 and Mythos 5.1 with cheaper pricing, new privacy system

Anthropic released two versions of its newest AI model—Fable 5.1, available to the public, and Mythos 5.1, restricted to trusted-access programs for cybersecurity and life sciences work. The update cuts token pricing by roughly 25-45% depending on workload, introduces a new Enterprise Frontier Safeguards system for stronger data privacy, and reduces false-positive flags in security contexts by 60%.

anthropic.com · 2026-09-01