Workday, Oracle and Palantir Technologies stocks are falling – what you need to know

What happened?

A number of stocks fell in the afternoon session after Anthropic released new models (Claude Fable 5 and Claude Mythos 5) that were described as designed for “the toughest knowledge work and programming problems.”

Mythos was restricted for about two months as part of Project Glasswing, a managed rollout to select governments and companies aimed at containing its cybersecurity risk profile before a wider release. This is important because the SaaSpocalypse thesis is reinforced every time a more powerful AI agent arrives. When Anthropic launched Claude Cowork in January, it triggered a $285 billion crash in software stocks in a single session, while Goldman’s U.S. software basket fell. This is another iteration of the same logic: if an agent available for $20 a month can now do long-term, multi-stage knowledge work, the case for a more expensive per-seat solution…