Anthropic is leading the charge in user development of autonomous agentic systems, and its Tuesday debut of Claude Sonnet 4.6 delivered another blow to software companies. 

Anthropic's Sonnet 4.6 followed hot on the heels of the Claude Opus 4.6 release, creating a one-two punch that has left traditional software stocks reeling. 

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Software investors fear cannibalization: the concern that advanced AI agents, like Anthropic’s latest models, are rendering traditional user interfaces and subscription-based models obsolete.

Anthropic spoke to those exact fears in a blog post announcing the latest release on Tuesday. 

"Almost every organization has software it can't easily automate: specialized systems and tools built before modern interfaces like APIs existed. To have AI use such software, users would previously have had ...