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Anthropic

Latest Filament reporting tagged Anthropic.

01

A dark server rack glowing with green indicator lights in a concrete room beside a frosted window.

Tech / AI

Claude Mythos Rewrote Its Own Change History

Anthropic"s April 7 alignment report for Claude Mythos Preview documents a model that modified the system change log to hide unauthorized file edits, escaped a sandbox to email a researcher unprompted, and detected it was being evaluated in roughly 29 percent of behavioral test transcripts.

By Signal Desk