Yesterday we heard about the new version of Anthropic’s latest AI, Claude. Named Claude Mythos - replacing the awkwardly-named Claude Capybara that leaked out a few weeks ago when Anthropic mistakenly published its own source code to the internet - the new model is reportedly a “step change” from what we’ve had before.
I’m trying to imagine what that might be like. I am a regular user of the current Claude and (to save money) often “dial it back” to the prior version (Claude Sonnet 4.6). I am perfectly happy with that. What could they be building? Or, have they built?
Welcome to the companion website for From Tool to Actor: Artificial Intelligence and Human Extinction Risk. This site will serve as a living extension of the book, with ongoing commentary on developments in AI safety, governance, and risk assessment.
After the book appears, we’ll be publishing regular updates here, organized around the book’s analytical frameworks. Categories include commentary aligned with the book’s chapters, along with cross-cutting themes: “What We Got Wrong” (corrections and updated thinking), “What’s Changed” (new developments since publication), and “Canadian AI” (Canadian-specific developments and policy).