“Excerpts and Notes on Mythos Model Card” by williawa

List of Excerpts from Mythos model card. Tried to include interesting things, but also included some boring to be expected things. I omitted some things that were too long. Also wanna note, that this list of excerpts highlights "concerning" things above the rate at which they occur in the document.I frequently say "Anthropic seems to think ..." or "their theory appears to be that ...", and this doesn't mean I think the opinion is unsubstantiated or that they are wrong, its just a natural way to phrase things for me. Capability Stuff Anthropic Staff Opinion About whether Mythos is a drop-in replacement for entry Research Eng/Scientist We did an n=18 survey on Claude Mythos Preview's strengths and limitations. 1/18 participants thought we already had a drop-in replacement for an entry-level Research Scientist or Engineer, and 4 thought Claude Mythos Preview had a 50% chance of qualifying as such with 3 months of scaffolding iteration. We suspect those numbers would go down with a clarifying dialogue, as they did in the last model release, but we didn’t engage in such a dialogue this time. Model hallucinates much less and also gets dramatically better [...] ---Outline:(00:43) Capability Stuff(03:52) Cyber Capabilities(05:08) Alignment(21:20) White Box Evaluation of Model Internals(23:52) Model Welfare(24:36) Alignment Risk Update companion report --- First published: April 8th, 2026 Source: https://www.lesswrong.com/posts/ZfbChZBXgje8T6Geu/excerpts-and-notes-on-mythos-model-card --- Narrated by TYPE III AUDIO. ---Images from the article:Apple Podcasts and Spotify do not show images in the episode description. Try Pocket Casts, or another podcast app.