3+ hour, 33+ min ago  (596+ words) There's an adage from programming in C++ which goes something like "Yes, you write C, but you imagine the machine code as you do." I assumed this was bullshit, that nobody actually does this. Am I supposed to imagine writing…...

1+ day, 8+ hour ago  (180+ words) God made the bulk; the surface was invented by the devil" - Wolfgang Pauli Collecting good data for this sort of thing is further compounded by minute differences in recipe implementations. Sharing data across labs is almost meaningless for some problems…...

2+ day, 10+ hour ago  (396+ words) Also, updates on the Anthropic vs. Pentagon court case. We're Hiring. Opportunities at CAIS include: Head of Public Engagement, Principal, Special Projects, Program Manager, Operations Manager, and other roles. If you're interested in working on reducing AI risk alongside a…...

3+ day, 8+ hour ago  (1862+ words) I don't ever let AI write for me. I'm not precious about that, but as of April 2026, AI just doesn't write as well as I do'and the difference matters to me. But with the right guidance, it does a great…...

4+ day, 9+ hour ago  (1659+ words) 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. Anthropic Staff Opinion About whether Mythos is a drop-in replacement for…...

4+ day, 21+ hour ago  (1046+ words) Semiconductor Fabs I: The Equipment Semiconductor Fabs II: The Operation I tried to include as many links as possible to allow the reader to go down rabbit holes as they see fit. I try to include analogies in case the explanation is…...

5+ day, 18+ hour ago  (1699+ words) Play the decoding game: can you eavesdrop on Claude Opus 4. 6? We also find that even a "barebones" Opus 4. 6 decoder " only told that a letter A-Z is hidden, not how the game works " still decodes at 36% (221/612), vs Sonnet 4 barebones at 7% (44/612), Haiku…...

6+ day, 1+ hour ago  (1516+ words) Code can be found here. This is my first interpretability research project, coming from a different field. I'm about 4 weeks into the field and learning and working solo. I've tried to be honest about the limitations and the mistakes I…...

1+ week, 2+ hour ago  (1239+ words) Hi, I'm kromem, and this is my 5th annual Easter 'shitpost' as part of a larger multi-year cross-media project inspired by 42 Entertainment, and built around a central premise: Truth clusters and fictions fractalize. (It's been a bit of a hare-brained idea…...

1+ week, 22+ hour ago  (431+ words) TLDR: When you make changes to a thing that has been optimised in some way, any effects of the changes you haven't planned will make it worse. Welcome to the alien planet Sqornshellous Beta. It's dry, it's arid, and it…...