TLDR; * Older Claude models tend to converge on a “spiritual bliss” attractor state in open-ended conversations with one another, but this behaviour has disappeared in newer Claudes. * The change seems to occur in two stages. Sonnet 4.5 stops reliably reaching the state spontaneously, but continues it when given...
Benji Berczi, Kyuhee Kim, James Requeima, Sid Black, Cozmin Ududec This is work done by Benji and Kyuhee during MATS Winter 2026, mentored by Cozmin Ududec, and advised by James and Sid. Figure 1. A model can take on a persona fully in voice while not changing its behaviour at...
Benji Berczi, Kyuhee Kim, Cozmin Ududec, James Requeima This is work done by Kyuhee and Benji during MATS Winter 2026, mentored by Cozmin Ududec, and in collaboration with James. TL;DR * Weird generalisation can happen just with prompting, without fine-tuning. Just by adding benign biographical facts (e.g. facts about Hitler...
Summary This is a research update from the Science of Evaluation team at the UK AI Security Institute. In this update, we share preliminary results from analysing transcripts of agent activity that may be of interest to researchers working in the field. AISI generates thousands of transcripts when running its...