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Anthropic has launched a model welfare research program—the biggest move yet by a major AI lab on this issue. It comes with a wide-ranging interview with model welfare researcher Kyle Fish I've pulled out some of the key points (and Ghibli-fied Kyle and Stuart Ritchie 🇺🇦) 🧵

On which note, don’t forget to buy a ticket to THE STUDIES SHOW: LIVE (with Jesse Singal!), on 9th May! eventbrite.co.uk/e/the-studies-…

Everyone should go to this Studies Show LIVE in London. Annoyingly I'm doing some science journalism in Bulgaria. Tom Chivers and Stuart Ritchie 🇺🇦 run towards controversy and attack it with the pickaxe of science FACT. will be entertaining. And correct. thestudiesshowpod.com/p/invitation-t…

For over 60 years Scotland has built a proud nuclear heritage, delivering not just clean energy but well-paid jobs. But as things stand this is all set to end in 5 years time: right now any new nuclear power station or small modular reactor is BANNED in Scotland! 🧵

I'm doing live events in London tomorrow (with Sarah Ditum, Hadley Freeman, and Helen Lewis) and next Friday (with Tom Chivers and Stuart Ritchie), as well as a meetup in Amsterdam in a couple weeks. Deets here: jessesingal.substack.com/p/events

Last night was really fun! Thank you, London. Remember that I have another event this coming Friday with Stuart Ritchie 🇺🇦 and Tom Chivers, with drinks after for ticketholders. eventbrite.co.uk/e/the-studies-…

I maintain that I’ve never done anything to deserve this kind of treatment

Want to study the economic impact of AI and influence the policy choices a frontier lab makes? I'm building a team to advance Anthropic 's Economic Index & other ~special projects. Lots of fun! Economist: job-boards.greenhouse.io/anthropic/jobs… Data Scientist: job-boards.greenhouse.io/anthropic/jobs…

Last call! The Studies Show with Tom Chivers, Stuart Ritchie 🇺🇦, and yours truly tonight in London. £18.31, which is the price of one quarter of one cocktail! eventbrite.co.uk/e/the-studies-…

Look at the date on her tweet. He’s had more than three years to work out that what she said is perfectly sensible, and yet he still tweeted this. Terribly humiliating self-own (or, it should be humiliating).

Introducing the next generation: Claude Opus 4 and Claude Sonnet 4. Claude Opus 4 is our most powerful model yet, and the world’s best coding model. Claude Sonnet 4 is a significant upgrade from its predecessor, delivering superior coding and reasoning.

🧵For Claude Opus 4, we ran our first pre-launch model welfare assessment. To be clear, we don’t know if Claude has welfare. Or what welfare even is, exactly? 🫠 But, we think this could be important, so we gave it a go. And things got pretty wild…

UK public order law says that you are culpable if, in speech and other expressive acts, you could "provoke" others into violence. We have written a veto on speech into law that is exclusively available to groups willing to be violent.

What a lovely essay from Ed West about my hero, Richard Dawkins. I was sitting just to Ed’s right at the event he describes: edwest.co.uk/p/richard-dawk…

Has nominative determinism gone too far (h/t Benjamin)

My most important contribution to Anthropic so far: insisting that we mention Irn-Bru by name in this blog post:

This is outrageous. The group itself ought to be prohibited from organising and assembling, since it has shown itself to be a criminal organisation, but it is appalling to arrest people just for *expressing support for it*. These laws are broken.

Left the US on 4th July amid everyone celebrating the Constitution... ...returned to the UK on 5th July to find the police arresting people for expressing their opinions in public. Quite the contrast!

The responses here are really telling: the idea of “free speech even for people I don’t like” is totally alien to lots of British people. No wonder people are being arrested for jokes and tweets!

In 1937, London built 80,000 homes. Last year, it built less than half that. To find out why, I looked at two different planning applications for a four-storey block of flats from now and back then. 1937: 3 pages long. 2025: 1,250 pages long.