Mingxue (Mercy) Xu

Founder of startup Facthink, prev PhD student @ImperialCollege in LLM compression.

[Mingxue (Mercy) Xu @MercyXu2022]

This video is too beautiful 😍

[Claude @claudeai]

Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.

Its capabilities exceed those of any model we’ve ever made generally available.

[Mingxue (Mercy) Xu @MercyXu2022]

Personally, I think values are severely underrated, though it really determines how you treat other people and an emergent technology. Some people use AI for self-achievement, expanding the boundaries that were unreachable before. Some people use AI to distill human employees.

[Chris Olah @ch402]

https://t.co/udIVxLdid5

[Mingxue (Mercy) Xu @MercyXu2022]

A very common word I’ve used a lot with Claude Code recently is “use your imagination”.
Got a lot of surprise :D

[Mingxue (Mercy) Xu @MercyXu2022]

Enjoy (and feedback extremely welcome)!! (4/4) https://t.co/6Vf5eeIvhu

[Mingxue (Mercy) Xu @MercyXu2022]

Give a research claim, let three agents debate for you, with actual research literature!

A comprehensive memo outlining their assessment of your claim, what they find during their debate, and which papers (and where) they consider informative. (1/4)

[Mingxue (Mercy) Xu @MercyXu2022]

Verifier challenges weak spots in the assessment, Builder revises, Judge decides whether the assessment is ready, needs another debate round, or should be rejected. (3/4)

[Goodfire @GoodfireAI]

Neural networks might speak English, but they think in shapes.

Understanding their rich *neural geometry* is key to understanding how they work – and to debugging and controlling them with precision.

Starting today, we’re releasing a series of posts on this research agenda. 🧵

[Mingxue (Mercy) Xu @MercyXu2022]

Amazing:D

[Anthropic @AnthropicAI]

We’re sharing the research agenda of The Anthropic Institute, or TAI.

TAI will focus on four areas:

1) Economic diffusion
2) Threats and resilience
3) AI systems in the wild
4) AI-driven R&D

Read the full agenda: https://t.co/TvUINlE7Ae

[Mingxue (Mercy) Xu @MercyXu2022]

There are indeed some brilliant people here in the UK, you’ve never (and impossibly) met, but cheering you up for so long.

[Physics In History @PhysInHistory]

Ada Lovelace, often considered the first computer programmer, wrote an algorithm in the mid-1800s for Charles Babbage's Analytical Engine to calculate Bernoulli numbers. This makes her algorithm over 170 years old, predating modern electronic computers by a century.

[Mingxue (Mercy) Xu @MercyXu2022]

Company working on mechanistic interpretability got funderized!!!

[Goodfire @GoodfireAI]

We raised a $150M Series B at a $1.25B valuation to fundamentally change the field of AI. Scaling is powerful, but we can't intentionally design what we don't understand.

[Mingxue (Mercy) Xu @MercyXu2022]

@Rainmaker1973 Minimalist!

[Mingxue (Mercy) Xu @MercyXu2022]

First inspiration this year:D

[Yuandong Tian @tydsh]

Got a request from a professor wanting to cite my Zhihu new year blogpost in his paper, about my theory of "Fermi Level" for human society due to AI impact.

So I translate it, together with building a personal blogpost site.

https://t.co/0ruCo961W9

It only takes a few hours to nail down all the details, and it is only one of the concurrent workstreams. AI coding agents are just incredible nowadays!

[Yuandong Tian @tydsh]

Got a request from a professor wanting to cite my Zhihu new year blogpost in his paper, about my theory of "Fermi Level" for human society due to AI impact.

So I translate it, together with building a personal blogpost site.

https://t.co/0ruCo961W9

It only takes a few hours to nail down all the details, and it is only one of the concurrent workstreams. AI coding agents are just incredible nowadays!

[Mingxue (Mercy) Xu @MercyXu2022]

I’ve been much inspired by some thought-provoking claims about AI in Nexus by Harari (he is in this conversation), and I notice some cases he mentioned are currently happening. Recently I am reading another of his thought-provoking books, Sapiens!

[Geoffrey Hinton @geoffreyhinton]

I just watched a really great conversation about the future of AI. Every politician should watch it before they join the lemmings saying that regulation of AI will interfere with innovation.
https://t.co/w8H1ZFLHdg

[Mingxue (Mercy) Xu @MercyXu2022]

The first book that after leaving the bookshop, I decided to turn back and bought it! Nexus by Yuval Noah Harari, the most amazing part for me is the discussion on when facing technology, what we gain and sacrifice, with the real historical examples.

[Mingxue (Mercy) Xu @MercyXu2022]

Was too obsessed to the sunshine and forgot to take an appropriate photo during the daytime… Hope everyone has amazingly lovely Christmas Eve, and Merry Christmas!!! 🎄🥳🍾

[Joe Stacey @_joestacey_]

Wowww I passed my viva today!!

Massive thank you to my assessors @roireichart and Francesca Toni for all their insightful and helpful feedback.

I feel so lucky to have had the chance to do a PhD with @MarekRei who has been such a brilliant supervisor.

[Fei-Fei Li @drfeifei]

It’s an honor to have received the @QEPrize along with my fellow laureates! But it’s also a responsibility. AI’s impact to humanity is in the hands of all of us.

[Lisa Alazraki @LisaAlazraki]

✨ Accepted as a Spotlight at #NeurIPS2025! Huge thanks to my coauthors and everyone who supported us. Check out the details below 👇