Sebastian Mallaby ✓

@scmallaby · London/NYC/Washington DC · joined 27 Dec 2011

Snr Fellow @CFR_org. Book: THE INFINITY MACHINE: Demis Hassabis, DeepMind, and the Quest for Superintelligence. Podcast: The Spillover. RTntEndst. Opin mine.

19 249Followers

577Following

3 203Posts total

2.1MViews on collected posts

Against accounts of the same size

7 posts from the last 90 days, next to the 10K–100K follower range. shown widely, but few of those viewers react.

Median views6 513this account3 808median for 10K–100K

Reach, %33.84%this account12.23%median for 10K–100K

Engagement, %0.44%this account1.37%median for 10K–100K

Metric	This account	Median for 10K–100K	Ratio
Median views per post	6 513	3 808	1.71×
Reach (views ÷ followers)	33.84%	12.23%	2.77×
Engagement rate	0.44%	1.37%	0.32×

Others in this range → Compare with another account → How these benchmarks are built →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

174.2K18 Mar

1.9M26 Aug

6.5K

2.2K27 Aug

10.1K

3K28 Aug

12.4K29 Aug

2.5K30 Aug

Last 8 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.33%18 Mar

0.44%26 Aug

0.57%

0.36%27 Aug

0.64%

1.29%28 Aug

0.28%29 Aug

0.44%30 Aug

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.37%.

What the audience does

Likes46.1%7 147 in total

Reposts7.2%1 117 in total

Replies2.1%320 in total

Quotes2.8%438 in total

Bookmarks41.8%6 483 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Latest posts

Great to have Torsten Slock on The Spillover podcast. We discussed the financing of the AI boom. Bubble or not? Listen and choose. 2.5K views · 11 likes · 0 reposts · 0 replies 30 Aug 2026 “The 60-40 [portfolio] was designed with hedging in mind,” says Torsten Slok, chief economist at Apollo, a global asset management firm. “The challenge is that today the 10 biggest stocks make up 40% of the S&P 500. In other words, most of the returns for the last 5 years in 12.4K views · 24 likes · 7 reposts · 0 replies 29 Aug 2026 What to fear more: an AI bubble, with Nvidia the enabling force at the center of it; or autonomous AI swarms that defy human control? My take here: https://t.co/fGOIHBfyc8 3K views · 33 likes · 4 reposts · 1 replies 28 Aug 2026 Sobering testimony from the front line of AI safety. I watched the post-mortem by the 2 OpenAI engineers after the Hugging Face hack was discovered. But the full report, and the description of how hard it was to complete the report, make the episode even more disturbing. No 10.1K views · 54 likes · 9 reposts · 2 replies 27 Aug 2026 @DavidCahn6 is a wonderful thinker, who spotted the tricky economics of the AI capex boom earlier than most. Here he suggests that “team-driven” early-stage investing is both understandable and, probably, misguided. However brilliant the team, however captivating the vision, 2.2K views · 7 likes · 1 reposts · 0 replies 27 Aug 2026 https://t.co/3m7LjyaZk9 6.5K views · 30 likes · 3 reposts · 3 replies 26 Aug 2026 I was the main person doing transcript analysis for this investigation of the Hugging Face incident. My main takeaway: We don't have good approaches for understanding/overseeing the activity and aims of AI 'swarms'. I semi-jokingly called our efforts a "slop-vestigation" because 1.9M views · 6.5K likes · 1K reposts · 292 replies 26 Aug 2026 Proving it is better to be lucky than smart, I negotiated deep access to Demis Hassabis and DeepMind in November 2022. A week later, ChatGPT launched, and I began my deep-dive conversations with Demis and his team just as AI moved from the fringe to the mainstream. The result is 174.2K views · 479 likes · 53 reposts · 22 replies 18 Mar 2026