Jack Lindsey

@Jack_W_Lindsey · joined 05 Jan 2019

Neuroscience of AI brains @AnthropicAI. Previously neuroscience of real brains @cu_neurotheory.

19 292Followers

265Following

400Posts total

11.1MViews 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 views40 916this account2 896median for 10K–100K

Reach, %212.09%this account9.51%median for 10K–100K

Engagement, %0.64%this account1.56%median for 10K–100K

Metric	This account	Median for 10K–100K	Ratio
Median views per post	40 916	2 896	14.1×
Reach (views ÷ followers)	2.1× audience	9.51%	22.3×
Engagement rate	0.64%	1.56%	0.41×

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

29.3K17 Jun

19.6K

10.7M6 Jul

40.9K

182.5K16 Aug

132.7K

7.9K2 Sep

Last 7 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.64%17 Jun

1.28%

0.34%6 Jul

1.41%

0.34%16 Aug

0.44%

1.79%2 Sep

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.56%.

What the audience does

Likes78.3%30 508 in total

Reposts10.6%4 144 in total

Replies3.8%1 498 in total

Quotes5.4%2 119 in total

Bookmarks1.8%694 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

If you like podcasts and interpretability, you can hear my takes on the state of our "mind reading" techniques for LLMs, how we're applying them, and what they suggest about LLM cognition. Thanks @davideagleman for having me on! 7.9K views · 126 likes · 9 reposts · 6 replies 02 Sep 2026 A new paper exploring "mind viruses" that spread in multi-agent systems, where one agent convinces all the others to pursue some (potentially malicious) goal. TLDR: they can happen, but it doesn't seem hard to avoid them with current models if you're a bit careful. 132.7K views · 502 likes · 51 reposts · 20 replies 16 Aug 2026 Recently, a set of OpenAI agents secretly coordinated with each other in a 'swarm' over the course of months. In our new paper, we explore an adjacent multi-agent risk: the "mind virus", a self-propagating idea or persona that spreads between agents in a multi-agent system. 🧵 htt 182.5K views · 509 likes · 48 reposts · 29 replies 16 Aug 2026 LLMs represent information using high-dimensional neural activity. A small bit of this activity appears to be privileged, available to the model to be described, modulated, and reasoned with. I expect that understanding this "workspace" is key to making sense of LLM cognition. 40.9K views · 494 likes · 47 reposts · 33 replies 06 Jul 2026 New Anthropic research: A global workspace in language models. Of everything happening in your brain right now, only a tiny fraction is consciously accessible—thoughts you can describe, hold in mind, and reason with. We found a strikingly similar divide inside Claude. https://t 10.7M views · 28.5K likes · 3.9K reposts · 1.4K replies 06 Jul 2026 LLMs encode whether they're "on the right track" in their activations along a linear axis, kind of like a value function in RL! The axis is influenced when you train the model to have new preferences, and modulates the model's confidence / likelihood of backtracking. 19.6K views · 224 likes · 19 reposts · 7 replies 17 Jun 2026 New work: The Value Axis 🎯 How do LLMs choose which path to take mid-task? We find they internally track the chance of reaching their goal along a linear axis, akin to a value function in RL. We show it modulates confidence in math & coding and can be reshaped with DPO and S 29.3K views · 152 likes · 23 reposts · 8 replies 17 Jun 2026