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Lenny Rachitsky@lennysan
Anthropic AI researcher: “A lot of what we do feels so much closer to biology than to engineering.” 🔗 View on Twitter Lenny Rachitsky @lennysan "To make them is not to understand them." Emmanuel Ameisen ( @mlpowered ) has spent the last 3 years doing interpretability research at @AnthropicAI , looking inside LLMs like Claude to figure out what they're actually doing. As he puts it, models are "grown," not built. We discuss: 🔸 His discovery that models plan many tokens ahead 🔸 Why anthropomorphizing AI can actually be the right approach 🔸 What the "J-space" reveals about how models think 🔸 How interpretability connects to AI alignment and safety Listen no youtu.be/JHo-aiePjoM fpkab 🔗 View Quoted Tweet
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---
tweet_id: "2111893101371363505"
author: "lennysan"
published_at: "2026-10-18T18:52:07+00:00"
source_url: "https://x.com/lennysan/status/2111893101371363505"
---

Anthropic AI researcher: “A lot of what we do feels so much closer to biology than to engineering.”

[🔗 View on Twitter](https://x.com/lennysan/status/2111893101371363505/video/1)

![Lenny Rachitsky](https://pbs.twimg.com/profile_images/1592990461517389824/iln8hi1f_normal.jpg)

Lenny Rachitsky@lennysan

"To make them is not to understand them."  
  
Emmanuel Ameisen ([@mlpowered](https://x.com/mlpowered)) has spent the last 3 years doing interpretability research at [@AnthropicAI](https://x.com/AnthropicAI), looking inside LLMs like Claude to figure out what they're actually doing. As he puts it, models are "grown," not built.  
  
We discuss:  
🔸 His discovery that models plan many tokens ahead  
🔸 Why anthropomorphizing AI can actually be the right approach  
🔸 What the "J-space" reveals about how models think  
🔸 How interpretability connects to AI alignment and safety  
  
Listen no[youtu.be/JHo-aiePjoM](https://youtu.be/JHo-aiePjoM)fpkab

[🔗 View Quoted Tweet](https://x.com/lennysan/status/2111814390521413660)

## 视频地址

- [视频 1](https://video.twimg.com/amplify_video/2111893023017598976/vid/avc1/1080x1920/rmnk7dJvQuWqeRhC.mp4?tag=29)