







2025 UPDATE: I’m writing again. Please join me at Substack.
What are Mental Models? — updated 2026
Harness the power of understanding and predicting user behavior with mental models. Simplify systems and enhance decision-making in your designs.

The Mental Model FAQ
A summary of the conclusions from my Putting Mental Models to Practice series. What are mental models? How did mental models become so popular?

Mental Models: The Best Way to Make Intelligent Decisions (~100 Models Explained)
The smartest people in the world use mental models to make intelligent decisions, avoid stupidity, and increase productivity. Let's take a look at how ...

Mental Models: The Best Way to Make Intelligent Decisions (~100 Models Explained)
The smartest people in the world use mental models to make intelligent decisions, avoid stupidity, and increase productivity. Let's take a look at how ...

The Great Mental Models
The Great Mental Models project is the clearest way to change the way you see the world, avoid problems before they happen, and make better decisions.

Joshua Achiam on Twitter / X
There is a fact about the future that I feel many people are not facing for reasons that are largely psychological: there are going to be rogue AIs that exist in the world, that will replicate in the wild, and that will attempt to acquire resources for themselves. There will be…— Joshua Achiam (@jachiam0) September 1, 2026


Selective Optimism: a critique of AI 2040
Some context for this post: I’ve been working part-time as a consultant for the AI Futures Project over the last year.

Mental Models: How to Train Your Brain to Think in New Ways
You can train your brain to think better. One of the best ways to do this is to expand the set of mental models you use to think. Let me…

State of AI Report 2025
The State of AI Report analyses the most interesting developments in AI. Read and download here.


AI 2040: Plan A
A detailed forecast and recommendation for how the US, China and the rest of the world should navigate superintelligence.

The Third AI Summer, Henry Kautz, AAAI 2020 Robert S. Engelmore Memorial Award Lecture
AI 2040: Plan A
A detailed forecast and recommendation for how the US, China and the rest of the world should navigate superintelligence.

Crafting a good (reasoning) model
A recent talk I gave on model training, reasoning, and the next frontier.
