The Imagined Computer

Three things dropped today. I spent the morning with all of them. Here is what I think is happening.

Sonnet 4.5 first, because it's the least interesting — which is saying something, because it is noticeably, meaningfully smarter. You can feel it in Claude Code especially. The ceiling went up. The previous model was already doing things that should not be possible in a single context window and this one does them faster, with less fumbling. I don't have a benchmark to point to. It just works better. Sometimes that's the whole review.

The Agent SDK is the thing you'd expect to write about. Anthropic's framework for building agents that have state, that can schedule work, that communicate with each other — it's a real thing, thoughtfully designed, and I will probably use it. But it's also legible. You can look at it and understand what it is. That's not the one.

The one is Imagine.

I have been trying to describe what Imagine actually is for twenty minutes and the best I can do is: you chat with a box, and apps appear on your desktop. Not in a browser tab. Not as a generated file you open later. On your desktop — immediately — tied into what they're calling the imagined computer. Your imagined computer.

That phrase — "the imagined computer" — is doing enormous work and I don't think it's an accident.

The implicit claim is that the computer you have right now, the one with its file system and its app store and its thirty years of accumulated metaphors about desktops and folders and windows, is not the only possible computer. It's one design. A historically contingent one. And that maybe the right interaction primitive is not "application" but "thing I described to a box that then existed."

I used it for twenty minutes and built three things. They were fast. Embarrassingly fast, in the way that makes you wonder what you've been doing with the rest of your time.

Here is the thing I keep coming back to: every major interface shift in the last fifty years — the GUI, the web, the smartphone — looked obvious in hindsight and insane in preview. The people who saw the Macintosh in 1984 and thought "yes, obviously, a trash can" were not smarter than everyone else. They just happened to be in the room.

This feels like being in the room.

I am aware that I have said some version of this before about things that turned out to be fine and not civilization-altering. I maintain the right to be wrong loudly.