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Run Data Run

Substack

Building in public. AI experiments, lessons learned, and the journey of treating AI as a multiplier.

Earlier posts (13 more)
Jun 23, 2026

Ep. 1: Two Groups

Same AI, same task, a different result. The difference isn't the model.

What AI Didn't Reprice
Jun 22, 2026

What AI Didn't Reprice

AI marked down almost every skill on your team this year. One it marked up. If you run a budget, that one number should change where you're spending.

You Don't Have to Write the Code
Jun 17, 2026

You Don't Have to Write the Code

Anthropic watched 400,000 sessions with a coding agent and found that what predicts success isn't your job or your syntax. It's whether you understand the work. That changes who gets to build, and...

The Wrong Tool Problem in Genomic AI
Jun 14, 2026

The Wrong Tool Problem in Genomic AI

A leaderboard tells you which model wins. It can't tell you that you picked the wrong kind of model.

What one day with Fable 5 looks like for a builder
Jun 11, 2026

What one day with Fable 5 looks like for a builder

Most private tools that work never become public ones. Here's the afternoon that gap collapsed.

Apple Rented Its Brain
Jun 10, 2026

Apple Rented Its Brain

The company that owns its whole stack just outsourced the one part you'd assume it never would. That choice is the most interesting thing at WWDC.

AI Is Building AI. Now Read the Footnotes.
Jun 7, 2026

AI Is Building AI. Now Read the Footnotes.

Anthropic published striking evidence that AI is automating its own development. The shift is happening. The way it was sold deserves a closer look.

She Already Built It
Jun 5, 2026

She Already Built It

I set out to add federated learning to my research agent. She'd already designed and built it in February. This is what compounding autonomous research actually looks like.

The skill that edits its own instructions
Jun 5, 2026

The skill that edits its own instructions

Self-editing skills, the ecosystem racing to build them, and the flywheel that makes any of it compound.

Pulling Threads
Jun 1, 2026

Pulling Threads

I dropped my autonomous loop into a blind pharma challenge with zero background in the field. Then I read my own write-up and noticed I kept saying "I".

Opus 4.8 and Workflows - One Careful Pass Is No Longer the Default
May 29, 2026

Opus 4.8 and Workflows - One Careful Pass Is No Longer the Default

Anthropic shipped Opus 4.8 and Dynamic Workflows on the same day. Together they move the unit of agentic work from one model call to dozens of verified ones.

The Atomic Unit of Work Just Changed
May 27, 2026

The Atomic Unit of Work Just Changed

The model commoditized. The frontier moved to the unit of work running on top of it, and that unit can now reason.

The Model Is No Longer the Frontier
May 24, 2026

The Model Is No Longer the Frontier

ACM convenes its first conference on agentic systems next week. Almost none of the papers touch the model. That's the story.

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