Hamel’s Substack
Hamel Husain, Antaripa SahaMy newsletter lives at https://ai.hamel.dev
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 32 | Founded | 7 years ago | Last Issue | 5 days ago |
| Active | |||||
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hamelhusain.substack.comLatest Issues
Bring your eval problems to the last cohort of 2026
Hi everyone,
In September, Shreya and I wrote about how to find and fix hidden AI failures in Lenny’s newsletter. We wrote it because we think looking at your data is the most important step in building good evals.
I’ve also added 18 new...
Claude's new auto eval tool
Anthropic released new eval tooling for Claude Code. Their claude-api plugin now includes a new build_eval and hill-climb command that helps you build evals, check the graders, and improve your application against them.
I usually don...
The Revenge of the Data Scientist
Originally published on hamel.dev.
Is the heyday of the data scientist over? The Harvard Business Review once called it “The Sexiest Job of the 21st Century.”1 In tech, data scientist roles were often among the best paid.2 The job also dem...
Do Automated Evals Work?
By Antaripa Saha and Hamel Husain. Originally published by Parlance Labs.
For the past three years, we have answered most questions about AI evals with the same advice: look at your data.1 In practice, looking at your data means error anal...
AI Product Engineering Notes
AI product engineering is the work of turning a model into a useful product. Evals set the foundation for improving an AI product, but there are many knobs to turn, each with different trade-offs.
The lowest hanging fruit is to optimize re...
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The writers behind this newsletter.
I am a machine learning engineer with over 20 years of experience. More about me @ https://hamel.dev
ML Engineer working on evals and search.
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