Simon Willison • 2/27/2026

An AI agent coding skeptic tries AI agent coding, in excessive detail

The article details a coding skeptic's experiments with advanced AI coding agents like Claude Code and Opus. He undertakes increasingly ambitious projects, from simple scrapers to porting Python's scikit-learn library to Rust, finding the models' capabilities far exceed expectations. It discusses the challenge of conveying this rapid progress to a skeptical audience.

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#Machine Learning #llm #rust