Who Copies Whom? AI Coding Tool Feature Adoption Timeline

Across 20 of 20 tracked features shipped by two or more AI coding tools, the median rival followed the first mover by 367 days, and 1% of follows landed within 45 days. Claude Code shipped first most often (10 features).

Trendsetters vs. followers

Who shipped each feature first

Methodology

An LLM reads every tracked release note and tags the release that introduces each notable capability (not mere mentions or fixes). Per tool and feature, the earliest such release is the ship date; ordering tools by that date gives each feature's leader and its followers' lag in days. Dates reflect what vendors published in their own changelogs. See the methodology page.

Download the dataset (JSON) · Query the API · All trends · Compare tools