Zed

Zed is a Rust-based editor built for speed, fully open source, with AI features and edit prediction baked in and the ability to plug in external agents like Claude Code. The free tier includes the whole editor plus unlimited use with your own API keys. The tradeoff is a smaller extension ecosystem than VS Code, so if you depend on niche plugins you may find gaps, though its raw speed and native feel win a lot of people over.