Zed's team details how they built Zeta2, their improved edit prediction model. Key improvements include richer input context (finer-grained edit history, LSP-resolved type/symbol definitions), a switch from Qwen 2.5 Coder (7B) to Seed Coder (8B) as the base model, and a knowledge distillation pipeline using Claude Sonnet as the teacher model. They addressed the 'reversal problem' where the model incorrectly deleted intentional user edits by improving teacher prompting and edit granularity. Training data shifted from synthetic GitHub commit examples to opt-in real user traces from open source repos, yielding ~250-300k training requests per week. The result is a 30% better acceptance rate and faster responses, validated through dogfooding, shadow releases, and gradual rollout.

How We Developed Zeta2 — Zed's Blog

Phoronix

Zed, the Rust-written cross-platform code editor created by the developers behind Atom, has reached version 1.0. The release includes real-time collaborative editing, AI integration, GPU-accelerated rendering, Git integration, and debugging support. Available on Windows, macOS, and Linux, the 1.0 milestone signals that most developers can now feel at home in Zed, though the team emphasizes it means readiness rather than perfection.

Best of Zed — April 2026