Is there a good AI coding assistant for Neovim or Vim?

Yes — Codeium, GitHub Copilot, and Supermaven all have Neovim plugins. Continue.dev also supports Neovim and lets you connect any LLM backend. For Vim purists, the setup requires more configuration than GUI editors, but the completions work well once configured. Tabnine also offers a Vim plugin. The Neovim ecosystem has mature AI tooling compared to most other terminal-based editors.