What is Supermaven and how does it compare to Copilot?

Supermaven is a newer AI completion tool focused on ultra-fast, large-context completions (300,000 token context window). It's known for very low latency — suggestions appear faster than most competitors. Supermaven is particularly strong at completing large code blocks with long-range dependencies. It has a free tier and is worth trying if you find Copilot's suggestions too slow or short-sighted.