You need to create and sign into a Zed account to use their prediction AI (Zeta) in order to get 2000 free predictions.
https://zed.dev/docs/ai/edit-prediction
You can also download the same model and run it locally without data leaving your machine, the Zed tram released it as open weights: https://huggingface.co/zed-industries/zeta-2
alt Hacker News
You can also download the same model and run it locally without data leaving your machine, the Zed tram released it as open weights: https://huggingface.co/zed-industries/zeta-2