Download Buncha Build for Windows
This is the official Buncha Build download. Version 2.9.30 is current. You get the setup program of about 34 MB or a portable single .exe of about 25 MB, and the SHA-256 checksum lets you verify either file.
- Press the download button. The site records the download and then redirects you to the setup program.
- Run the certutil command below on the downloaded file and compare the SHA-256 checksum with the one in the published manifest.
- Run the setup program. If Windows SmartScreen warns you, choose More info and then Run anyway, but only after the checksum matches.
- Open Buncha Build, connect a model, and choose the working folder that holds your documents.
No account is needed. A cloud AI provider may charge separately for its own service, and the portable single .exe needs no setup program. Prompts go only to the model endpoint you choose.
System requirements
Buncha Build runs on 64-bit (x64) Windows 10 and 11. The interface has 13 languages. Chats, working folders and API keys stay on the PC, and a model running locally on your PC keeps all prompt text there too.
Updates
Updates arrive in the app. It shows an Update button when a new version is ready, and the current release is version 2.9.30 from 8 November 2026.
Verify the download
certutil -hashfile "C:\Users\you\Downloads\<downloaded file>.exe" SHA256Replace the path with yours. The command prints a SHA-256 checksum, and you compare it with the published manifest and keep the file unopened until the two values match.
