Set up in a few minutes.
Getting a key, your first chat, every setting and shortcut, and fixes for the usual problems.
Getting startedDownload
Mosaik for Windows.
The free beta for Windows 10 and 11. Bring your own key, use any model, and keep your chats on your computer.
Download Mosaik.
For Windows 10 and 11, 64-bit. Free, with no account to create and no limits on use.
Mosaik is a Windows app. Send yourself the link and get it on your PC.
- Version
- Released
- Size
- File
- SHA-256
- What's new
- Release notes
The first release is almost here.
The app isn't out just yet. Leave your email to hear the moment it's ready, or join the community.
The version details didn't load just now. The download button still gets you the newest version.
What you need
A Windows PC and somewhere to get models from. Mosaik runs on your computer and talks to the models with your own key, so there's nothing to sign up for with us.
| Windows 10 or 11 | 64-bit. Linux is planned next, and macOS may follow. |
|---|---|
| Your models | A free account at openrouter.ai is the easiest start: the setup guide signs you in with one click, and free models need no card. A key you already have works too. How it works. |
| An internet connection | For the models and web search. Your chats stay on your computer. |
If Windows says “Windows protected your PC”
The installer isn't code-signed yet, so the first time you run it, Windows SmartScreen doesn't recognise it. That's normal for a new program without a signature. To carry on:
- More info
- Run anyway
After More info, the window shows the file's name and “Unknown publisher”. We plan to sign the installer, and then this step goes away.
To check you have the file we published, compare its SHA-256 with the one above. In PowerShell, in your Downloads folder:
Get-FileHash .\Mosaik-Setup-*.exeWhat the installer does
It's an ordinary installer. It needs no administrator rights and leaves your data alone.
- Installs Mosaik for you alone, in
%LOCALAPPDATA%\Programs\Mosaik, with no admin prompt. - Adds Mosaik to the Start menu, and to the desktop if you tick the box.
- Keeps your chats, settings and key in a separate place, so updating or uninstalling never touches them.
- Sets Mosaik to update itself when you close it. Settings › About and updates can change that.
Every version.
What changed in each release. Every installer we've published is on GitHub too.
Release notes GitHubNot on Windows?
Mosaik in your browser is coming soon, for any computer or phone. Linux is next for the app, a mobile app is planned, and macOS may follow.
See the roadmap Join the community