
Chorus is a macOS desktop application that aggregates multiple AI models (such as GPT-4, Claude, Gemini) into a single interface. Users can query multiple models simultaneously, compare their answers, and process local file content.
The app supports mainstream cloud models including OpenAI's GPT-4/4o, Anthropic's Claude, Google’s Gemini. It also supports running local open-source models via tools like Ollama.
Chorus offers a free version. Its business model is subscription-based, and users can also use their own API keys to access the respective model services.
According to its stated policy, chat history is stored locally on the user's computer in an SQLite database by default; the app itself does not upload chats to servers. The data collected is mainly used for account management and product analytics.
Currently, Chorus primarily supports macOS. According to official information, a Windows version is in development, and users can join a waiting list.
The app supports uploading and parsing PDF documents, and it also accepts web page URLs to extract text so users can chat with AI based on the file contents.
After you submit a question, you can send it to multiple connected AI models at once. The app displays all model responses side by side for easy visual comparison, and you can also synthesize multiple answers into a single, comprehensive response.
Yes, its code is open-sourced on GitHub.

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