Chorus

Chorus is a sophisticated and high-performance desktop application designed for macOS, fundamentally changing how users interact with artificial intelligence. It serves as a unified hub, allowing you to engage in conversations with a multitude of leading AI models—including OpenAI's GPT series, Anthropic's Claude, Google's Gemini, and various local open-source models via Ollama and LM Studio—all at the same time and within a single, streamlined interface. Built for speed and efficiency with a Rust backend, Chorus is crafted for professionals, developers, researchers, and power users who need to compare, cross-reference, and synthesize information from different AI perspectives to achieve more accurate and reliable results.

The core philosophy of Chorus is to eliminate the need to switch between multiple browser tabs or applications to consult different AIs. By sending a single prompt, users receive parallel responses from all selected models, displayed side-by-side for easy comparison. This not only boosts productivity but also helps in identifying model-specific biases, strengths, and weaknesses, leading to a more nuanced understanding and higher-quality outcomes. Beyond simple chat, Chorus is a powerful productivity tool equipped with advanced features that integrate seamlessly into your daily tasks.

How to use Chorus

Getting started with Chorus is straightforward. First, download and install the application on your Mac (versions for both Apple Silicon and Intel are available). Upon launching, you are greeted with a clean interface where you can immediately start a new chat. The key steps are:

1. Select Your Models: From the model picker, choose the AI models you wish to query. This can be a mix of cloud-based models like GPT-4o, Claude 3.7 Sonnet, and Gemini 2.5 Pro, as well as any local models you have set up through Ollama.
2. Compose Your Prompt: Type your question or task into the unified message composer. You can enhance your prompt by attaching files (PDFs, images, documents) or pasting a URL, which Chorus will automatically parse for context.
3. Receive & Compare Responses: Hit send, and Chorus will fetch responses from all selected models in parallel, displaying them in a clear, side-by-side layout.
4. Synthesize & Refine: Use the 'Synthesize' feature to have another AI model consolidate the different responses into a single, comprehensive answer. You can also branch conversations from any message to explore a specific line of thought without cluttering your main chat.
5. Leverage Advanced Features: For deeper integration, use 'Ambient Chat' to let Chorus see your screen for context, or use MCPs (Multi-modal Command Protocol) to allow AIs to perform actions like searching the web or running terminal commands.

Core Features of Chorus

• Multi-Model Chat Interface: Chat with multiple AI models from OpenAI, Anthropic, Google, OpenRouter, and local sources simultaneously.
• Response Comparison & Synthesis: View AI responses side-by-side to compare accuracy and style. A dedicated synthesis feature combines multiple answers into one coherent response.
• Ambient Chat: A powerful feature that allows Chorus to see your screen, providing contextual awareness for your queries without needing lengthy explanations.
• MCP & Tool Integration: Supports Multi-modal Command Protocols, enabling AIs to use tools like web search (via Perplexity), run terminal commands, and integrate with services like GitHub.
• Local Model Support: Full integration with local open-source models through Ollama and LM Studio, offering privacy and customization.
• Advanced Data Handling: Seamlessly upload and parse PDFs, images, and other documents. It can also extract text content directly from URLs.
• Productivity Tools: Features include lightning-fast full-text search of your chat history, extensive keyboard shortcuts, chat branching, custom system prompts, and the ability to import chat history from OpenAI and Anthropic.
• Project-Based Context Management: Organize chats into 'Projects' that share a common context, ensuring consistency and memory across related conversations.

Use Cases for Chorus

Chorus is versatile and valuable for a wide range of users:

• Developers & Engineers: Debug code, brainstorm architectural solutions, and translate code between languages by getting simultaneous feedback from models specialized in coding.
• Researchers & Academics: Cross-validate information from different AI sources, gather diverse perspectives on complex topics, and synthesize literature reviews efficiently.
• Writers & Content Creators: Overcome writer's block by generating a variety of ideas, tones, and styles. Compare different phrasings and creative directions in one go.
• Technical Support & Problem-Solving: Troubleshoot complex issues (e.g., DNS errors, software bugs) by leveraging the collective intelligence of multiple AIs to find a solution that a single model might miss.

Advantages of Chorus

Chorus offers significant advantages over single-model chat interfaces:

• Enhanced Accuracy: By comparing multiple responses, users can easily spot and discard AI hallucinations or incorrect information, leading to more reliable answers.
• Unmatched Efficiency: A single query replaces multiple separate interactions, saving significant time and effort.
• Deep Workflow Integration: Features like Ambient Chat, file uploads, and keyboard shortcuts make it a natural extension of your desktop environment.
• Flexibility and Control: Users can choose between the latest proprietary models and private, local models, and even bring their own API keys for unlimited use.
• High Performance: Built on Tauri with a Rust backend, the app is exceptionally fast, lightweight, and responsive.

Pricing and Plans

Chorus offers a flexible pricing structure to suit different needs:

• Hobby (Free): This plan allows users to bring their own API keys (BYOK) for unlimited access to fast models (e.g., Gemini 2.5 Flash, GPT-4.1 Mini) and includes 50 free requests per month for more powerful 'Plus' models.
• Plus ($20/month): Includes everything in the Hobby plan, plus access to a wide range of 'Plus' models like Claude Sonnet 4, GPT-4o, and DeepSeek R1, along with direct founder support.
• Frontier ($100/month): Designed for heavy users, this plan includes everything in Plus, with much higher usage limits and exclusive access to 'Frontier' models like GPT-4.5 and Grok 3 Fast.
• Team: Custom pricing is available for teams, with tailored features and support.