DualChat — Chat Side by Side

About this app

DualChat is a native macOS AI chat client built around one powerful idea: ask two or three AI models the same question at the same time, and view their answers side by side in a single window. All Your AI Services in One Place Connect to OpenAI ChatGPT, Anthropic Claude, Google Gemini, xAI Grok, DeepSeek, Perplexity, Ollama (local models), and OpenRouter. Just add your API key and freely switch or combine any service within the app. Dual or Triple Model Parallel Chat Send one message to two or three AI models simultaneously and watch all responses arrive side by side. Compare how different models reason, write, and solve problems — with diff highlighting and sentence-by-sentence comparison, you can instantly spot differences in quality, accuracy, and style. Whether you want a second opinion or a three-way debate, DualChat makes multi-model comparison effortless. Reasoning Process Visualization See the full thinking chain of AI models that support reasoning (e.g., DeepSeek-R1, o1/o3). Expand or collapse the reasoning section with a single click, and review the time spent on each step. Multimodal Attachments Send images and PDF files for AI analysis. Supports vision models (GPT-4o, Gemini) for image uploads and intelligent PDF document parsing — perfect for summarizing, extracting, or discussing file contents. Customizable AI Personas Choose from built-in personas — Software Engineer, AI Expert, Natural Sciences Expert, History Buff, Fitness Trainer, Dietologist, DBT Psychologist, and more. Each persona comes with its own system prompt and temperature setting. You can also create fully custom personas. Appearance Themes Switch between Light, Dark, and System-matched themes. Enjoy beautifully rendered Markdown and syntax-highlighted code blocks for a comfortable reading experience. Native macOS Experience Built with SwiftUI from the ground up. DualChat embraces the Mac with a navigation sidebar, keyboard shortcuts, system notifications, drag-and-drop, native menus, and smooth performance you expect from a first-class macOS app. *** Please Note *** DualChat does not include any built-in AI models. You need to bring your own API key from a supported AI service provider (such as OpenAI, Anthropic, Google, DeepSeek, Openrouter, Bigmodel, etc.) or run a local model via Ollama to start chatting.

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1. First observed Aug 7, 2026 · 10:55 PM $1.99