Jan AI
Officially listedAn open-source, free, privacy-first desktop client for running large language models locally.
Jan AI
Jan AI is a privacy-first, fully open-source desktop app for running local LLMs, aiming to be an offline alternative to ChatGPT. It lets users get a powerful, secure AI conversation experience on their own devices without an internet connection.
Core Capabilities
- Model download and management: A built-in model marketplace supports one-click downloads of mainstream open models such as Llama 3 and Mistral, making it easy to set up a local AI environment.
- Local API compatibility: A fully OpenAI-compatible local API service is on by default, letting developers plug local models into other apps or development workflows.
- Hybrid cloud access: Beyond offline local operation, it can seamlessly connect to proprietary cloud models such as OpenAI and Anthropic via API keys.
- Cross-platform desktop client: A clean ChatGPT-like chat interface, with native support for Windows, macOS, and Linux and a very low entry barrier.
- Hardware acceleration: Deep optimization for Apple Silicon (M-series) via MLX and for NVIDIA GPUs via llama.cpp, unlocking maximum local inference performance.
Who It's For Ideal for privacy-critical individuals and professionals such as lawyers and healthcare workers who need sensitive data to never leave the device; also great for AI beginners who want to experience and test open-source models at zero cost. For developers who need a free local LLM API as a backend, it is an excellent workflow engine.
Unique Advantages Compared with the hardcore command-line tool Ollama, Jan AI provides a polished, ready-to-use graphical interface; compared with the closed-source LM Studio, it is open-licensed and its interface focuses purely on an everyday chat assistant. It is the most approachable and secure entry point for ordinary users to experience open-source LLMs.
Editor's Review Jan AI dramatically lowers the barrier to running large language models locally with a minimalist, elegant approach. With full open source, a privacy focus, and an OpenAI-compatible local API, it is currently the best alternative to commercial cloud AI services. Although advanced model management and extreme hardware tuning still have room for polish, its active open-source community and clear positioning make it a must-install for any user who values data sovereignty.
Pricing
### 💰 定价模式：完全免费开源 **起步价**：免费 #### 主要方案 - **开源免费版**：$0 - 基于 Apache 2.0 协议开源，完全免费下载和使用，本地运行模型不产生任何费用，甚至可用于商业目的。 #### 试用/其他信息 若选择在客户端内通过 API 接入 OpenAI 等第三方云端大模型，则需要向相应的云端服务商支付 API 使用费。
FAQ
Is Jan AI free?
Jan AI is completely free and open source (Apache 2.0 license). You can run various large models locally for free, with no API call fees at all.
What can Jan AI do?
As an offline alternative to ChatGPT, it lets you run large language models locally for secure conversations, or act as a local API server backing other applications.
Which operating systems does Jan AI support?
It offers native cross-platform support, with desktop client applications for Windows, macOS, and Linux.
How does Jan AI protect my data privacy?
All interactions and data processing happen offline on your local device (unless you actively connect a cloud API), eliminating the risk of sensitive data leaks.
What's the difference between Jan AI and Ollama?
Ollama exists mainly as a command-line tool and backend service, suited to developers; Jan AI provides an out-of-the-box, elegant ChatGPT-like graphical interface, better suited to everyday users.
Does running Jan AI require a powerful computer?
It depends on the model size you run. An ordinary thin-and-light laptop can smoothly run small 7B-parameter models, but running large 70B-class models requires very high memory and VRAM.