120.dev

The flagship product, 120 AI Chat, provides a native desktop interface for interacting with over 50 AI models from OpenAI, Anthropic, Google, xAI, Hugging Face, Stability, and Vercel, as well as local LLMs running via Ollama including Llama, DeepSeek-R1, Mistral, and Gemma 3.

The defining philosophy of 120.dev is performance without compromise.

While most AI chat interfaces run in browsers and inherit all the latency and resource overhead of web rendering, 120 AI Chat is built natively for each operating system leveraging system-level optimizations, native markdown rendering, and hardware-accelerated graphics to deliver an interface that feels as responsive as a local application even when communicating with remote AI APIs.

This performance focus makes 120.dev particularly appealing to power users, developers, and professionals who use AI tools intensively throughout the workday.

120 AI Chat supports multi-threaded conversations, allowing users to run multiple simultaneous AI sessions in parallel without performance degradation. A knowledge retrieval system with citations enables users to attach documents and get AI responses grounded in specific source material.

The built-in prompt library lets users save and organize frequently used prompts for quick reuse, while the code-friendly UI provides native syntax highlighting and proper formatting for technical conversations with AI models.

The 120.dev ecosystem extends beyond chat. 120 HN is a native Hacker News reader with AI summarization that distills discussion threads and article content into key takeaways.