Chat with open AI models. Free.
Pick a model and start typing — no account, no sign-up. Answers stream in, and models that think can show their work. History stays on this device.
Pick up where you left off
Pick a model and start typing — no account, no sign-up. Answers stream in, and models that think can show their work. History stays on this device.
Pick up where you left off
Takes 10 seconds. No chat text is sent.
Thanks — your feedback helps us improve UsingOpen.
This site, but on your computer.
The complete package of apps to run models on your own machine: chat, fine-tune, export, images, audio. Private by default, unlimited messages, no API bills — pay once, yours forever.
License key emailed after payment. Windows, macOS, Linux.