Question 1

Which open AI models can I chat with on UsingOpen?

Accepted Answer

UsingOpen offers open-weight models including GLM 5.3 Flash, Qwen3.8, Nemotron Lightning, DeepSeek V4, Gemma 4, GPT-OSS 120B, Muse Glimmer, MiniMax M3 and Inkling Small. Availability is shown live — paused models are greyed out.

Question 2

Is UsingOpen free? Do I need an account?

Accepted Answer

Yes, UsingOpen is free with no account. Your chat history is saved only on your device and never sent to our servers. Pick a model and start chatting; answers stream in and reasoning models can show their thinking.

Question 3

Can I see a model's thinking and copy answers?

Accepted Answer

Yes. Reasoning models show their thinking in an expandable panel, every answer has a copy button, and code blocks have their own copy buttons.

Use any open model.