ComfyUI LMStudio Nodes (Unofficial)

Small ComfyUI custom nodes to connect to a remote LMStudio server through OpenAI-compatible API (/v1).

Nodes

• LMStudio - Connect

  • Connect to a remote LMStudio URL
  • Pick the model from a dropdown populated by Refresh Models
  • Test connectivity to the server
  • Thinking / Reasoning control — auto / on / off:
    • auto — defer to the model, but force reasoning on for families that stay silent by default (Gemma). Qwen3-style models already think by default.
    • on — force reasoning on (enable_thinking: true).
    • off — suppress reasoning so the model answers directly and doesn't burn its token budget on a hidden <think> trace.
  • Advanced: API token, Tooling / MCP toggle, max tokens, temperature, timeout

• LMStudio - Text Gen

  • System prompt + user prompt
  • Text generation through the shared connection
  • <think>...</think> blocks are stripped from response output

• LMStudio - Image To Text

  • System prompt + user prompt + image input
  • Image description / caption style generation
  • <think>...</think> blocks are stripped from response output

Quick start

1. Put this folder in ComfyUI/custom_nodes/
2. Install deps:

   pip install -r requirements.txt
   

3. Restart ComfyUI

Testing

Run the Python unit tests with coverage gate (>=90%):

pytest -q

Notes

• This is not an official LMStudio project.
• Not affiliated with LMStudio.
• It is a quickly vibecoded utility project.

References

• LMStudio OpenAI compatibility docs
• ComfyUI custom node docs