Where do I put the Qwen 3.0 model file and how do I load it?

Place qwen_3_4b.safetensors in ComfyUI/models/text_encoders, then select it in the CLIPLoader node. The TextGenerate node will use the loaded model handle automatically.

How do I control response style, length, and creativity?

Use a clear instruction at the top of your prompt to set style and format. For length, increase max new tokens. For creativity vs. determinism, raise or lower temperature (and optionally adjust top_p).

The output stops mid-sentence. What should I change?

Increase max new tokens so the model can finish, and make sure you are not using stop sequences that prematurely cut output. If you run low on memory, try shorter outputs and iterate.

Can I run this on CPU or a smaller GPU?

Yes, but generation will be slower and you may need to reduce max new tokens. If the node exposes precision or memory-saving options, enable them. Close other GPU-heavy apps to free VRAM.

Qwen3.0: Text Generation - ComfyUI Workflow

This ComfyUI workflow turns Qwen 3.0 (4B, Thinking variant) into a drop-in text generator you can run inside a node graph. It loads the Qwen3-4B-Thinking weights with CLIPLoader, feeds your prompt and decoding settings to TextGenerate, and displays the final text in PreviewAny for quick copy-out. A MarkdownNote node is included in the graph with usage tips so you can remember the key parameters at a glance.

Under the hood, TextGenerate performs standard autoregressive decoding with adjustable parameters like temperature, top_p, and max new tokens. CLIPLoader is used here to point ComfyUI at the Qwen 3.0 text encoder weights (qwen_3_4b.safetensors) stored in models/text_encoders. The result is a compact, reproducible setup for generating detailed, reasoned responses, ideal for drafting explanations, outlining ideas, and iterating on prompt engineering directly in ComfyUI. As of 2026/03, ComfyUI supports the 4B Qwen 3.0 model for this workflow.

API

Use this workflow from code

Every Comfy workflow is a JSON graph. The payload below is this workflow, exactly as ComfyUI runs it — fetch it from the URL, keep it in version control, or load it in ComfyUI and run it node by node.

llm_qwen3_text_gen.json

Fetching workflow JSON…

Run it from TypeScript or Python with the Comfy SDK. The same code targets Comfy Cloud or a ComfyUI you host yourself — only the base URL changes.

// Install (beta)
npm i @comfyorg/sdk

// Run this workflow (TypeScript)
import { Comfy } from "@comfyorg/sdk";

const client = new Comfy({ apiKey: "comfyui-..." });
const wf = await client.workflows.fromFile("workflow_api.json");
const job = await client.run(wf);
await job.getOutputs("<output-node-id>")[0].toFile("output.png");

The SDK takes a workflow in API format: open this workflow in ComfyUI and use File → Export Workflow (API).

Comfy Cloud API access requires a plan with an API key.

SDK docs Get an API key

FAQ

Frequently Asked Questions