Qwen Image 2.1 Prompt Enhance Subgraphs

Two basic Prompt Enhance subgraphs for Qwen Image 2.1 that can be copied and pasted into an existing ComfyUI workflow.

This includes separate versions for T2I and I2I.

T2I

Use this for normal text-to-image generation.

It takes your original prompt, sends it through the Qwen Image 2.1 T2I Prompt Enhance model, and outputs the rewritten prompt.

No image input is required.

I2I

Use this for image-to-image/editing workflows.

This version also accepts an image input, allowing the Prompt Enhance model to use the contents of the source image when rewriting the editing prompt.

Controls

Prompt Enhance
Turn this on to use the rewritten PE prompt. Turn it off to bypass Prompt Enhance and return your original prompt instead.

Seed
The seed belongs to the Prompt Enhance text generation, not your image sampler.

Changing the seed can give you a different rewritten prompt or a slightly different interpretation of the same request. If you like the result from a particular seed, keep that seed.

Required PE models

T2I
qwen3.5_9b_qwen_image_2.1_pe_t2i.int8_convrot.safetensors

I2I
qwen3.5_9b_qwen_image_2.1_pe_i2i.int8_convrot.safetensors

My subgraphs currently expect these inside a QwenImage_2.1 folder. If your models are stored somewhere else, simply change the model selected in the loader.

These are intentionally basic utility subgraphs, not complete generation workflows. Copy the appropriate one into your existing Qwen Image 2.1 workflow and connect the resulting string to your normal prompt encoding path.