LLM Prompt Tools | InvokeAI Documentation
LLM Prompt Tools
InvokeAI includes two built-in tools that use local language models to help you write better prompts. Both tools appear as small buttons in the top-right corner of the positive prompt area and are only visible when you have a compatible model installed.
Expand Prompt
Takes your short prompt and expands it into a detailed, vivid description suitable for image generation.
How to use:
- Type a brief prompt (e.g. “a cat in a garden”)
- Click the sparkle button in the prompt area
- Select a Text LLM model from the dropdown
- Click Expand
- Your prompt is replaced with the expanded version
Compatible models: Any HuggingFace model with a ForCausalLM architecture. Recommended options:
| Model | Size | HuggingFace ID |
|---|---|---|
| Qwen2.5 1.5B Instruct | ~3 GB | Qwen/Qwen2.5-1.5B-Instruct |
| Phi-3 Mini Instruct | ~7.5 GB | microsoft/Phi-3-mini-4k-instruct |
| TinyLlama Chat | ~2 GB | TinyLlama/TinyLlama-1.1B-Chat-v1.0 |
Install by pasting the HuggingFace ID into the Model Manager. The model is automatically detected as a Text LLM type.
Image to Prompt
Upload an image and generate a descriptive prompt from it using a vision-language model.
How to use:
- Click the image button in the prompt area
- Select a LLaVA OneVision model from the dropdown
- Click Upload Image and select an image
- Click Generate Prompt
- The generated description is set as your prompt
Compatible models: LLaVA OneVision models (already supported by InvokeAI).
Undo
Both tools overwrite your current prompt. You can undo this change:
- Press Ctrl+Z (or Cmd+Z on macOS) in the prompt textarea within 30 seconds
- The undo state is cleared when you start typing manually
Workflow Node
A Text LLM node is also available in the workflow editor for use in automated pipelines. It accepts a prompt string and model selection as inputs and outputs the expanded text as a string.