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LLM

The LLM node generates text from a prompt, using a language model you choose. Use it to write scripts, captions, ideas, or any other text your workflow needs.

Inputs and outputs

Inputs (all optional): Image, Texts, Prompt, and a generic Flow input for connecting from earlier nodes.

Output: a single Text handle.

Writing a prompt

Type your prompt directly into the box at the bottom of the card ("Describe what to generate..."). If the Prompt input is already connected from another node, this box is disabled and shows "Prompt connected from input" instead.

The generated text appears in a scrollable area at the top of the card. Click Copy to copy it to your clipboard.

Choosing a model

Click the model picker in the settings bar to search and choose a model. Type to filter, and results are grouped by provider, with prices shown where available.

The default model is Claude Sonnet 4.6, or the closest equivalent on your chosen provider.

The LLM node also lets you override which provider serves its models, using the Provider dropdown: Default (Settings), fal.ai, OpenRouter, or Kie AI. This is one of the few node types where you can set a provider per node instead of always following your account default.

  • On Kie AI, you choose from a fixed list that includes Claude, GPT, and Gemini models.
  • On fal.ai and OpenRouter, the list is pulled live and includes the newest models from Claude, ChatGPT, Gemini, DeepSeek, Llama, Qwen, Grok, Kimi, and GLM.
  • If the live list can't load, a small fallback list is shown instead.

Running the node

Select the node to reveal its Run button in the top right corner of the card. What happens when you click it depends on what's connected:

  • A standalone node with no inputs runs itself. Click Run again to also run everything connected after it.
  • If its inputs already have results, running it also runs everything downstream.
  • If its inputs aren't ready yet, you'll be asked to choose between running the whole workflow, or running everything up to and including this node.

Click the Inputs / Outputs button (an eye icon) at any time to see exactly what data went into this node and what came out.

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