Generate Image with Flux: Black Forest Labs action

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Model model	options	Required	Model. Options: Flux Pro 1.1 Ultra (best), Flux Pro 1.1, Flux Dev (cheap) …
Prompt prompt	string	Required	Prompt (required)
Width width	number	Optional	Width
Height height	number	Optional	Height
Prompt Upsampling prompt_upsampling	options	Optional	Prompt Upsampling. Options: No, Yes

Sample request

{
  "model": "{{trigger.model}}",
  "prompt": "{{trigger.prompt}}",
  "width": "{{trigger.width}}",
  "height": "{{trigger.height}}",
  "prompt_upsampling": "{{trigger.prompt_upsampling}}"
}

Returns

{
  "id": "task-abc123",
  "polling_url": "https://api.bfl.ai/v1/get_result?id=task-abc123"
}

Use these fields in downstream nodes for routing, logging, or error handling.

FAQ

Questions about Generate Image with Flux.

What does the Generate Image with Flux action do in Black Forest Labs?

Text-to-image generation across Flux variants (Schnell for fastest/cheapest, Dev for open-weights, Pro for highest quality, Ultra for strongest text rendering). Returns a task ID; poll Get Result for the finished image URL.

What inputs does Generate Image with Flux require?

Required: Model, Prompt. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Black Forest Labs returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Generate Image with Flux support batch operations?

Yes. Run Generate Image with Flux inside a Loop node to process arrays. Tiny Command handles Black Forest Labs's rate limits automatically so you don't have to throttle manually.

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