Actionfal.aiUpdated September 2026
How do I run a fal.ai model?
Short answer: You can run fal.ai model in fal.ai by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the fal.ai Run fal.ai Model action to a workflow, map its 4 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.
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 ID model_id | string | Required | fal model id |
Prompt prompt | string | Required | Prompt (required) |
Image Size image_size | string | Optional | Image Size |
Num Images num_images | string | Optional | Num Images |
Sample request
{"model_id": "e.g. fal-ai/flux/schnell, fal-ai/flux-pro/v1.1, fal-ai/runway-gen3","prompt": "{{trigger.prompt}}","image_size": "{{trigger.image_size}}","num_images": "{{trigger.num_images}}"}
Returns
{"status": "IN_QUEUE","request_id": "req-abc123","status_url": "https://...","response_url": "https://..."}
Use these fields in downstream nodes for routing, logging, or error handling.
Triggered by
Apps that pair well as the trigger for Run fal.ai Model.
Any of these apps can fire this action as part of a workflow.
FAQ
Questions about Run fal.ai Model.
What does the Run fal.ai Model action do in fal.ai?
Submits an inference request to fal.ai's queue (fast cold starts on diffusion models). Returns a request ID immediately; poll the status endpoint or configure a webhook for completion. For image/video/audio generation workflows where latency matters.
What inputs does Run fal.ai Model require?
Required: Model ID, 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 fal.ai returns an error?
The run history shows the failed step with its input and the error message fal.ai returned, so you can fix the input and run the workflow again. Automatic retries are built into HTTP steps only, where you can also set your own retry count and delay.
Does Run fal.ai Model support batch operations?
Run Run fal.ai Model inside a loop to process each item in an array. TinyCommand does not throttle calls for you, so for large arrays add a Delay step if you need to stay within fal.ai's rate limits.