ActionGoogle Vertex AIUpdated May 2026

How do I generate images with Imagen on Vertex AI?

Short answer: Drop the "Google Vertex AI → Imagen Generate" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 3 Google Vertex AI actions

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	Optional	Model. Options: Imagen 4, Imagen 3 Fast
Prompt prompt	string	Required	Prompt (required)
Number of Images sample_count	string	Optional	Number of Images
Aspect Ratio aspect_ratio	options	Optional	Aspect Ratio. Options: 1:1, 16:9, 9:16 …

Sample request

{
  "model": "{{trigger.model}}",
  "prompt": "{{trigger.prompt}}",
  "sample_count": "{{trigger.sample_count}}",
  "aspect_ratio": "{{trigger.aspect_ratio}}"
}

Returns

{
  "predictions": [
    {
      "mimeType": "image/png",
      "bytesBase64Encoded": "<base64>"
    }
  ]
}

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

Triggered by

Apps that pair well as the trigger for Imagen Generate.

Any of these apps can fire this action as part of a workflow.

Gmail → Google Vertex AI

1 Gmail triggers

Slack → Google Vertex AI

13 Slack triggers

Google Sheets → Google Vertex AI

2 Google Sheets triggers

HubSpot → Google Vertex AI

18 HubSpot triggers

FAQ

Questions about Imagen Generate.

What does the Imagen Generate action do in Google Vertex AI?

Generates images using Imagen on Vertex AI, the enterprise-tier image model with prompt-rewriting controls, safety filters, and retention controls suitable for regulated workloads.

What inputs does Imagen Generate require?

Required: 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 Google Vertex AI 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 Imagen Generate support batch operations?

Yes. Run Imagen Generate inside a Loop node to process arrays. Tiny Command handles Google Vertex AI's rate limits automatically so you don't have to throttle manually.

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