ActionxAIUpdated September 2026

How do I call Grok from a workflow?

Short answer: You can chat completion in xAI by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the xAI Chat Completion action to a workflow, map its 7 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.

Chat Completion in xAI — start free All 4 xAI actions

Chat Completion in xAI — start free

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	Which model to use
User Message message	string	Required	User message to send to the model
System Prompt system_prompt	string	Optional	Optional system instructions that shape the model's behavior
Temperature temperature	string	Optional	Sampling temperature (0–2). Higher = more random.
Max Tokens max_tokens	string	Optional	Maximum tokens to generate in the response
Top P top_p	string	Optional	Nucleus sampling threshold (0–1)
Response Format response_format	options	Optional	Force JSON output (model must support JSON mode)

Sample request

{
  "model": "{{trigger.model}}",
  "message": "e.g. Summarize this article in 3 bullets",
  "system_prompt": "e.g. You are a helpful assistant.",
  "temperature": "0.7",
  "max_tokens": "1024"
}

Returns

{
  "id": "chatcmpl-abc123",
  "model": "grok-4",
  "usage": {
    "total_tokens": 60,
    "prompt_tokens": 10,
    "completion_tokens": 50
  },
  "choices": [
    {
      "message": {
        "role": "assistant",
        "content": "Sample response"
      },
      "finish_reason": "stop"
    }
  ]
}

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

Triggered by

Apps that pair well as the trigger for Chat Completion.

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

2 Google Sheets triggers

HubSpot → xAI

18 HubSpot triggers

FAQ

Questions about Chat Completion.

What does the Chat Completion action do in xAI?

Sends a message to a Grok model on xAI and gets a response. Grok models lean into real-time, web- and X-aware answers; OpenAI-compatible request shape.

What inputs does Chat Completion require?

Required: Model, User Message. 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 xAI returns an error?

The run history shows the failed step with its input and the error message xAI 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 Chat Completion support batch operations?

Run Chat Completion 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 xAI's rate limits.

More actions

Other xAI actions.

Action

Generate Image

Generates an image using Grok's image models with looser content filters than the OpenAI defaults. Useful for branding, social posts, and creative work where Grok's style fits.

Action

List Models

Lists available models on xAI (Grok family) with their context windows and pricing tier. Useful for surfacing a dynamic model picker.

Action

Grok Live Search

Chats with Grok with Live Search enabled, so Grok pulls fresh web and X results at request time and folds them into the answer. Grok's defining differentiator over other LLM APIs.

Chat Completion in xAI — start free