zhenzhen-grok-image

xAI's image model - grok-4.2-image, aka Grok Imagine - wrapped for ComfyUI, with a light async mode and multi-image editing. Comfly_grok_image takes a prompt plus up to four reference images (or image URLs, if your references are already hosted) and generates or edits. It's the image sibling to the Grok video nodes, and it's the quiet utility player in the pack: not the flashiest model on the roster, but fast, cheap-ish, and reliable when you need a Grok-flavored result in your graph.

The mechanism is the standard relay pattern: upload your images to the file endpoint, submit the job (async by default via async_mode), poll until it's done, download, and return an IMAGE tensor. The async default matters because image jobs on Grok can take a while, and async means ComfyUI keeps breathing while it renders.

The inputs that matter

• prompt - the generation or edit instruction.
• model - grok-4.2-image, fixed for now (the changelog mentions grok-imagine-2 as work-in-progress; when it lands, it'll presumably be a dropdown choice).
• aspect_ratio - a free STRING, default 1:1. Type what you need (16:9, 9:16, 4:3...). Unlike the dropdown-driven nodes, this one trusts you to type a valid value.
• image1–image4 - reference images for editing, or image_urls - a text field with URLs separated by newlines or commas. The tooltip is explicit about the format.
• image_way - image_url (default) or base64 for how references travel.
• async_mode - true by default; with task_id you can also query an existing async job instead of submitting a new one.
• poll_interval and max_poll_attempts - the wait loop (default 180 × 5s = 15 minutes).

Outputs: image (IMAGE tensor), image_urls (hosted results), and response (JSON).

Install and key

cd ComfyUI/custom_nodes
git clone https://github.com/T8mars/Comfyui-zhenzhen

Restart, or ComfyUI Manager → "Comfyui-zhenzhen". Key from ai.t8star.org into api_key.

Notes

If you're feeding image_urls, use real, stable URLs - signed, time-limited links will expire mid-job and cost you a retry. When you mix local images and URLs, the node handles both, but keep one image_way consistent for your reference transport. The usual pack caveats apply: transient 500s re-run clean, async means the task_id is your handle into the site's job list, and your images and prompt leave the machine. It's a workhorse node - nothing exotic, just Grok image generation done without a fuss.