KIE Grok Imagine (T2V)

The plainest member of the Grok Imagine family: prompt in, short video out, no images required. KIE Grok Imagine (T2V) is the text-to-video node of the pack's Grok group, and its headline feature is the mode dropdown - including spicy, xAI's much-discussed less-restrictive content mode that the other closed video APIs won't offer. If you've ever been told "no" by a video API's content filter, this node exists to be the one that says "maybe."

To be clear about the trade: Grok's video output is short (6–15s), modest resolution (480p/720p), and the model's polish isn't Veo's. This is a "get the idea out of your head" video node, not a portfolio-grade renderer. For quick motion tests and storyboards, that's exactly the right tool.

How it works

Standard KIE video job flow: your prompt becomes a createTask with the Grok Imagine T2V model id, and the node polls recordInfo every 10 seconds until the job lands (2000-second timeout, auto-retry on transient errors). The finished clip comes back as a ComfyUI VIDEO.

The inputs that matter

• prompt - required, up to 5000 chars. Write the motion and scene; there's no image to carry the subject, so the prompt does all the work.
• mode - normal (default), fun, or spicy. fun is the looser/playful tone; spicy is the permissive content mode. Note that in the pack's own docs, the spicy path is really at home when you're chaining from a Grok image generation (task_id) - T2V's spicy is available here, but if you hit a wall on content, the I2V + task_id route is the documented escape hatch.
• aspect_ratio - 16:9 default; options 2:3, 3:2, 1:1, 9:16, 16:9.
• duration - 6 (default), 10, or 15 seconds.
• resolution - 480p (default) or 720p.

Output: video, ready for preview or a saver.

Installing

Installs with the pack. ComfyUI Manager: search "ComfyUI Kie API". Or:

cd ComfyUI/custom_nodes
git clone https://github.com/gateway/ComfyUI-Kie-API
# restart ComfyUI

No models to download. API key at config/kie_key.txt in the pack folder (copy from kie_key.example.txt).

Where people get burned

Manage expectations on speed and quality - Grok T2V is a draft tool, not a finale. The spicy mode is permissive, not limitless: prompts that trip a content filter fail with a server-side error, and kie.ai/logs plus the console state log are where you'll see the actual reason. Credits are the other reality check - every run costs, and 15s/720p runs are the priciest seats. Draft at 6s/480p and upgrade only for the keepers. If a job seems to hang, remember the 2000-second timeout is by design; don't kill a working run.