Grok Imagine Video 1.5
Grok Imagine Video 1.5 is xAI’s short video model. You can generate from a prompt, animate a still, or condition on reference images. Clips run from 1 to 15 seconds, default 6. Generate resolutions are 480p, 720p, and 1080p. Reference tops out at 720p. Aspect ratios are 16:9, 1:1, 9:16, 3:2, and 2:3.
There is no native-audio flag. Animate does not take a last frame. Reference is stills only — no reference video and no reference audio.
The 1-second minimum is unusual. It is there so you can test a subject quickly before committing to a longer clip.
What it's good for
Short, stylized motion in the Grok look, including still-conditioned clips. Restrained documentary realism is not what this model is for. Sound is a separate step.