Grok Imagine 1.5 Text to Video: Prompts to Clips with Sound
Last verified: October 19, 2026
Grok Imagine 1.5 turns a written description into a short video clip with generated sound. Here you can shape that clip as a tall 2:3 portrait or a wide 3:2 landscape, as well as square, vertical or widescreen. Grok Imagine 1.5 text-to-video needs nothing but words. The subject, the movement and what the viewer hears all come from your prompt, so an idea can become a clip you post or drop into an edit.
In this mode the model works in two stages. xAI pairs its image generation with image-to-video, so Grok Imagine 1.5 first generates an opening frame from your prompt and then animates it. That order matters when you write: composition, lighting and visual style are all decided in that first image, before anything starts to move.
The form only asks for the choices that change a clip: the prompt, how long the clip runs, how sharp it renders and what shape it takes. That keeps the loop short. Write, generate, download, watch with the sound on, then fix the parts of the prompt where the result drifted from what you meant.
Explore more text to video
Grok Imagine 1.5 Settings at a Glance
The input, clip lengths, resolutions, frame shapes and output this generator works with.
Input
A text prompt of up to 2,048 characters
Video Duration
3 to 15 seconds
Resolution
480P or 720P
Aspect Ratio
1:1, 2:3, 3:2, 9:16, 16:9
Output
1 video per run
Prompting Tips for Better Grok Imagine 1.5 Clips
Describe the Opening Frame Before the Action
Write the Motion as Changes to That Frame
How to Make a Video with Grok Imagine 1.5
Four steps from a written idea to a downloaded clip.
Write Your Scene in the "Prompt" Box
Type your description into the "Prompt" box. It is required and holds up to 2,048 characters, which is room for a full shot description, so spend it on concrete detail rather than stacked adjectives. If you only have a rough idea, click the "Enhance Prompt" button under the box for fuller versions. Your text stays as written unless you pick one of the suggestions.
Set "Video Duration", "Resolution" and "Aspect Ratio"
"Video Duration" runs from 3 to 15 seconds in one-second steps and starts at 3 seconds, which fits a single gesture. Raise it when your prompt has several beats or a spoken line. "Resolution" offers 480P and 720P: test prompts at 480P, when you are judging motion and composition rather than fine detail, and keep 720P for the version you plan to use. "Aspect Ratio" offers 1:1, 2:3, 3:2, 9:16 and 16:9 and defaults to 1:1, so change it before generating if the clip is going to a vertical feed, a widescreen edit or a portrait pin.
Click "Generate" to Render the Clip
Click "Generate" once your prompt and settings are ready. Each run returns one video, so to compare takes or test a reworded prompt, generate again.
Download the Finished Video
Download the result when the run finishes, then watch it with the sound on. Check that the opening matches what you described, that the motion reads clearly and that any spoken line lands. If one of those is off, rewrite that part in the "Prompt" box before the next run.
Text Prompt or Your Own Images: Choosing a Grok Imagine 1.5 Mode
How starting from words compares with starting from pictures you already have.
| Criterion | Grok Imagine 1.5 | Alternatives | Best For |
|---|---|---|---|
| Where the opening shot comes from | The model generates the opening frame from your written prompt and then animates it, so the whole look of the clip comes from your words. | Image-to-video with Grok Imagine 1.5 starts from a still image you provide and animates it according to an optional prompt. | If you have an idea but no artwork, stay with text-to-video; if the clip must open on an exact picture you already own, image-to-video is the better fit. |
| Showing a specific person, product or outfit | Every subject is defined by the description you write, which fits invented characters, stock-style scenes and concepts that do not need to match an existing photo. | Reference-to-video with Grok Imagine 1.5 takes reference images and works the people, objects or clothing in them into a new shot without fixing the first frame. | Brands that need a real product or a recurring character on screen should look at reference-to-video, while original concepts that exist only in words belong in text-to-video. |
Grok Imagine 1.5 Problems and How to Fix Them
Problems people hit when generating from text, and what to change.
My video got blocked or came back without a clip
Generation failed with an error even though my prompt looks fine
My prompt doesn't fit in the box
The clip ends before the action I described finishes
Frequently Asked Questions
Can Grok Imagine 1.5 make a video from text alone?
Yes. xAI documents text-to-video as a live mode of Grok Imagine 1.5, producing video from a prompt alone. The generator here is built for that: you write the prompt, choose the clip settings and get a finished video back, with no image needed.
How do I make a longer video with Grok Imagine 1.5?
A single clip can only be as long as the longest Video Duration option. For a longer piece, plan it as a sequence of shots and generate each one as its own clip. Repeat the same description of the characters, setting and lighting in every prompt, then join the clips in a video editor. Using the same Aspect Ratio and Resolution for every shot helps the cuts match.
Why does one Grok Imagine 1.5 video cost more credits than another?
The credit cost of a run is calculated from the options you choose and shown above the Generate button once you are signed in. It changes with Video Duration and Resolution, so check that figure again after you adjust either one. The Enhance Prompt button does not use credits.
Can I get several versions of the same prompt?
Yes, by generating again. Run the same prompt a second time for another take, or change one detail at a time, such as the camera move, the light or a spoken line, so you can tell which change made the difference.