Veo 3.1 Lite vs Grok Imagine 1.5 Lite for short AI video

Veo 3.1 Lite and Grok Imagine 1.5 Lite are the lower-cost video tiers from Google and xAI. Each one builds a short clip with sound from a text prompt or a single starting image. Both run in Picsart AI Playground, so one prompt can go through both.

Neither one wins on paper, because each is shaped for a different job. Veo 3.1 Lite makes the focused pick for 16:9 or 9:16 clips of 8 seconds or less, with a 720p or 1080p choice. Grok Imagine 1.5 Lite makes the roomier pick for square and photo-style frames, clips up to 15 seconds and scenes built around a spoken line.

Veo 3.1 Lite and Grok Imagine 1.5 Lite at a glance

Here is how the two compare on paper, using the settings each one offers in Picsart.

Same tier, different shape

Both models play the same role in their families. Veo 3.1 Lite is the lower-cost tier of Veo 3.1, aimed at high-volume work, with the flagship Veo 3.1 above it. Grok Imagine 1.5 Lite has the lowest cost per second in the Grok Imagine 1.5 line, and xAI points to it for straightforward clips.

The split shows up in the settings. Veo 3.1 Lite keeps a short menu of two ratios, three lengths and two resolutions. Grok Imagine 1.5 Lite spreads wider, with seven ratios and seven lengths. Google also lists Veo 3.1 Lite as a preview model, listed as Veo 3.1 Lite Preview.

Frame shape and aspect ratio

Veo 3.1 Lite offers exactly two frames: 16:9 and 9:16. Those cover the two everyday homes for short video, a landscape player and a vertical feed.

Grok Imagine 1.5 Lite keeps those two and adds five more. Square 1:1 suits a grid post. The 4:3 and 3:4 pair fits slides and portrait framing, while 3:2 and 2:3 echo a camera photo.

Clip length: 4 to 8 seconds or 3 to 15

Veo 3.1 Lite runs 4, 6 or 8 seconds, and 8 is preselected. That ceiling fits one action, one reveal or one beat inside a longer edit.

Grok Imagine 1.5 Lite starts lower, at 3 seconds, and climbs through 5, 6, 8, 10 and 12 up to 15. The extra room holds a scene with a setup and a payoff. The two menus overlap at 6 and 8 seconds. Those are the lengths to use for a fair side-by-side test.

Veo 3.1 Lite resolution and Grok’s upscaled 1080p

Veo 3.1 Lite asks for a resolution up front, either 720p or 1080p. The lower setting suits rough drafts, and 1080p fits a clip headed for a finished post. 4K is off the menu, since Google states the model does not output it. Google also lists a frame rate of 24 FPS.

Grok Imagine 1.5 Lite takes a different road to the same number. xAI says it reaches 1080p by rendering at 720p and then upscaling. In that family, the full Grok Imagine 1.5 model is the one that renders 1080p natively.

Sound and spoken lines

Neither model hands back silent footage. Veo 3.1 Lite outputs video with audio, and Grok Imagine 1.5 Lite adds an audio track to every clip by default. Ambient noise, footsteps and music cues all belong in the prompt for both.

Speech is where the documentation differs. xAI states that Grok Imagine 1.5 Lite produces lip-synced speech. That makes it the documented pick for a clip that hinges on a character saying a line out loud.

Starting from an image

Both models accept one image next to the prompt. In Picsart, Veo 3.1 Lite labels its slot Start, and the picture opens the clip. Grok Imagine 1.5 Lite labels its slot Reference, and xAI says the image becomes the first frame there as well.

Its output copies the frame shape of the uploaded picture, so the ratio picker stops mattering. Trim the still to its final frame shape before uploading. For a matched test, a still already cut to 16:9 or 9:16 suits both models.

New clips, not edits

Both Lite models are generators. Each one builds a fresh clip from text or one image. On the Grok side, reworking or lengthening a finished clip falls to Grok Extend Video and its sibling entry, Grok Edit Video.

Which Lite model for which job

The right pick follows the settings the job needs.

• Vertical reels or 16:9 B-roll of 8 seconds or less: either model works, and Veo 3.1 Lite adds a 720p or 1080p choice.
• Square grid posts and photo-style frames: Grok Imagine 1.5 Lite, which carries 1:1, 4:3, 3:4, 3:2 and 2:3.
• Scenes longer than 8 seconds: Grok Imagine 1.5 Lite, with lengths up to 15 seconds.
• A 3-second loop: Grok Imagine 1.5 Lite, since Veo 3.1 Lite starts at 4 seconds.
• A character speaking to camera: Grok Imagine 1.5 Lite, with lip-synced speech in its documentation.

Prompts that run on both models

Veo 3.1 Lite reads up to 1,024 tokens of prompt text, and Google lists English as its prompt language. A shared prompt should stay in English and inside that cap. Each one below does, and it fits 16:9 or 9:16 and 8 seconds. Set the ratio and length named in the label.

Pottery wheel, 9:16, 6 seconds

Vertical close shot of wet hands shaping a clay bowl on a spinning potter’s wheel, slip spattering onto a canvas apron, dusty window light, the camera rising slowly to the potter’s focused face, the hum of the wheel motor and water dripping into a bucket

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Bakery start frame, 9:16 still, 8 seconds

Starting from this frame, the baker slides a tray of braided loaves onto the counter, flour drifts through a beam of window light, the camera eases in toward the steaming bread, a metal tray clattering and a quiet radio in the back room

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Bookshop exchange, 16:9, 8 seconds

Medium shot inside a small bookshop at closing time, the owner stacks paperbacks while a teenager holds up a worn atlas and asks, “Is this the last copy?” The owner smiles and answers, “Only if you promise to read it.” Warm lamp light, rain tapping the front window, pages rustling

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How to test Veo 3.1 Lite against Grok Imagine 1.5 Lite

Both models sit in Picsart AI Playground, so a head-to-head takes one prompt and two runs. Open Veo 3.1 Lite and Grok Imagine 1.5 Lite side by side. Match every setting the two share, then change only the model.

Run one prompt through both Lite models

Open AI Playground, paste a shared prompt into Grok Imagine 1.5 Lite, then switch to Veo 3.1 Lite and run it again.