xAI's Grok Imagine Video 1.5 Lite ships from $0.02 a second
The xAI video model carries per-resolution rates of $0.02 at 480p, $0.03 at 720p and $0.14 at 1080p, the same tiers its flagship model and fal.ai list.
Key takeaways
- xAI's grok-imagine-video-1.5-lite costs $0.02 per second at 480p, $0.03 at 720p and $0.14 at 1080p on xAI's own model documentation.
- The full grok-imagine-video-1.5 model costs $0.08 a second at 480p, $0.14 at 720p and $0.25 at 1080p on xAI's own page, so Lite's 1080p rate equals the flagship's 720p rate.
- Kuaishou's Kling 3.0 Turbo with audio costs 0.8 yuan per second at 720p and 1.0 yuan per second at 1080p, roughly $0.11 and $0.14, on Kuaishou's own developer pricing page.
- Grok Imagine Video 1.5 Lite's 720p rate of $0.03 sits far below Kling 3.0 Turbo's $0.11 audio rate at 720p, and its $0.14 at 1080p lands level with Kling's $0.14.
xAI's cheaper video-generation tier, grok-imagine-video-1.5-lite, is priced per second by resolution in xAI's own API documentation: $0.02 at 480p, $0.03 at 720p and $0.14 at 1080p, with each input image adding $0.01. The same page lists the model as accepting text and images and returning video, supporting the batch API, capped at 10 requests per second, and available in the us-east-1 and us-west-2 regions.
Those three numbers match, tier for tier, what hosting partner fal.ai lists on its lite image-to-video endpoint: $0.02 a second for 480p, $0.03 for 720p and $0.14 for 1080p, plus $0.01 per input image. fal's worked example puts a five-second clip with one input image at $0.11 at 480p, $0.16 at 720p or $0.71 at 1080p. The text-to-video API schema takes a duration parameter, the same three resolutions and seven aspect ratios, with a default duration of six seconds.
The full grok-imagine-video-1.5 model runs the same ladder one tier higher. xAI's own model page lists $0.08 a second at 480p, $0.14 at 720p and $0.25 at 1080p, the identical figures fal's full-model page shows. That makes Lite's 1080p rate of $0.14 identical to the flagship's 720p rate, and every Lite tier cheaper than the matching full-model tier. Both tiers generate audio in the same pass as the video, per fal's product pages.
A third host, Venice, listed Grok Imagine 1.5 Lite on September 30, 2026, describing the same 480p/720p/1080p ladder and a 1 to 15 second duration range with native audio, matching what xAI's and fal's pages show.
Against rivals, Kuaishou's own developer pricing page for Kling lists Kling 3.0 Turbo with audio at 0.8 yuan per second at 720p and 1.0 yuan per second at 1080p, or roughly $0.11 and $0.14 at current exchange rates. Lite's 720p rate of $0.03 sits far below Kling's $0.11 audio tier, while its 1080p rate of $0.14 lands level with Kling's 1080p audio rate.
xAI's own news page carried no separate announcement for the lite tier as of this writing; the model surfaced through its documentation and through launch partner fal.ai instead.
Grok Imagine Video 1.5 Lite is live now on the xAI API and on fal.ai, with text-to-video and image-to-video endpoints, in the us-east-1 and us-west-2 regions.