Grok Imagine vs Kling is a fast clipper versus a longer cinematic engine. Grok Imagine Video 1.5 renders 1–15 s clips with native lip-synced audio from up to 14 references; Kling 4.0 runs single videos up to 30 s at 720p/1080p with up to 10 keyframes. Here is the spec-by-spec breakdown.
imaginegrok.org is independent and is not affiliated with xAI, X, Kling, or Kuaishou. The generator on this site runs Grok Imagine video only — short image-to-video clips at 480p or 720p from one still. This Grok Imagine vs Kling comparison — specifically Grok Imagine vs Kling 4.0 — is drawn from the xAI developer docs (read November 4, 2026) and the Kling API docs, whose updates page is dated October 28, 2026.
The workspace on this page runs Grok Imagine video — short image-to-video clips at 480p or 720p from one still. It does not run Kling. Use the Grok Imagine vs Kling breakdown below to decide which engine your brief needs.
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This workspace runs Grok Imagine image-to-video — it animates one still. It does not run Kling.
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This Grok Imagine vs Kling demo shows only the Grok Imagine side: a roughly 6 s image-to-video clip with native audio, made with the site operator's assistant tools. We did not render a Kling 4.0 clip for this page, so there is no side-by-side — and this example was not rendered on imaginegrok.org's public generator API.
Four clear steps from prompt to finished output — built for creators who want results without an X Premium maze.
Grok Imagine Video 1.5 takes text and image prompts, up to 14 reference images and 3 voice references, plus a first frame, a last frame, and up to 4 interior keyframes. Clips run 1–15 s at 480p, 720p, or native 1080p with native audio and lip-synced speech.
Kling 4.0 runs text-to-video, image-to-video, and Omni reference-to-video, with prompts up to 26,000 English characters and up to 15 combined inputs. Omni accepts up to 10 reference images plus 5 reference videos, and single runs reach 30 s at 720p or 1080p, with 10-bit 4K listed as coming soon.
Grok Imagine leans fast social drafts: short clips, native lip-synced speech, nine aspect ratios including 21:9, and cheap 480p seconds on the API. Kling leans longer cinematic and multi-shot work: 30 s runs, adaptive aspect ratios, and Omni control over up to 15 combined inputs.
The Grok Imagine vs Kling decision follows the output. A 15 s talking clip, a voice reference, or a cheap 480p draft leans Grok Imagine. A 30 s multi-shot sequence, 10 pinned keyframes, or reference videos as inputs leans Kling 4.0.
Capabilities tuned for the keyword intent of this page — not a generic feature dump.
Grok Imagine Video 1.5: text/image-to-video, 480p / 720p / native 1080p, 1–15 s per clip, up to 14 reference images and 3 voice references, first/last frame plus up to 4 keyframes, native audio with lip-synced speech, aspect ratios 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9, and 5:2. Kling 4.0: text-to-video, image-to-video, and Omni reference-to-video, 720p / 1080p with 10-bit 4K coming soon, single runs up to 30 s, up to 10 keyframes, up to 15 combined inputs, 21:9 plus adaptive aspect ratios, prompts to 26k characters, native audio always-on.
Grok Imagine Video 1.5 renders 1–15 s clips at up to native 1080p, and the base grok-imagine-video model can extend an existing clip by 2–10 s (capped at 720p). Kling 4.0 renders single videos up to 30 s at 720p or 1080p. The Grok Imagine vs Kling 4.0 length gap (15 s versus 30 s in one run) matters for sequences that must ship as a single clip.
Grok Imagine Video 1.5 ships native audio with lip-synced speech and accepts up to 3 voice references — the strongest talking-clip story on either side. Kling 4.0 lists native audio as always-on for 4.0 generations. For dialogue-driven social clips, Grok's voice references are the differentiator.
Kling 4.0 pins up to 10 keyframes — more than any Grok model. Grok Imagine Video 1.5 pins a first frame, a last frame, and up to 4 interior keyframes on a 1/3-second grid (see /grok-imagine-keyframes). If your storyboard has ten beats, the Grok Imagine vs Kling question answers itself; at four beats or fewer, either engine works.
The xAI API prices Grok Imagine Video 1.5 at $0.08/s 480p, $0.14/s 720p, and $0.25/s 1080p. The Kling API (without input video) prices 4.0 at $0.157/s 720p (1.0 unit) and $0.235/s 1080p (1.5 units); with an input video the unit math changes. Grok is cheaper at 480p and 720p; Kling is cheaper at 1080p. Site credits on imaginegrok.org are a third, separate ledger — a default 5 s 480p clip is 2 credits (/pricing).
Grok Imagine takes up to 14 reference images and 3 voice references. Kling's Omni mode takes up to 10 reference images plus 5 reference videos, within 15 combined inputs. Feeding existing footage as reference is a Kling-side capability; cloning a speaking voice into a clip is a Grok-side one.
imaginegrok.org generates short Grok Imagine image-to-video clips at 480p or 720p from one still. It is independent, not affiliated with xAI, X, Kling, or Kuaishou, and it does not run Kling. A default 5 s 480p clip here is 2 credits — see /pricing. Site credits are unrelated to Kling units and to xAI API prices.
A talking-head social clip, a voice reference, or a cheap 480p draft leans Grok Imagine Video 1.5. A 30 s multi-shot sequence, reference videos as inputs, or ten pinned keyframes leans Kling 4.0. The Grok Imagine vs Kling choice is a length-and-storyboard question before it is a quality question.
The xAI API runs $0.08–$0.25 per second by resolution. The Kling API runs $0.157/s at 720p and $0.235/s at 1080p without input video. On imaginegrok.org, a default 5 s 480p clip is 2 credits — see /pricing. Kling units, xAI API dollars, and site credits are separate ledgers; never blend them.
Four interior beats or fewer, plus a first and last frame: Grok Imagine Video 1.5 handles that in one request (see /grok-imagine-keyframes). Up to ten keyframes: that is Kling 4.0 territory. Storyboard first, then pick the engine that fits the pin count.
Need a subject to speak with a specific voice? Grok Imagine Video 1.5 accepts up to 3 voice references with lip-synced speech. Need ambience over a long cinematic run? Kling 4.0's always-on native audio covers its full 30 s. Match the audio model to the dialogue load.
On imaginegrok.org, the Kling side of this comparison is external — this site's workspace is Grok Imagine image-to-video at 480p or 720p from one still. Start at /grok-image-to-video or /grok-imagine-1-5.
One still in, one short clip out, native lip-synced audio included. The Grok Imagine loop is faster than any cinematic engine when the deliverable is a single social cut.
Kling 4.0's 30 s single runs, 10 keyframes, and Omni reference videos (up to 15 combined inputs) fit multi-shot cinematic work that would need several Grok generations plus stitching.
The xAI API sells Grok Imagine Video 1.5 at $0.08/s 480p to $0.25/s 1080p. The Kling API sells 4.0 at $0.157/s 720p and $0.235/s 1080p without input video. The API math favors Grok at 480p and 720p, Kling at 1080p.
Kling's units and xAI's per-second dollars do not convert, and neither converts to site credits. This page keeps the Grok Imagine vs Kling numbers side by side instead of blending them.
Grok Imagine Video 1.5 (xAI docs: https://docs.x.ai/developers/model-capabilities/video/overview, read 2026-11-04) against Kling 4.0 (Kling API docs: https://kling.ai/document-api, updates page dated 2026-10-28), as documented: | Axis | Grok Imagine Video 1.5 | Kling 4.0 | | Inputs | text-to-video + image-to-video; up to 14 reference images, 3 voice references | text-to-video + image-to-video + Omni reference-to-video; up to 10 ref images + 5 ref videos, 15 combined inputs | | Max duration | 1–15 s per clip (base model extends +2–10 s) | up to 30 s in a single run | | Resolution | 480p / 720p / native 1080p | 720p / 1080p (10-bit 4K coming soon) | | Native audio | yes, lip-synced speech, up to 3 voice references | yes, always-on for 4.0 | | Keyframes | first + last frame, plus up to 4 interior | up to 10 keyframes | | Aspect ratios | 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9, 5:2 | 21:9 plus adaptive aspect ratios | | Prompt length | not stated in the xAI docs | up to 26,000 English characters | | Extension | grok-imagine-video extend adds 2–10 s (source 2–15 s, capped 720p) | longer single runs instead | | API price | $0.08/s 480p, $0.14/s 720p, $0.25/s 1080p | $0.157/s 720p, $0.235/s 1080p (no input video) | | Best fit | fast social drafts, talking clips, cheap 480p seconds | longer cinematic runs, multi-shot, Omni reference control | Read the two columns as different engines. Grok Imagine vs Kling is a 15-second clipper with the best lip-sync story versus a 30-second cinematic engine with the deepest reference control.
Kling API pricing (https://kling.ai/document-api pricing pages, read 2026-11-04): without an input video, Kling 4.0 costs 1.0 unit per second at 720p ($0.157/s) and 1.5 units per second at 1080p ($0.235/s). With an input video the unit math changes — check the Kling pricing page for your exact case, and do not assume consumer-app plan prices from API numbers. xAI pricing (https://docs.x.ai/developers/pricing): Grok Imagine Video 1.5 at $0.08/s 480p, $0.14/s 720p, and $0.25/s 1080p; grok-imagine-video-1.5-lite lower still. So the honest per-second math in the Grok Imagine vs Kling 4.0 ledger: Grok undercuts Kling at 480p ($0.08 — Kling has no 480p tier) and at 720p ($0.14 versus $0.157); Kling undercuts Grok at 1080p ($0.235 versus $0.25). On imaginegrok.org the third ledger is site credits: a default 5 s 480p clip is 2 credits — see /pricing. Site credits are not Kling units and not xAI API dollars.
Frame control is where the two engines genuinely differ. Grok Imagine Video 1.5 pins a first frame, a last frame, and up to 4 interior keyframes on a 1/3-second grid, and adds up to 14 reference images and 3 voice references — so a talking clip can be storyboarded and voiced in one request. The workflow is documented at /grok-imagine-keyframes. Kling 4.0 pins up to 10 keyframes and lets Omni mode take up to 10 reference images plus 5 reference videos, within 15 combined inputs, with prompts up to 26,000 characters. Feeding finished footage back in as a reference is something Grok's API does not list. Extension is the Grok-side answer for length: the base grok-imagine-video model extends a 2–15 s source by 2–10 s, continuing from its last frame, output capped at 720p (https://docs.x.ai/developers/model-capabilities/video/extension). Kling's answer is simply the 30 s single run. Two philosophies: grow the clip, or generate it long.
Pick Grok Imagine when the deliverable is a short clip that talks: 1–15 s, native lip-synced speech, up to 3 voice references, 14 reference images, nine aspect ratios, and API seconds that start at $0.08. That includes every "still to short clip" job this site exists for. Pick Kling 4.0 when the deliverable is long or reference-heavy: single runs to 30 s, 1080p at $0.235/s, up to 10 keyframes, and Omni mode's 10 reference images plus 5 reference videos. Multi-shot cinematic work lives there. If you are already on imaginegrok.org, you are on the Grok Imagine side — short image-to-video clips at 480p/720p from one still. Start at /grok-imagine-1-5 or /grok-image-to-video, and buy volume on /pricing. For other head-to-heads see /grok-imagine-vs-runway, /grok-imagine-vs-veo, and /grok-imagine-vs-seedance; for non-Grok options /grok-imagine-alternative. imaginegrok.org is independent and is not affiliated with xAI, X, Kling, or Kuaishou.
