project
Grok Imagine Video 1.5 - A graphic-based video model launched by xAI
Grok Imagine Video 1.5 is a graph-based video model from xAI, built on the Aurora autoregressive engine. The model supports one-click generation of short videos with native synchronized audio from static graphs, up to 720p resolution, and more...
What is Grok Imagine Video 1.5?
Grok Imagine Video 1.5 is a graph-based video model launched by xAI, built on the Aurora autoregressive engine. The model supports one-click generation of short videos with native synchronized audio from static graphs, with a maximum resolution of 720p. In Fast mode, a 6-second video can be generated in approximately 25 seconds. The model ranks first on Arena.ai's graph-based video leaderboard and is provided via the xAI API on a per-second billing basis.
Main features of Grok Imagine Video 1.5
- Image-based video animationUpload a single static image and provide natural language prompts, and the model can generate a dynamic video that accurately preserves the original image's details, lighting, and composition.
- Wensheng Video GenerationIt supports generating short videos directly from plain text prompts, making it suitable for rapid concept exploration and creative drafts.
- Native synchronized audioIt can simultaneously output video and audio in single-channel generation, including ambient sound effects, background music and lip-sync dialogue, without the need for post-dubbing.
- Video extension and continuationBased on an autoregressive mechanism, it continues to generate subsequent segments from the last frame of the existing video, supporting the concatenation of multiple short shots into a longer scene.
- Multi-scale and multi-resolution outputSupports 7 aspect ratios including 1:1, 16:9, and 9:16, with selectable 480p or 720p resolutions, and a maximum duration of 15 seconds.
Technical Principles of Grok Imagine Video 1.5
- Aurora Autoregressive Engine ArchitectureBased on xAI's self-developed Aurora autoregressive video generation engine, it generates video sequences by predicting frame by frame, and supports autoregressive extension of subsequent content from the last frame, ensuring the temporal continuity of the video movement.
- Native audio and video joint modelingIt generates video frames and audio waveforms simultaneously in a single forward propagation, and achieves precise matching of lip-sync dialogue and ambient sound effects by aligning lip movements, actions and sound effects timestamps through shared latent space.
- Enhanced physical realismThe algorithm for simulating motion continuity and weight perception has been optimized, significantly reducing the illusion of limb distortion and floating objects, making the natural swaying of clothing and the acceleration trajectory of falling objects more closely resemble the real physical world.
How to use Grok Imagine Video 1.5
- Obtain API permissionsVisit the xAI developer platform to register an account and obtain an API Key. The current model ID is [model ID].
grok-imagine-video-1.5. - Construct request parametersSend a request via the xAI API to set the operation type, input mode, resolution (480p/720p), duration, and aspect ratio.
- Submit generation taskUpload a starting image or enter text prompts to describe camera movement, dynamic rhythm, and audio requirements. The model returns the video results asynchronously.
- Enable Fast ModeChoose the Fast version to speed up the generation process; a 6-second 720p video will only take about 25 seconds, a significant reduction from the previous generation's 40 seconds or more.
- Post-extension and screeningThe generated segments undergo quality review, and the video extension function is used to continue generating from the last frame, connecting multiple segments to form a complete narrative.
The core advantages of Grok Imagine Video 1.5
- Number 1 on the list of best-selling videosIt topped the Arena.ai image-to-video benchmark with an Elo score of approximately 1330, a 52-point improvement over its predecessor, demonstrating superior overall performance compared to mainstream competitors.
- Generation speed greatly improvedIn Fast mode, a 6-second 720p video takes only about 25 seconds, which is nearly 40% shorter than the previous generation's 40 seconds or more, making it suitable for high-frequency creative drafts and rapid iteration of social content.
- Accurate and natural audio-visual synchronizationNatively generated synchronized audio significantly improves speech clarity and lip-sync. In actual testing, chewing sounds and hoof sounds can be accurately aligned with on-screen movements.
- Strong sense of physical realismEnhanced motion continuity and weight simulation; clothing sways naturally as characters walk, and falling objects have realistic trajectories, resulting in an overall visual experience close to the real physical world.
The project address for Grok Imagine Video 1.5
- Project official websitehttps://x.ai/news/grok-imagine-video-1-5
Grok Imagine Video 1.5 Competitive Comparison
| Comparison Dimensions | Grok Imagine Video 1.5 | Seedance 2.0 |
|---|---|---|
| Maximum resolution | 720p | 1080p |
| Longest duration | 15 seconds | 20 seconds |
| Native audio | Sound effects + ambient sound + lip-sync | Strong dialogue |
| Image-based video ranking | Arena No. 1 | — |
| Generation speed | 6 seconds 720p Approx. 25 seconds | — |
| Physics simulation | Enhance the sense of weight and momentum | powerful |
| Billing method | Billed per second | Points/Subscription |
Application scenarios of Grok Imagine Video 1.5
- Social short videos are rapidly iteratingHigh-frequency generation of 6–15 second creative short videos, meme animations, and trending content suitable for platforms such as TikTok, Instagram, and Reels.
- Product dynamic advertisementsThis tool converts static images of e-commerce products into short video trailers with camera movement and background sound effects, which can then be used for product detail pages and advertising.
- Character voice-over and narration contentUpload a portrait of a person and enter dialogue to generate a short lip-synced dialogue video, suitable for social media broadcasts, virtual customer service, and knowledge-based short videos.
- Storyboard Animated PreviewIt transforms keyframes from movie or commercial storyboards into dynamic shots, helping directors and producers quickly validate visual rhythm and camera movement schemes before formal shooting.
- Concept Variations and A/B TestingThe advertising team can quickly generate multiple versions of dynamic materials based on the same product image to test the conversion effects of different visual styles and animations.