SkyReels-V4 is a free multi-modal AI video and audio generator that produces 1080p, 32 FPS, up to 15-second videos with synchronized audio from text, images, masks, or audio references using a dual-stream MMDiT architecture.
What is SkyReels-V4?
SkyReels-V4 is a unified multi-modal video foundation model for joint video and audio generation, inpainting, and editing. It accepts inputs including text descriptions, reference images, video clips, binary masks for inpainting, and audio samples, and outputs high-definition video with perfectly matched audio in a single forward pass. The platform runs online at skyreels-v4.org and is developed by the SkyReels team. Unlike earlier versions (SkyReels V3 and V2), V4 employs a dual-stream MMDiT architecture that jointly processes visual and auditory tokens for superior temporal alignment.
Key Features
- Multi-modal generation — Create videos from text, images, masks, or audio references; all inputs are processed within the same model.
- High-quality output — 1080p resolution at 32 FPS for clips up to 15 seconds, with professional-grade visual clarity.
- Native audio synchronization — Video and audio are generated jointly, ensuring lip movements, environmental sounds, and music align perfectly with visual content.
- Video inpainting — Remove, replace, or modify specific regions in existing footage using binary masks, with temporal coherence across frames.
- Free access — No credit card required to start; the free tier includes full access to the dual-stream MMDiT model for text-to-video and image-to-video generation.
- Fast generation — Optimized inference completes each clip in seconds, enabling rapid iteration.
- Multi-shot narrative — Create stories with consistent characters and audio across multiple camera angles.
- API for developers — Integrate text-to-video, image-to-video, inpainting, and batch processing into production applications via REST API.
Who is it for?
- Content creators — Generate cinematic social media videos with synchronized audio quickly, without needing separate audio editing tools.
- Filmmakers — Produce multi-shot narrative films with character consistency and audio continuity, accessible to independent creators.
- Marketers — Scale ad creation by generating complete audiovisual product promotions from a single prompt or image.
- Video editors — Leverage native video inpainting to remove objects, replace backgrounds, or repair footage with temporal precision.
- AI researchers — Use the model as a foundation for multi-modal generation and inpainting research; the dual-stream MMDiT architecture is described in arXiv 2602.21818.
What can you do with SkyReels-V4?
- Cinematic content creation — Filmmakers use the multi-shot narrative system to produce YouTube, TikTok, and Instagram content with consistent characters and audio across angles.
- Video editing and inpainting — Editors remove objects, replace backgrounds, and modify regions in existing footage with temporal coherence using binary masks.
- Marketing campaigns — Marketing teams generate product advertisements with matching audio at scale, outputting complete audiovisual content from a single step.
- Research and development — Researchers explore multi-modal generation; developers build production applications via the API.
How does SkyReels-V4 work?
- Access — Visit SkyReels-V4 and start without signup; the free tier is immediately available.
- Input — Type a text prompt or upload reference images, video clips, or audio samples. For inpainting, upload source video and draw a mask.
- Configure — Set resolution (up to 1080p), duration (up to 15 seconds at 32 FPS), audio style, and inpainting parameters.
- Generate — Click generate; the dual-stream MMDiT creates video with synchronized audio in seconds. Download as MP4.
Pricing
SkyReels-V4 offers a free tier with full access to the dual-stream MMDiT model for text-to-video and image-to-video generation. A Pro plan (SkyReels V4 Pro) uses a credits-based system for higher usage limits; during the launch celebration, annual plans are available at 50% off. Specific credit amounts and dollar prices are not listed on the page.
FAQ
Is SkyReels-V4 free to use?
Yes, there is a free tier that provides full access to the dual-stream MMDiT model for text-to-video and image-to-video generation with synchronized audio. No credit card is required to start.
SkyReels-V4 accepts text prompts, reference images, video clips, binary masks for inpainting, and audio samples as multi-modal inputs. These are processed by the channel concatenation formulation within the dual-stream MMDiT.
Can SkyReels-V4 generate audio with video?
Yes, the model jointly generates video and audio tokens in a single forward pass, ensuring lip movements match speech, environmental sounds align with visual events, and musical scores follow the emotional arc.
What is the maximum output quality?
SkyReels-V4 outputs video at 1080p resolution, 32 frames per second, and up to 15 seconds in duration.
Does SkyReels-V4 have an API?
Yes, a REST API is available for developers, supporting text-to-video, image-to-video, inpainting, and batch processing for building production-scale applications.
