LongCat Avatar Audio-Driven AI Avatar for Long Video Generation
LongCat Avatar is a state-of-the-art audio-driven avatar model designed specifically for long-duration video generation. Built on the powerful LongCat-Video architecture, it delivers super-realistic lip synchronization, natural human dynamics, and long-term identity consistency, even across infinite-length video sequences.
Key Features of LongCat Avatar
Built for creators who demand professional quality without the complexity.
Unified Multi-Mode Generation
LongCat Avatar supports Audio-Text-to-Video (AT2V), Audio-Text-Image-to-Video (ATI2V), and Audio-conditioned Video Continuation within a single unified framework. This makes LongCat Avatar extremely flexible for both creative and production-level workflows.
Long-Sequence Stability at Scale
Through Cross-Chunk Latent Stitching, LongCat Avatar prevents pixel degradation and visual noise accumulation, ensuring seamless quality across long videos without quality collapse.
Natural Human Dynamics Beyond Speech
The Disentangled Unconditional Guidance mechanism decouples audio signals from motion dynamics. As a result, LongCat Avatar produces natural gestures, idle movements, and expressive behavior, even during silent segments.
Identity Preservation Without Copy-Paste Artifacts
With Reference Skip Attention, LongCat Avatar maintains character identity while avoiding the rigid "copy- paste" appearance seen in reference-heavy models.
Multi-Person & Infinite-Length Support
LongCat Avatar natively supports multi-person interactions and theoretically infinite-length video generation, making it suitable for complex conversations and long-form content.
Efficient High-Resolution Inference for Production Deployment
Leveraging a coarse-to-fine generation strategy and Block Sparse Attention, LongCat Avatar achieves fast 720p/30fps video synthesis while maintaining visual fidelity. This efficiency makes the model practical for real-world production pipelines, enabling rapid iteration and scalable deployment across long or complex video tasks.
Introduce LongCat Avatar
LongCat Avatar is an advanced audio-driven video generation model focused on realism, temporal stability, and expressive motion. It is designed to overcome the key limitations of existing avatar systems that struggle with long-duration sequences.
By rethinking how speech, motion, and identity interact, LongCat Avatar enables highly dynamic, lifelike avatars that remain visually consistent from the first second to the last—whether the video lasts one minute or one hour.
This makes LongCat Avatar an ideal foundation for next-generation AI presenters, virtual humans, digital actors, and conversational avatars.
LongCat Avatar Use Cases
Discover how LongCat Avatar transforms audio into realistic, long-duration video content across diverse applications.
Actor / Actress
Generate expressive performances with perfectly synchronized lip movements and consistent facial identity across long cinematic scenes.
A woman in a patterned headscarf and checkered top, her face contorted in emotional distress as she cries out. Soft greenery blurs in the background. Subtle shoulder movements and gentle sway of leaves.
A contemplative, intimate close-up portrait of a blonde woman. She is talking.Her expression is thoughtful and focused, with her gaze directed slightly upward and to the right, as if in reflection. Her right index finger rests gently against her lower lip, emphasizing a moment of deep consideration.
Singer
Create rhythm-aware body motion aligned with vocals, producing engaging musical performances without motion degradation.
On a concert stage illuminated by dramatic spotlights, a female singer stands at the microphone, passionately performing a song. The camera smoothly circles around the singer, capturing dynamic angles as shetightly held the microphone with both hands and moves body to the rhythm of the music. The energetic atmosphere is enhanced by the vibrant lighting and the presence of musical equipment in the background.
A woman holds a microphone with both hands and talks passionately, her voice echoing through the quiet surroundings.
Podcast & Long Interviews
Support hours-long speaking videos while maintaining consistent appearance, natural gestures, and visual clarity.
A woman with wavy dark-brown hair in a white strapless top excitedly holds up a golden skincare bottle at a table filled with luxury beauty products. Elegant white, gold, and beige setting. Subtle hand movement and excited expression.
A woman in a light robe applies skincare from a small amber dropper, surrounded by sunlit potted plants and white ceramics in a warm, cozy room. Gentle natural lighting, subtle hand movement, peaceful atmosphere.
Sales & Corporate Presentations
Produce professional AI presenters that handle silent moments naturally, avoiding awkward pauses or robotic stillness.
A professional sales presenter delivering a corporate presentation, handling silent moments naturally without awkward pauses or robotic stillness.
An AI presenter explaining business concepts with professional demeanor, maintaining natural expressions and smooth transitions throughout the presentation.
Multi-Person Conversations
Generate synchronized videos for multiple speakers with accurate turn-taking, individual identity preservation, and natural group dynamics.
A man and woman in a recording studio stand facing each other, both wearing headphones. A large professional microphone with a pop filter is positioned between them. Warm, dim light illuminates the soundproof panels on the walls, creating an intimate and collaborative atmosphere. Subtle movements include a shared glance, a slight nod, and the adjustment of a headphone.
A man in a gray suit and a woman in a beige cardigan sit on a couch, preparing for a video call visible on a tablet before them. A ring light illuminates the cozy, professional room lined with a wooden bookshelf and plants. They lean in slightly, engaged in quiet conversation, conveying a collaborative and modern work atmosphere.
Advantages of LongCat Avatar
Open-Source SOTA Realism
LongCat Avatar ranks #1 in overall anthropomorphism for both single-person and multi-person scenarios in EvalTalker evaluations, validated by 492 participants and multiple independent raters.
Designed for Long-Form Content
Unlike short-clip-focused models, LongCat Avatar is built specifically for long-form video generation, eliminating drift, jitter, and motion collapse.
More Expressive Than Traditional Avatar Models
Thanks to disentangled motion modeling, LongCat Avatar generates richer body language and facial expressions, rather than stiff, speech-only movements.
Production-Ready Architecture
Support for multiple generation modes and stable long sequences makes LongCat Avatar suitable for commercial, research, and SaaS deployments.
LongCat Avatar vs Traditional Tools
LongCat Avatar delivers more vivid performance, richer dynamics, and better long-term realism than InfiniteTalk, especially for extended videos and multi-speaker scenarios.
| Feature | LongCat Avatar | Traditional Tools |
|---|---|---|
| Long-Form Stability | Excellent | Limited |
| Identity Consistency | Stable & Flexible | Rigid |
| Motion Diversity | Natural & Dynamic | Often Static |
| Silent Segment Behavior | Natural Gestures | Frozen |
| Error Accumulation | Eliminated | Accumulates |
| Multi-Person Support | Native | Limited |
How to Use LongCat Avatar
Creating long-form audio-driven avatar videos in three simple steps.
Upload Audio & Reference
Upload your audio file (speech, music, or podcast) and optionally provide a reference image or text description. LongCat Avatar supports AT2V (Audio-Text-to-Video), ATI2V (Audio-Text-Image-to-Video), and audio-conditioned video continuation modes.
Configure Generation Settings
Select your generation mode and configure settings for long-form video generation. Choose video length, resolution (up to 720p/30fps), and specify if you need multi-person support or infinite-length sequences. The model handles long-duration content without quality degradation.
Generate Long-Form Avatar Video
Click "Generate" and LongCat Avatar creates your video with perfect lip synchronization, natural gestures, and consistent identity. The model maintains visual quality across long sequences, generating expressive motion even during silent segments. Your realistic avatar video is ready for production use.
What Users Are Saying
Real teams and creators use LongCat Avatar for production-ready, long-form avatar generation.
LongCat Avatar's long-sequence stability is game-changing. We can generate hour-long presentations without identity drift or quality collapse. The natural gestures during silent moments make our avatars feel truly alive.
Creating video versions of our 2-hour podcasts used to be impossible. LongCat Avatar maintains perfect lip sync and consistent appearance throughout the entire duration. It's like having a professional actor on demand.
Our course instructors can now create engaging video lectures from audio recordings. The model handles multi-person scenarios perfectly, making complex conversations look natural and professional.
LongCat Avatar powers our AI presenter feature. The disentangled motion modeling means our avatars don't look robotic during pauses—they have natural idle movements that keep viewers engaged.
The identity preservation without copy-paste artifacts is remarkable. We can generate cinematic performances with consistent character appearance across infinite-length sequences. It's revolutionizing our workflow.
Our sales team uses LongCat Avatar to create personalized video presentations. The model handles silent moments naturally, avoiding awkward pauses that would make our AI presenters look unnatural.
FAQs about LongCat Avatar
Everything you need to know about LongCat Avatar.
LongCat Avatar is an audio-driven avatar model designed for super-realistic, long-form video generation with stable identity and natural motion.
It supports AT2V, ATI2V, and audio-conditioned video continuation.
LongCat Avatar offers better long-sequence stability, more natural motion, and avoids rigid copy-paste artifacts.
Yes, it is specifically optimized for long-duration and infinite-length video generation.
Yes, multi-person scenarios are natively supported.
Through Cross-Chunk Latent Stitching, which eliminates redundant VAE decode-encode cycles.
Yes, natural gestures and idle movements are generated even without speech.
Yes, it is an open-source model with state-of-the-art evaluation results.
Media, entertainment, education, marketing, sales, and virtual human platforms.
Absolutely. Its stability and flexibility make it ideal for commercial SaaS deployment.