# LongCat Avatar > LongCat Avatar is an AI-powered platform that generates realistic lip-synchronized avatar videos from a single photo and audio input. Built on the open-source LongCat Video Avatar 1.5 model with Whisper-Large-v3 audio encoding, it supports accurate lip-sync, singing, anime characters, multi-person dual-audio scenes, and production-grade temporal consistency — all in the browser with no local GPU required. Website: https://www.longcatavatarai.com Contact: support@longcatavatarai.com --- ## Homepage — https://www.longcatavatarai.com ### What is LongCat Avatar? LongCat Avatar is an expressive avatar model built upon LongCat-Video, designed for audio-driven character animation. It automatically converts audio + text + images into super-realistic, lip-synchronized long videos with natural motion and consistent identity. ### Key Features **Perfect Lip-Synchronized Talking Videos** LongCat Avatar aligns mouth movement precisely with audio to produce perfect lip-synchronized talking videos that look natural and engaging for any use case. **Natural Full-Body Motion and Expression** The model generates smooth full-body motion and facial expressions beyond lips, giving avatar videos a realistic, natural dynamic that enhances audience engagement. **Multi-Input Audio, Text, and Image Support** LongCat Avatar supports generating videos from multiple input types, including audio + text and photo + audio workflows, for flexible and diverse video creation. **HD Output and Publish-Ready Quality** Generate high-definition avatar videos with quality up to 720p, delivering clear visuals and crisp motion suitable for publishing and sharing across platforms. **Consistent Identity and Long Video Stability** The system maintains consistent character identity across long videos and avoids drift, ensuring your avatar looks stable and recognizable throughout every output. **Fast, High-Performance Generation** LongCat Avatar delivers efficient video generation with optimized performance, enabling creators to produce dynamic avatar videos quickly without losing quality. ### How to Use LongCat Avatar Step 1 — Upload Your Photo Start by uploading a clear photo of the subject. A high-quality portrait helps the avatar model preserve identity and enables smoother, more natural motion in the talking video. Step 2 — Upload Your Audio Provide your audio file — speech, singing, or any audio type. The AI will align lip movements perfectly with the sound for realistic lip-synchronized talking video results. Step 3 — Generate Video After uploading photo and audio, generate your video. In minutes you will get a natural, fluid talking video with coordinated motion and a consistent character identity. ### Why Choose LongCat Avatar - 13.6B Parameters: With 13.6 billion parameters, LongCat Avatar delivers exceptional quality and stunning details in every video. - Full-Body Animation: Beyond lip-syncing, LongCat Avatar brings avatars to life with natural head, eye, and shoulder movements. - Multi-Modal Engine: The engine seamlessly combines text, audio, and images to generate dynamic avatar videos. - 720p HD Quality: Create high-quality, crystal-clear 720p HD videos with realistic avatars, perfect for any project. - 2-Minute Long Video: Generate stable, identity-consistent long videos (up to 2 minutes) with smooth, lifelike motion. - Consistent Identity: LongCat Avatar ensures seamless character consistency across videos, eliminating identity drift and breakdowns. - Seamless Audio Sync: Flawless audio and video synchronization in any scenario, with natural motion and lip sync. - Flexible Pricing: Credit-based pricing, allowing scalable production for every budget. Pay only for what you use. No monthly subscriptions required. ### Homepage FAQ Q: What is LongCat Avatar and how does it work? A: LongCat Avatar is an AI-powered tool that generates realistic, lip-synced avatar videos by combining audio, text, and images, producing high-quality, natural motion and facial expressions. Q: What makes LongCat Avatar different from other avatar video tools? A: LongCat Avatar uses 13.6B parameters to produce long-form, stable videos with lifelike motion, consistent identity, and seamless audio synchronization, setting it apart from other tools that struggle with short clips or identity drift. Q: How does LongCat Avatar maintain character consistency in long videos? A: LongCat Avatar ensures that your avatar's identity and motion remain stable and natural even across videos up to 2 minutes long, eliminating visual breakdowns. Q: What video quality can I expect from LongCat Avatar? A: LongCat Avatar generates videos in 720p HD quality, delivering clear and professional visuals suitable for a wide range of applications including marketing, social media, and educational content. Q: What types of input does LongCat Avatar support? A: LongCat Avatar supports multiple input types, including text, audio, and images, allowing you to create dynamic avatar videos that fit any creative need with its multi-modal generation engine. Q: How long can the videos generated by LongCat Avatar be? A: LongCat Avatar can generate videos up to 2 minutes long, with stable identity and smooth, natural motion, making it ideal for both short clips and longer-form content. Q: Is LongCat Avatar suitable for creators and marketers? A: Yes, LongCat Avatar is perfect for content creators and marketers who need realistic, lip-synced avatars for ads, social media content, product videos, and more, enhancing viewer engagement. Q: What is the pricing model for LongCat Avatar? A: LongCat Avatar offers flexible, credit-based pricing, allowing users to pay only for the video outputs they need, making it a cost-effective solution for both individual creators and businesses. Q: Can LongCat Avatar be used for educational content creation? A: Yes, LongCat Avatar is an excellent tool for generating educational videos, e-learning courses, and training materials, providing engaging, lifelike avatars to enhance learning experiences. --- ## LongCat Video Avatar 1.5 — https://www.longcatavatarai.com/longcat-video-avatar-1-5 LongCat Video Avatar 1.5 turns audio + image into lifelike digital human videos. Supports lip-sync, singing, and animation. No GPU required to start. ### What Is LongCat Video Avatar 1.5? LongCat Video Avatar 1.5 is an audio-driven avatar video model built on the LongCat-Video foundation architecture developed by Meituan. Give it a voice track, a reference image, or a text prompt, and it generates a talking character video with synchronized lip movement, natural motion, and consistent identity across frames. Suitable for AI presenters, digital humans, anime avatars, and multilingual talking videos. ### Generation Modes AT2V — Audio-Text-to-Video: Generate an avatar video from audio + text prompt alone. ATI2V — Audio-Text-Image-to-Video: Add a reference photo for a personalized avatar video. Video Continuation — Sequence Extension: Extend an existing clip while preserving identity and motion. Supported output: 480P and 720P. Languages: English and Chinese (best lip-sync alignment). ### What's New in Version 1.5 vs 1.0 The original LongCat Video Avatar launched in December 2024. Version 1.5 addresses the main limitations that showed up in real-world use. | Feature | v1.0 | v1.5 | |----------------------|-----------------------|-----------------------------------------------| | Audio encoder | Wav2Vec2 | Whisper-Large-v3 | | Lip-sync quality | Functional | Significantly smoother, more natural | | Inference steps | Full diffusion | 8 steps via DMD2 distillation | | VRAM options | Standard | INT8 quantization available | | Stylized domains | Limited | Anime, animals, complex scenes | | Multi-person support | Single stream | Single + multi-stream audio | | Long video stability | Variable | Production-grade temporal consistency | The audio encoder swap is the biggest functional change. Whisper-Large-v3 was trained on far more multilingual speech data than Wav2Vec2, which is why lip dynamics are noticeably more accurate — especially on longer clips where the older encoder would drift. The 8-step distillation matters for deployment cost. Fewer inference steps = lower GPU time per video = more practical for batch production. ### Key Features of LongCat Video Avatar 1.5 **Whisper-Large-v3 Audio Encoder** Uses Whisper Large-v3 to analyze speech timing, rhythm, and phoneme transitions with higher accuracy. The result: smoother lip-sync, more natural mouth movement, and better speaking realism across longer videos. **Production-Grade Stability** Generate long-form avatar videos with stable identity, accurate lip-sync, and smooth full-body motion. The model keeps characters consistent frame to frame — even during hand movement, object interaction, or extended scenes. **Stylized Domain Support** Supports anime characters, illustrated portraits, stylized 3D renders, animal avatars, and multi-person scenes with dual-audio input modes. **8-Step Fast Inference with INT8 Quantization** Reduce generation time and GPU cost with DMD2-based 8-step inference. Enable --use_int8 mode to lower VRAM usage and run the model more efficiently in production environments. **Multi-GPU Context Parallelism** Scale avatar video generation across multiple GPUs for batch production and longer sequences, improving rendering stability and throughput for studio workflows. ### Stability and Consistency Showcases Long-Form Talking: Accurate lip-sync and identity consistency across extended speaking shots, hand gestures, and object interactions — no frame drift, no identity degradation. Singing and Performance: Dynamic motion, musical expression, and stable full-body or upper-body performance — from soft ballads to energetic stage performances. Animation: Expressive motion and stable audio-driven performance across anime characters, illustrated portraits, and stylized 3D avatars. Multi-Person Interaction: Multi-speaker and group interaction cases with stable identities and natural turn-taking behavior — powered by dual-audio Merge and Concatenation modes. ### Commercial Model Comparison LongCat Video Avatar 1.5 is compared with HeyGen, Kling Avatar 2.0, and OmniHuman-1.5 under the same or similar inputs, focusing on stability, consistency, and natural lip motion. LongCat Video Avatar 1.5 is the only open-source option — MIT licensed, self-hostable, with no per-video fee. HeyGen and Kling are closed commercial APIs with limited deployment flexibility and no customization access. ### Use Case Scenarios News Broadcasting and Education: Talking-head videos for presenters, anchors, and educational content. The model handles extended monologues (2+ minutes) with stable lip motion. Singing and Performance: Audio-driven singing with synchronized mouth shapes. Full-body or upper-body motion responds to musical rhythm. Animation and Stylized Characters: Anime faces, 3D characters, and illustrated portraits. Generalizes to non-photorealistic domains like hand-drawn and cel-shading styles. Multi-Person Conversations: Two speakers in one frame driven by separate audio tracks, supporting both merged and alternating turn-taking modes. E-Commerce Marketing Videos: Product demos and AI spokespeople. Practical for batch production with 720P output and fast 8-step inference. Animal and Non-Human Characters: Animal faces and creature avatars with audio-driven mouth motion. Ideal for game assets and character storytelling. ### LongCat Video Avatar 1.5 FAQ Q: What input formats does LongCat Video Avatar 1.5 support? A: Accepts audio, text prompts, reference images, and existing video clips. Three modes: Audio-Text-to-Video (AT2V), Audio-Text-Image-to-Video (ATI2V), or Video Continuation. Q: What video resolutions does it support? A: The current release supports 480P and 720P output. Native 1080P is not available in version 1.5. Q: Does it work with anime and stylized characters? A: Yes. Beyond photorealistic humans, it handles anime characters, illustrated portraits, stylized 3D avatars, and animal characters. Q: Can I use the generated videos commercially? A: Yes. The model ships under the MIT license, which permits commercial use. You are responsible for ensuring you hold the rights to any images, audio, and likenesses used as inputs. Q: How is it different from HeyGen or Kling Avatar 2.0? A: LongCat Video Avatar 1.5 is the only open-source option in this group — MIT licensed, self-hostable, and with no per-video fee. HeyGen and Kling are closed commercial APIs with limited deployment flexibility and no customization access. Q: What makes a good reference image? A: Use a clear, front-facing portrait with even lighting and no face occlusion. Detailed text prompts help too — include appearance, action, and scene context. More detail consistently produces better output. Q: How accurate is the lip-sync? A: Whisper-Large-v3 delivers tighter phoneme-to-viseme mapping than Wav2Vec2. The official evaluation confirmed Audio-Visual Harmony improvements across 508 image-audio test pairs. Q: Do I need to install software or have a local GPU? A: No installation or local GPU needed to use the online demo — just sign up and start generating. Local deployment requires a CUDA-compatible GPU (24GB VRAM minimum), Python 3.10, and a conda environment. Q: Is this platform free? A: New users get a free credit on sign-up to generate one video. Additional credits are available for purchase. Q: Does it support multiple languages? A: The Whisper-Large-v3 encoder performs best on English and Chinese audio for lip-sync alignment and speech feature extraction. Other languages may work but are not officially supported. Q: Can it generate video in real time? A: No. This is an offline generation model. Even with 8-step inference, each video requires meaningful GPU compute time. It is not designed for live-streaming or real-time avatar applications. Q: Does it support multi-person scenes? A: Yes. Version 1.5 adds dual-audio support for multi-person avatar scenes via Merge and Concatenation modes. Q: How do I generate a two-person video? A: Switch to Multi Avatar mode and upload two separate audio tracks. Merge mode runs both tracks simultaneously and requires equal-length clips. Concatenation mode sequences them one after the other. Q: How are credits calculated? A: Credit usage depends on video length, resolution, and generation mode. Higher resolution and longer duration consume more credits per generation. --- ## Pricing — https://www.longcatavatarai.com/pricing All plans are one-time credit purchases — credits never expire and there are no monthly subscriptions. Starter — $9.90 100 AI generation credits. 720p export, no watermark, commercial license, standard queue. Basic — $29.90 330 AI generation credits. 1080p export, no watermark, commercial license, priority queue. Plus — $49.90 600 AI generation credits. 1080p export, no watermark, commercial license, faster priority queue, up to 5 concurrent jobs. Professional — $99.90 1250 AI generation credits. 1080p export, no watermark, commercial license, fastest queue, up to 10 concurrent jobs, bulk processing, API access. New users receive a free credit on sign-up to generate one video at no cost. --- ## Site Information This website is an independent third-party platform and has no affiliation with Meituan or LongCat-Video. It provides an online interface to the open-source LongCat Video Avatar model. Sitemap: https://www.longcatavatarai.com/sitemap.xml