LongCat Avatar is an AI-powered avatar model that generates realistic, lip-synced talking videos from a photo and audio input, using a 13.6B-parameter engine for up to 720p output and stable 2-minute clips.
What is LongCat Avatar?
LongCat Avatar (built upon the LongCat Video Avatar 1.5 — AI Lip-Sync & Digital Human Generator model) is an audio-driven character animation tool. It takes a source portrait image, an audio file (speech, singing, or multi-track), and optional text or style prompts, then outputs a video with synchronized lip movement, natural full-body motion, and consistent identity. The system runs as a web-based service and is developed by LongCat.
Key Features
- Perfect Lip‑Sync — Aligns mouth movement precisely with the input audio using Whisper-Large-v3, producing natural talking videos for any language or audio type.
- Full‑Body Motion & Expressions — Generates smooth head, eye, and shoulder movements beyond just lips, making avatars appear lifelike and engaging.
- Multi‑Input Support — Accepts combinations of audio, text, and image inputs (AT2V and ATI2V workflows) for flexible content creation.
- 720p HD Quality — Delivers crisp, publish-ready video output at up to 720p resolution with no watermark on paid plans.
- Stable Long‑Form Generation — Maintains character identity and avoids visual drift across videos up to 2 minutes long, suitable for extended dialogue or presentations.
- Fast Generation — Optimized inference enables quick video production without sacrificing quality, with priority queue options on higher-tier plans.
- 13.6B Parameter Model — The underlying neural network uses 13.6 billion parameters to produce high detail and natural dynamics.
- Multi‑Track Audio — Supports audio files with multiple tracks, enabling complex soundtracks or layered voiceovers.
Who is it for?
- Content Creators & Influencers — produce talking head videos, narrative clips, and social media posts with realistic avatars from photo and audio.
- Media, Entertainment & Filmmakers — generate expressive character performances for cinematic or episodic content without traditional shooting.
- Brands & Marketing Teams — create product explainers, virtual presenters, and campaign videos with consistent branding and high production quality.
- Educators & Training Platforms — develop engaging lesson videos and e-learning modules that hold learner attention with natural motion.
- Corporate Communications — use for internal briefings, executive summaries, and remote training where identity consistency is critical.
- Podcast & Interview Producers — transform audio interviews into visual avatar videos with fluid motion, ideal for long-form talk formats.
What can you do with LongCat Avatar?
- Social Media Content: Upload a portrait and a voiceover to instantly produce a lip-synced avatar video for platforms like Instagram, TikTok, or YouTube.
- Product Demos: Combine a product image with an audio explanation to create an animated presenter video without filming.
- Educational Lectures: Turn a lesson script and a teacher photo into a talking‑head video with natural gestures for online courses.
- Podcast Visualization: Feed a podcast audio track and a host photo to generate a visually engaging video version of the episode.
How does LongCat Avatar work?
The workflow has three steps: (1) Upload a clear portrait photo (JPG or PNG); (2) Upload an audio file (click to upload); (3) Click "Generate Video". The system processes the inputs through its 13.6B‑parameter model, aligning lip movement to the audio while generating natural head and body motion. You can also select output quality (Standard 480P or High Def 720P) and provide an optional style prompt before generation.
