The free, open-source talking-avatar model. One photo + one audio clip = a lip-synced talking video.
Upload a single portrait and an audio clip. LongCat gives you back a proper talking avatar, with mouth movement that matches the audio frame for frame.
Version 1.5 upgraded the audio encoder to Whisper-Large, which reads phonemes and rhythm more finely — so mouth shapes land on the right sounds.
Feed it a song and the avatar performs it — rhythm-aware head and body motion, not a static face with a moving mouth.
Gestures, posture shifts and hand movement stay coordinated with the audio, so the body reads as a person actually speaking.
Most avatar tools go stiff the second the audio stops. LongCat separates speech from motion, so blinking, breathing and small posture shifts carry on through pauses.
Two or more speakers in the same shot, each holding their own identity, with natural speaker/listener turn-taking.