sync React 1 - AI Model Guide

sync React 1 is an AI video-to-video model on Replicate that performs realistic lipsync with full facial reanimation. It lets creators adjust a character's emotional delivery and sync new audio to existing footage without reshoots, regenerating scenes, or returning to set. It supports filmed and AI-generated video alike.

sync React 1 supports six discrete emotion states: happy, sad, angry, disgusted, surprised, and neutral. Creators can guide a character's emotional read by selecting one of these states, enabling performance variation and emotional intensity exploration from a single source video take.

Unlike basic lipsync tools that only move the mouth, sync React 1 reanimates the entire face—including expression, identity, and acting style—while modifying emotional delivery. It also synthesizes natural head movements in head mode, producing fully animated talking-head outputs synchronized with speech and emotion.

sync React 1 works with both real camera footage and AI-generated video. It is compatible with outputs from major AI video tools including Runway, Veo, Sora, Pika, and Kling, making it versatile for hybrid production pipelines that combine filmed and synthetic content.

sync React 1 accepts .wav audio files as input. It precisely synchronizes lip movement, facial expression, and head behavior to the new audio track, enabling accurate dubbing, re-voicing, and localization workflows that produce native-feeling results rather than obvious post-production overlays.

sync React 1 is built for filmmakers, content creators, dubbing studios, and AI video artists who need precise, believable control over facial performance after capture. It is especially useful for directors and editors who want to explore emotional variations or localize content without returning to set or regenerating scenes.

Yes. sync React 1 is designed to produce native-feeling dubbed content by reanimating the full face—not just lip movement—to match new audio. This makes localized or re-voiced content feel authentic, addressing a common problem where dubbed video looks unnatural due to mismatched facial behavior.

sync React 1 is available on Replicate under the model ID sync/react-1. It was created by sync and falls under the video-to-video category. Creators can access it through Replicate's API or platform interface to integrate AI facial reanimation into their production or post-production workflows.