bytedance/seedance-v1-5 models

seedance-v1.5 by ByteDance — AI Model Family

Seedance v1.5, developed by ByteDance, represents a breakthrough in AI-driven video generation, enabling the creation of high-fidelity videos with synchronized native audio directly from text or images. This model family solves key challenges in video production by eliminating audio drift through simultaneous audio-video generation, delivering professional-grade results without post-production dubbing. It includes two core models: Seedance V1.5 | Pro | Image to Video for animating static images into dynamic clips, and Seedance V1.5 | Pro | Text to Video for generating videos from descriptive prompts, both supporting cinematic quality outputs.

Powered by a Dual-Branch Diffusion Transformer (DB-DiT) architecture, Seedance v1.5 produces videos up to 1080p resolution in seconds, with support for multiple aspect ratios like 16:9, 9:16, and 1:1. Released in December 2025, it stands out for its one-pass generation of audio and video, making it ideal for creators needing quick, realistic motion transfer and dialogue-heavy content.

seedance-v1.5 Capabilities and Use Cases

The Seedance v1.5 family excels in versatile video creation, with its Pro models tailored for Image to Video and Text to Video workflows. The Image to Video model animates static images with smooth, consistent motion transfer, preserving subject details while adding lifelike movements and native audio. Meanwhile, the Text to Video model interprets natural language prompts to generate complete scenes from scratch, incorporating synchronized speech, sound effects, and environmental audio.

Concrete use cases include social media content, advertising, and short-form dramas. For Image to Video, product marketers can transform a static photo of a dancer into a promotional clip: "Animate this image of a woman in a red dress performing a graceful ballet spin, with smooth camera pan from left to right and soft orchestral music syncing to her movements." This yields a 5-10 second 1080p video with precise lip-sync if dialogue is added.

For Text to Video, filmmakers can create narrative scenes: "A chef in a bustling kitchen flips pancakes with a dramatic zoom-in on sizzling butter, narrating in Spanish with perfect lip-sync: 'El secreto está en el fuego medio.'" The output features multilingual support, dialect-specific synchronization, and cinematic controls like pans, tilts, zooms, dolly zooms, and tracking shots.

These models integrate seamlessly in pipelines—start with Image to Video for motion transfer, then refine with Text to Video for added narrative elements or extensions using first-frame or first-last-frame inputs. Technical specs include 720p to 1080p resolutions, durations up to 10-25 seconds per clip, multiple input modes (text, image, first/last frame), and up to 10x faster inference, generating a 5-second 1080p video in about 41 seconds.

What Makes seedance-v1.5 Stand Out

Seedance v1.5 distinguishes itself through native audio-video joint generation, where audio and video are created in a single pass via DB-DiT architecture, ensuring millisecond-precision alignment without sequential processing errors. This native synchronization supports multilingual lip-sync across languages and dialects, with emotionally aligned phoneme-to-viseme matching for natural speech, sound effects, and ambient audio—critical for global content creators.

Advanced cinematic camera control enables professional movements like Hitchcock dolly zooms, orbital tracking, and continuous long takes with coherent color grading, all from simple prompts. Motion consistency is superior, with smooth dance moves, physical realism, and high fidelity in complex interactions, outperforming prior models in speed and quality. Generation is dramatically faster, up to 10x compared to earlier versions, supporting rapid iteration for high-volume production.

This family is ideal for content creators, advertisers, filmmakers, and social media producers handling dialogue-heavy or motion-intensive projects. Its strengths in quality, control, and efficiency make it perfect for professional applications like short dramas, product demos, and localized ads, where precision lip-sync and cinematic polish elevate output.

Access seedance-v1.5 Models via each::labs API

each::labs is the premier platform for harnessing the full power of the Seedance v1.5 family, providing seamless API access to both Pro models—Image to Video and Text to Video—under one unified endpoint. Developers and creators benefit from the intuitive Playground for instant testing with sample prompts, alongside robust SDKs for Python, JavaScript, and more, enabling easy integration into apps, workflows, or custom pipelines.

Experience superior motion transfer, native audio sync, and cinematic controls without infrastructure hassles. Sign up to explore the full seedance-v1.5 model family on each::labs and elevate your video generation today.