Is Seedance Open Source?

Seedance video models, including versions 2.5, 2.0, 2.0 Fast, 2.0 Mini, and 1.5 Pro, appear to be neither open-weight nor open-source based on checks of ByteDance’s official pages, its GitHub and Hugging Face organizations, and OpenRouter’s catalog. No public checkpoints or model licenses were found, while third-party projects using the Seedance name are generally API clients or hosted-service wrappers rather than locally runnable model releases. This prevents offline deployment, self-hosting, air-gapped use, and fine-tuning on private footage, all of which require downloadable weights. OpenRouter offers the five hosted Seedance models through an asynchronous video API, supporting prompts and, depending on the model, image, audio, video, first- and last-frame inputs, varied durations, resolutions up to 4K, and audio generation. Users submit a billable generation job, poll for completion or use webhooks, and download the resulting video with authorization, while avoiding automatic retries on submission to prevent duplicate charges. Video generation is not compatible with Zero Data Retention because providers must temporarily retain completed output files.

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