Video model · Jul 31, 2026
New in Seedance 2.5 are 30-second audio-video clips, multiple extension rounds, and smoother transitions between scenes. A single run can use up to 30 images, 10 video clips, and 10 audio clips as references.
Image model · July 2026
Seedream 5.0 Pro is documented as its own BytePlus ModelArk endpoint with 1K, 1.5K, and 2K tiers. Its Pro ID runs separately from Seedream 4.0, and a higher version number does not automatically make prompt, reference, or resolution options compatible.
Language model · Jun 23, 2026
Seed 2.1 Turbo puts ByteDance’s text, image, and video inputs into an accelerated API serving form with 256K tokens of context. Turbo therefore names the serving form of the Seed 2.1 line, not a released local checkpoint.
Video model · March 2026
What is distinctive about Seedance 2.0 is its unified audio-video architecture for text, images, audio, and video. References can guide performance, lighting, shadows, and camera movement; the 720p profile generates up to 15 seconds.
Language model · Feb 14, 2026
Seed 2.0 Code is ByteDance’s specialized product role for programming work. The API model is listed with 256K tokens of context, multimodal understanding, and tool use in TRAE and through the Volcano interface. Its parameter count and weights are not public, so the name does not identify a local checkpoint.
Language model · Feb 14, 2026 · Deprecated
Seed 2.0 Lite is ByteDance’s cost-oriented service tier for frequent multimodal calls. The proprietary API model handles text, images, and video with 256K tokens of context. Because ByteDance publishes neither a parameter count nor weights, Lite describes a serving tier rather than a local model size.
Language model · Feb 14, 2026 · Deprecated
Seed 2.0 Mini is the smallest listed service tier in the Seed 2.0 family. ByteDance publishes no parameter count. Text, image, and video inputs use a 256K-token API context; no local weight package is provided.
Language model · Feb 14, 2026
Seed 2.0 Pro is ByteDance’s large proprietary tier for visual puzzles, documents, video, and other unstructured information. It handles text, images, and video with 256K tokens of context. The parameter count is unpublished, with access provided through ByteDance and BytePlus APIs.
Language model · Dec 18, 2025 · Deprecated
Seed 1.8 combines three reasoning modes with image understanding and a 256K-token context. ByteDance presents the proprietary service as a generalized agent model for search, coding, and GUI tasks. ByteDance publishes no parameter count, so the accessible model form is defined by its product role and tool surface.
Image model · September 2025
Seedream 4.0 combines text-to-image generation and editing in one model. ByteDance documents text, image, and combined inputs, single- and multi-image editing, up to a dozen references, and 4K output. Identity, structure, and style can therefore change together in one scene.
Language model · Jun 15, 2025 · Deprecated
Seed 1.6 is ByteDance’s multimodal deep-thinking model with 230B total parameters, 23B active parameters, and 256K tokens of context. Its technical description highlights adaptive thinking time, AdaCoT, and GUI-agent use. The model can therefore vary the amount of internal planning between a direct answer and a more involved task.
Language model · Jun 15, 2025 · Deprecated
Seed 1.6 Flash is ByteDance’s compact API variant of its multimodal deep-thinking model. It accepts text, images, and video, supports up to 256K tokens of context, and can answer directly with thinking disabled. The parameter count is unpublished, and no weights are provided.