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Seed 2.1 Turbo is BytePlus ModelArk’s next-generation model for coding and agent workflows, with stronger engineering-grade code delivery, autonomous planning, and dynamic self-repair. It supports text generation and multimodal understanding through both Chat Completions and Responses APIs, including video understanding, function calling, and structured output. Use it for long-running production tasks that need deep reasoning, tool use, and visual context within a 256K-token context window.

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Model ID

Pass this exact public ID in the top-level model field. Do not substitute an upstream provider alias.

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Supported modes

  • responses_api
  • visual_understanding
  • text_generation
  • chat_completions

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Inputs

  • Text
  • Image
  • Video

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Outputs

  • Text

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Capabilities

  • Visual understanding
  • Text generation

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Additional capabilities

  • Online inference
  • Context caching
  • Deep reasoning
  • Function calling
  • Structured output See Function calling and Gemini tools for tool declarations, result submission, and provider-specific capabilities.

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Technical details

Availability and final customer prices can change. Check the Dashboard model catalog before production use.
See the API reference overview for authentication, request conventions, and response schemas.