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ByteDance Seed · Language model

Seed 2.1 Turbo

bytedance-seed/seed-2-1-turbo
  • Language
Released Aug 12, 2026

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows. It is suited for end-to-end software delivery, multi-step task execution, and understanding visual and...

Specifications

Context window
262,144 tokens
Max output
235,929 tokens
Input
text, image, video
Output
text
Reasoning
supported
Tokenizer
Other

Supported parameters

Accepted by the model and forwarded as-is by the gateway.

  • frequency_penalty
  • max_tokens
  • reasoning
  • response_format
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_p

Use it

POST /api/v1/chat/completions · MCP chat · full reference

curl https://omnirail.org/api/v1/chat/completions \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"bytedance-seed/seed-2-1-turbo","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'