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Models / ByteDance Seed

ByteDance SeedAvailable on TokenCenter

Seed 2.1 Turbo

bytedance-seed/seed-2-1-turbo

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows.

Key facts

Input price
$0.50 / 1M tokens
Output price
$2.50 / 1M tokens
Context window
262K tokens
Max output
236K tokens
Accepts
Text, Images, Video
Returns
Text

Example: 1,000 requests with 1,000 input and 500 output tokens each would cost about $1.75 (1M input tokens × $0.50 + 0.5M output tokens × $2.50). Estimate your own usage.

Prices are the provider’s own per-token rates with zero markup, from our price list as of Oct 18, 2026. If a call has extra provider charges (images, audio, web search, cached prompts), you pay the reported cost.

Get API keyTry in chatCompare

Call it from your code

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

Works with any OpenAI-compatible SDK: set the base URL to https://api.tokenctr.com/v1. Quickstart

Supported request parameters

frequency_penaltyinclude_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_p