Seed-2.1-Pro
bytedance/seed-2.1-proSeed 2.1 Pro is the larger of the two models in ByteDance Seed's Seed2.1 family, offered as Doubao-Seed-2.1-Pro through Doubao and Volcano Engine. ByteDance built Seed2.1 for real-world productivity: multi-step general agent work such as planning, document processing and tool use, end-to-end coding from requirement analysis to validation, and computer-use tasks. It also brings strong image, document and long-video understanding, and Seed 2.1 Turbo is the smaller sibling.
- Input price
- $0.89USD / 1M tokens
- Output price
- $4.45USD / 1M tokens
- Cache read
- $0.18USD / 1M tokens
- Context window
- 1M
- Max output
- 262.1K
Specifications
- Input
- Text, image
- Output
- Text
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OpenAI-compatible endpoint with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/chat/completions" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "bytedance/seed-2.1-pro",
"messages": [
{
"role": "user",
"content": "Hello"
}
],
"max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Questions
FAQ
How do I call ByteDance Seed-2.1-Pro through SandBase?
Create a SandBase API key, then send requests with the model ID "bytedance/seed-2.1-pro" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.
How much does ByteDance Seed-2.1-Pro cost?
$0.89 per 1M input tokens and $4.45 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.
What is the context window of ByteDance Seed-2.1-Pro?
1M tokens of context, with up to 262.1K output tokens per response.
Which features does ByteDance Seed-2.1-Pro support?
ByteDance Seed-2.1-Pro supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.
Do I need a separate ByteDance account?
No. One SandBase API key and balance gives you access to ByteDance Seed-2.1-Pro and the other models in the catalog; you do not need to sign up with ByteDance separately.