Seed 2.1 Pro
Volcengine Ark · Flagship ByteDance Seed 2.1 model for complex multimodal reasoning, coding, and agents
Key facts
- Provider
- Volcengine Ark
- Context window
- 256K tokens
- Max output
- 256K tokens
- Input price
- $0.8906 / M tok
- Output price
- $4.45301 / M tok
- Knowledge cutoff
- —
- Released
- Jun 23, 2026
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Reasoning options
- effort none · minimal · low · medium · high · xhigh · max
Pricing
USD per million tokens, list API rates.
- Input
- $0.8906
- Output
- $4.45301
- Cache read
- $0.17812
- Cache write
- —
Modalities
- Input
- Text, Image, Video
- Output
- Text