Seed 2.1 Pro
Flagship ByteDance Seed 2.1 model for complex multimodal reasoning, coding, and agents
Model facts
- Context window
- 256K tokens
- Maximum output
- 256K tokens
- Cheapest paid input
- $0.707 per 1M tokens
- Cheapest paid output
- $3.54 per 1M tokens
- Open weights
- no
- Providers
- 2
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, video.
Observed price history
- 2026-08-24: $0.707 input / $3.54 output per 1M tokens
API providers
- Ofox — model id volcengine/doubao-seed-2.1-pro; $0.707 input / $3.54 output per 1M tokens; provider documentation
- Volcengine Ark — model id doubao-seed-2-1-pro-260628; $0.891 input / $4.45 output per 1M tokens; provider documentation