Doubao Seed 1.6 Thinking
Seed1.6 Thinking is ByteDance’s separately named extended-reasoning tier for mathematical, coding, and visual problems. It is post-trained on the Seed1.6 mixture-of-experts foundation with repeated rejection fine-tuning and reinforcement learning, integrating image understanding into long reasoning traces. It emphasizes sustained deliberation rather than selecting thinking automatically for each prompt. Volcano Engine offers the model under Doubao API identifiers, with a 256K context. The official June 2025 technical introduction documents a public try link; the release month is retained because the first public day is not independently verified.
2025-06
230B total, 23B active
Multimodal Mixture-of-Experts Transformer
Proprietary
Specifications
- Parameters
- 230B total, 23B active
- Architecture
- Multimodal Mixture-of-Experts Transformer
- License
- Proprietary
- Context Window
- 256,000 tokens
- Type
- multimodal
- Modalities
- textimage
Benchmark Scores
Advanced Specifications
- Model Family
- Seed
- API Access
- Available
- Chat Interface
- Not Available
- Variants
- doubao-seed-1-6-thinking-250615
Capabilities & Limitations
- Capabilities
- extended reasoningmathematicscodingvision
- Known Limitations
- Public weights are unavailableLong reasoning traces increase response cost and latencyReported parallel-decoding results depend on inference settings
- Notable Use Cases
- visual mathematical problem solvingtechnical reasoningcomplex code assistance