Seed 1.8 Thinking
Seed 1.8 Thinking is ByteDance's variant of the Seed 1.8 model series with an explicit chain-of-thought reasoning mode enabled. ByteDance positions the Seed family as a high-capability foundation for both conversational and analytical tasks; the Thinking variant adds structured internal deliberation before generating a final response, improving performance on problems that benefit from step-by-step reasoning.
The model is oriented toward complex question answering, multi-step arithmetic, logical inference, and coding problems that require careful planning. It competes in the segment of frontier reasoning models from Asian AI labs, offering an alternative reasoning path to DeepSeek-R1 and QwQ.
Key Features
Chain-of-thought reasoning mode with explicit internal deliberation
Improved accuracy on multi-step arithmetic and logical problems
Competitive performance on complex coding and planning tasks
Built on the Seed 1.8 foundation with strong instruction following
Reasoning trace visible to developers for interpretability
Ideal Use Cases
Complex mathematical and scientific problem solving
Multi-step reasoning tasks in research and analysis workflows
Code generation requiring careful algorithm planning
Agentic tasks that benefit from deliberate step-by-step thinking
Example Prompts for Seed 1.8 Thinking
Technical Specifications
| Provider | ByteDance |
| Category | Reasoning |
| Modality | Text -> Text (reasoning) |
Frequently Asked Questions
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