Doubao Seed Code

Doubao Seed Code is a specialized large language model developed by ByteDance's Seed research team and delivered through the Volcano Engine platform. Optimized for agentic programming tasks, the model follows a "plan first, then develop" methodology, where the AI assistant generates a structured design, executes code changes incrementally, and self-repairs through internal feedback loops. This agent-first architecture is designed to handle complex software engineering workflows rather than providing simple one-shot code completions.

The model features a 256k token context window, enabling it to analyze and reason across entire codebases or large documentation sets. It supports more than 200 programming languages, including popular ones like Python, Java, JavaScript, C++, and Go. In technical evaluations, Doubao Seed Code achieved high rankings on the SWE-Bench Verified benchmark, reflecting its ability to resolve real-world software issues autonomously.

Capabilities and Integration

Doubao Seed Code emphasizes cost efficiency and low-latency response times, often utilized within ByteDance's internal development tools and external coding applications like Trae. It is designed to be natively compatible with common agentic APIs, facilitating straightforward integration for developers. In February 2026, the series was expanded with the release of Doubao-Seed-2.0-Code, which introduced further improvements in long-chain reasoning and complex problem-solving capabilities.