Model card
hy4-preview is Tencent's 49B-activation mixture-of-experts model built for coding agents and multi-step tool workflows. It handles 1M-token contexts, supports parallel tool calls, and excels at repository-scale code understanding. Compared to other 49B-class models, it balances strong coding performance with efficient inference via MoE routing. The API integrates easily into existing agent frameworks, supporting standard JSON-based function calling and streaming. It's well-suited for automated refactoring, codebase Q&A, and long-running dev tasks.
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