想测AI写代码的真本事？别只看Python了。Multi-LCB覆盖12种语言，一测就知道模型是不是只会Python，结果可能让你意外。
LiveCodeBench (LCB) 是广泛采用的代码生成基准，但仅限Python。新基准Multi-LCB将LCB任务转化为12种编程语言，包括Python、C++、Java等，保持原始污染控制和评估协议。研究者在Multi-LCB上评估了24个LLM，发现模型存在Python过拟合、语言特定污染和跨语言性能差异。Multi-LCB为多语言代码评估提供了严格的新基准，直接暴露了当前LLM在Python之外的短板。
Multi-LCB: Extending LiveCodeBench to Multiple Programming Languages
LiveCodeBench (LCB) has recently become a widely adopted benchmark for evaluating large language models (LLMs) on code-generation tasks. By curating competitive programming problems, constantly adding fresh problems to the set, and filtering them by release dates, LCB provides contamination-aware evaluation and offers a holistic view of coding capability. However, LCB remains restricted to Python, leaving open the question of whether LLMs can generalize across the diverse programming languages required in real-world software engineering. We introduce Multi-LCB, a benchmark for evaluating LLMs across twelve programming languages, including Python. Multi-LCB transforms Python tasks from the LCB dataset into equivalent tasks in other languages while preserving LCB's contamination controls and evaluation protocol. Because it is fully compatible with the original LCB format, Multi-LCB will automatically track future LCB updates, enabling systematic assessment of cross-language code generation competence and requiring models to sustain performance well beyond Python. We evaluated 24 LLMs for instruction and reasoning on Multi-LCB, uncovering evidence of Python overfitting, language-specific contamination, and substantial disparities in multilingual performance. Our results establish Multi-LCB as a rigorous new benchmark for multi-programming-language code evaluation, directly addressing LCB's primary limitation and exposing critical gaps in current LLM capabilities.