Title: DevBench: A Realistic, Developer-Informed Benchmark for Code Generation Models
Primary area: datasets and benchmarks
Keywords: Code Generation, Telemetry-Guided, LLM Evaluation, Software Development, Ecological Validity, Functional Correctness, Similarity Metrics, Contamination-Free Evaluation

Abstract: DevBench is a telemetry-driven benchmark designed to evaluate Large Language Models (LLMs) on realistic code completion tasks. It includes 1,800 evaluation instances across six programming languages and six task categories derived from real developer telemetry, such as API usage and code purpose understanding. Unlike prior benchmarks, it emphasizes ecological validity, avoids training data contamination, and enables detailed diagnostics. The evaluation combines functional correctness, similarity-based metrics, and LLM-judge assessments focused on usefulness and contextual relevance. 9 state-of-the-art models were assessed, revealing differences in syntactic precision, semantic reasoning, and practical utility. Our benchmark provides actionable insights to guide model selection and improvement—detail that is often missing from other benchmarks but is essential for both practical deployment and targeted model development.