Skywork-o1-Open-PRM-Qwen-2.5-1.5B is part of a series developed by the Skywork team, which combines the slow thinking and reasoning capabilities characteristic of the o1 style. This model is specifically designed to enhance reasoning skills through incremental process rewards, making it suitable for solving small-scale complex problems. Unlike simple reproductions of the OpenAI o1 model, the Skywork o1 Open series not only demonstrates inherent thinking, planning, and reflection abilities in its outputs but also shows significant improvements in reasoning skills on standard benchmarking tests. This series represents a strategic advancement in AI capabilities, pushing inherently weaker foundational models towards state-of-the-art (SOTA) performance in reasoning tasks.