Background: Artificial intelligence (AI) has emerged as a powerful tool in scientific research and publication. The AI tools trained on large data can execute research-related tasks and revolutionize how research is conducted and disseminated, though it faces potential challenges and pitfalls. Major publishing-related organizations, scientific journals, and publishers have issued policies regarding the responsible use of AI in scientific publications. Within an overarching AI governance policy, BMJ Group mandates authors who are submitting scholarly work to disclose and describe their use of AI tools, the reasons for using the AI, and the tasks completed by the AI. Objectives: To assess the frequency authors disclose using AI in manuscripts submitted to BMJ Group journals, the types of AI tools used, the reasons for its use, and the tasks it is used for. Methods: A cross-sectional meta-research study will be conducted on a cohort of research manuscripts of original research, which were submitted to 49 BMJ biomedical journals between 08 April and 06 November 2024. Characteristics will be captured at the journal, manuscript, and author levels. Chi-square test will be used to compare these characteristics for authors using AI, types of AI tools used, reasons for using the AI tool, and tasks it is used for. Factors associated with authors declaring using AI will be assessed using binominal regression analysis.