Objective: Assess ChatGPT in therapy planning for early breast cancer in a MDT setting.Prompts:Inquire about the appropriate treatment approach for a patient with specific details regarding their breast cancer diagnosis. This includes age, TNM status, receptor expressions, HER2 status, Ki67 levels, tumour grading, and any relevant genetic mutations.Additional characteristics: Specificity: YesIterative prompting: NoContext provided: YesSetting boundaries: No Directiveness: No. This evidence concerns the gene ERBB2 and breast carcinoma.