IDA CoPilot is an open-source plugin for the IDA Pro disassembler that leverages GPT-style large language models to assist reverse engineers. It can generate detailed function summaries, suggest descriptive names for functions and variables, produce inline comments explaining assembly instructions, and offer pseudocode interpretations. By integrating directly into the IDA UI, it provides context-aware AI suggestions to accelerate malware analysis, vulnerability research, and binary auditing.