This study uses a documentary and comparative-analytical method to compare four free AI tools, including ChatGPT, Gemini 2.0, LLaMA 3.1, and Claude 3.5, in the field of educational applications. The results show that Gemini 2.0 and Claude 3.5 perform outstandingly in scalability, content accuracy, ethics, and collaboration with teachers due to their integration with Google infrastructure. In contrast, GPT-3, despite its ability to personalize learning and interactivity, does not reach Gemini 2.0 and Claude 3.5 in the accuracy of specialized content and performance evaluation. LLaMA 3.1 also has limitations in interactivity and general educational applications due to its focus on research. In addition, Gemini 2.0 and Claude 3.5 perform better in privacy and compliance with ethical standards, although there are concerns about data security in all tools. According to the findings, Gemini 2.0 and Claude 3.5 are considered suitable options for advanced educational applications. It is suggested that higher education and distance education planners in Iran, by identifying the needs of users, benefit from the capabilities of these tools in personalizing learning, scalability, and providing accurate content. Also, to promote interactivity and security, it is necessary to adapt domestic educational platforms to ethical standards. Developing privacy regulations, increasing user awareness about safe use, and creating sustainable infrastructures based on modern technologies will be effective steps in developing the Iranian digital education system.