At the end of 2022, OpenAI unveiled ChatGPT, marking the first easy access to large language models (LLMs), which rapidly gained immense popularity. By September 2025, ChatGPT boasted approximately 700 million weekly active users and numerous plugins. The timeline of ChatGPT’s evolution includes key milestones: from the initial research on generative models in 2016 to the launch of ChatGPT in November 2022, and its subsequent premium offering, ChatGPT Plus, in February 2023. Significant developments followed, including the integration of Microsoft Bing features, the introduction of the ChatGPT API, and the release of GPT-4. OpenAI continuously innovates with features like custom instructions, ChatGPT Enterprise, and the GPT Store, enhancing user experiences and adaptability. As of August 2025, compared to competitors like Google’s Gemini, ChatGPT maintains a leading position in the AI landscape, exemplifying exponential growth in user engagement and technological advancement.
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