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Since its launch in November 2022, ChatGPT, the AI chatbot developed by OpenAI, has revolutionized how users interact with artificial intelligence. Designed to generate text from simple prompts, this tool has evolved from a productivity solution to an essential platform with 400 million weekly active users in February 2025.
The evolution of ChatGPT: from 2022 to 2025
Rapid adoption
Launched on November 30, 2022, ChatGPT has established itself as a versatile tool for writing essays, coding, or answering complex questions. According to a report from Andreessen Horowitz, the number of weekly active users grew from 100 million in November 2023 to 400 million in February 2025, with notable growth following the launch of the GPT-4o model in May 2024. This massive adoption reflects ChatGPT‘s ability to adapt to varied needs, from individuals to enterprises.
Key moments in 2024
2024 was a pivotal year for OpenAI. Among the major advances, we can highlight:
- Partnership with Apple: ChatGPT was integrated into Apple Intelligence, strengthening its presence on iOS devices.
- Launch of GPT-4o: This multimodal model, capable of processing text, images, and voice, improved ChatGPT‘s conversational capabilities.
- Release of Sora: The text-to-video generation model expanded the scope of OpenAI’s AI applications.
- Voice improvements: The Advanced Voice update made voice interactions more natural, available to all paying users.
However, 2024 was also marked by internal challenges, with the departure of key figures such as co-founder Ilya Sutskever and Chief Technology Officer Mira Murati, as well as legal disputes for copyright infringement filed by newspapers owned by Alden Global Capital.
What’s new in 2025
New models and performance
In 2025, OpenAI continues to innovate with models such as GPT-4.1 and GPT-4.1 mini, launched in May 2025. These models, optimized for coding and instruction-following, surpass the previous o3 and o4-mini in terms of speed and accuracy. The codex-1 model, for example, generates cleaner code and takes between 1 and 30 minutes for tasks like bug fixing or feature writing.
OpenAI has also unveiled o3-pro, an improved version of its o3 reasoning model, accessible to ChatGPT Pro and Team users since June 2025. Enterprise and Edu users will have access starting the third week of June.
Personalization and memory
A major update allows ChatGPT to memorize previous conversations to provide more personalized responses. This feature, deployed first for Pro and Plus subscribers (excluding certain countries like the EU), aligns with the vision of Sam Altman, OpenAI’s CEO, who wants ChatGPT to become an assistant capable of “remembering every detail of a user’s life”.
Integration of the MCP protocol
The MCP protocol (open-source) improves the accuracy of responses by establishing bidirectional links between data sources and AI applications. Available via the Agents SDK, it will soon be integrated into the ChatGPT desktop application and the Responses API, strengthening the development ecosystem.
Towards GPT-5
OpenAI has cancelled the independent release of the o3 model to focus on GPT-5, expected in the coming months. According to Sam Altman, GPT-5 will integrate advanced technologies, including elements of o3, to provide a simplified and more powerful experience.
Features and use cases
Multimodality and accessibility
ChatGPT is built on GPT-4o, a multimodal model capable of processing text, images, and files such as PDFs or spreadsheets. Free users have access to GPT-4o mini, with features like data analysis and access to the GPT Store, a marketplace of personalized AI applications. Paying subscribers benefit from higher usage limits and advanced features like Advanced Voice and o3-mini.
Professional applications
Many companies are adopting ChatGPT, notably through ChatGPT Team ($25-30 per user/month) and ChatGPT Enterprise, which offer management tools and personalized applications. ChatGPT Edu and OpenAI for Nonprofits provide tailored solutions for educational institutions and NGOs, with significant discounts.
Third-party integrations
ChatGPT integrates with platforms such as Windows 11 via Microsoft’s Bing experience, and other technology companies are exploring its potential to automate responses or improve customer service.
Challenges and controversies
Legal disputes
OpenAI faces accusations of copyright infringement, notably for the use of content without authorization. A recent update to the image generation tool produced memes inspired by Studio Ghibli, raising concerns about the unauthorized use of protected material. Elon Musk has also filed an injunction to block OpenAI’s transition to a for-profit model.
Energy consumption
Each request to ChatGPT consumes approximately 0.34 watt-hours of electricity and the equivalent of a fraction of a drop of water (0.000083 gallons). While modest on an individual scale, this consumption raises questions about environmental impact at scale.
International competition
In 2025, OpenAI faces the perception that it is losing ground to Chinese rivals such as DeepSeek. This competitive pressure is driving the company to accelerate its innovations, as evidenced by the announcement of GPT-5.
Outlook for the future
Sustained growth
OpenAI plans to triple its revenues to $12.7 billion in 2025, thanks to the popularity of its paid subscriptions. User growth, driven by features like GPT-4o and Advanced Voice, is expected to continue.
Challenges to overcome
To maintain its leadership, OpenAI will need to resolve its legal disputes, improve transparency of its models, and address environmental concerns. The integration of GPT-5 and the expansion of the GPT Store will be crucial to remain competitive.
ChatGPT continues to redefine the possibilities of artificial intelligence, evolving from a simple chatbot to a multimodal platform integrated into daily and professional life. With innovations like GPT-4.1, o3-pro, and the awaited GPT-5, OpenAI is pushing the boundaries of AI while navigating a complex competitive and legal landscape. Whether you are a casual user, a developer, or an enterprise, ChatGPT provides powerful tools to transform how we work and interact with technology.
Stay tuned for upcoming updates, particularly the launch of GPT-5, which promises to mark a new chapter in the evolution of AI.
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