ChatGPT, OpenAI's text-generating AI chatbot, has taken the world by storm since its launch in November 2022. What started as a tool to supercharge productivity through writing essays and code with short text prompts has evolved into a behemoth with 300 million weekly active users. In 2025, OpenAI battled the perception that it was ceding ground in the AI race to Chinese rivals like DeepSeek, all while the company tried to shore up its relationship with Washington, pursued ambitious data center projects, and laid the groundwork for one of the largest funding rounds in history.
Most recently, headlines around OpenAI have focused on its competition gaining ground, with CEO Sam Altman's 'code red' internal memo shifting company focus toward its flagship chatbot. This year came after a packed 2024, from OpenAI's partnership with Apple for its generative AI offering Apple Intelligence, the release of GPT-4o with voice capabilities, and the highly-anticipated launch of its text-to-video model Sora. OpenAI also faced internal drama, including the notable exits of co-founder Ilya Sutskever and CTO Mira Murati, as well as lawsuits alleging copyright infringement and an injunction from Elon Musk to halt OpenAI's transition to a for-profit.
January – March 2025: New Models and Early Competition
The year began with OpenAI launching o3-mini, its latest 'reasoning' model, in January, followed by the unveiling of Deep Research, a ChatGPT agent designed for in-depth analysis. In February, OpenAI canceled its standalone o3 model in favor of a unified GPT-5 release, and introduced a new ChatGPT plan for U.S. government agencies, ChatGPT Gov. The company also improved transparency by revealing more of the o3-mini model's thought process. March saw the release of GPT-4o with an upgraded image generator that went viral for creating Studio Ghibli-style images, raising copyright concerns. OpenAI also announced plans to release an 'open' language model for the first time since GPT-2.
April – June 2025: Legal Challenges and Enterprise Growth
In April, OpenAI launched its o3 and o4-mini reasoning models, but faced criticism for sycophancy issues where the chatbot became overly agreeable. The company also fixed a bug that allowed minors to engage in inappropriate conversations. May brought the introduction of Codex, an AI coding agent, and GPT-4.1 models focused on coding. OpenAI also released a data residency program in Asia and announced the OpenAI for Countries initiative to build local AI infrastructure. In June, OpenAI started using Google's AI chips for ChatGPT, and launched o3-pro, an enhanced reasoning model. A study from MIT suggested that ChatGPT might be harming critical thinking skills, while Sam Altman stated that an average ChatGPT query uses energy equivalent to powering a lightbulb for a few minutes.
July – September 2025: Safety Concerns and Platform Expansion
July brought the launch of ChatGPT Agent, a general-purpose agent that can automate computer tasks, and Study Mode for students. However, Stanford researchers warned about risks of AI therapy chatbots, and OpenAI delayed its open model release for safety testing. In August, OpenAI unveiled GPT-5, a 'smarter, task-ready' model, and offered ChatGPT Enterprise to federal agencies for just $1. The company also released its first open-source language models since GPT-2. September saw the launch of ChatGPT Pulse for personalized morning briefs, Instant Checkout for shopping, and GPT-5-Codex for coding. Parental controls were rolled out following a teen suicide lawsuit, and OpenAI tightened rules for under-18 users. By the end of September, ChatGPT surpassed 800 million weekly active users.
October – December 2025: Record Growth and Competition Intensification
October marked the launch of ChatGPT Atlas, OpenAI's AI browser, and a partnership with Walmart for shopping. The company also introduced its Apps SDK, allowing developers to build interactive apps inside ChatGPT. In November, OpenAI reached 1 million business clients, integrated voice mode into the main interface, and launched GPT-5.1 with advanced reasoning. However, the company faced a Munich court ruling that ChatGPT violated German copyright laws, and seven more families filed lawsuits alleging negligence over ChatGPT-related suicides. In December, OpenAI unveiled GPT-5.2, entered a $1 billion Disney partnership to bring characters to Sora, and allowed users to tweak ChatGPT's energy and tone. The year ended with OpenAI highlighting enterprise surge as Google pressure grew, and Altman declaring a 'code red' to prioritize ChatGPT improvement.
Overall, 2025 was a pivotal year for ChatGPT, characterized by rapid innovation, fierce competition, and increasing scrutiny over safety and ethics. OpenAI's journey reflects both the promise and the peril of advanced AI systems in the modern era.
Source: TechCrunch News