In 2025, OpenAI's ChatGPT continued its meteoric rise, cementing its place as one of the most influential AI products ever created. The year was marked by dramatic product launches, intense competition, legal battles, and a massive surge in user adoption. From the release of GPT-5 to a groundbreaking partnership with Disney, the timeline below captures the key moments that defined ChatGPT's journey throughout the year.
January 2025
The year kicked off with the launch of Operator, an AI agent that could autonomously perform web-based tasks like booking travel and shopping online, initially available to Pro subscribers. OpenAI also released o3-mini, a new reasoning model designed to be both powerful and affordable. The company introduced ChatGPT Gov, a dedicated plan for US government agencies, and began testing phone-number-only signups in India and the US. Additionally, the Tasks feature allowed users to set reminders and recurring prompts.
February 2025
OpenAI unveiled Deep Research, a new agent for in-depth multi-source research. In a significant strategic shift, CEO Sam Altman announced the cancellation of the standalone o3 model in favor of a unified GPT-5 release. The company also made ChatGPT web search available without requiring a login, and updated the o3-mini model to show more of its reasoning steps.
March 2025
March was dominated by a major upgrade to ChatGPT's image generation capabilities, powered by GPT-4o, which went viral for creating Studio Ghibli-style images. OpenAI also released an improved voice mode, launched new transcription and text-to-speech models, and announced plans for an open-source language model. The company reported that revenue was expected to triple to $12.7 billion in 2025.
April 2025
OpenAI released the GPT-4.1 family of models focused on coding, alongside new reasoning models o3 and o4-mini. The company began sunsetting the original GPT-4 model, introduced a “library” for images, and fixed a sycophancy bug that made ChatGPT overly agreeable. OpenAI also confirmed it was building its own social media network.
May 2025
The company introduced Codex, an AI coding agent capable of handling complex software engineering tasks. GPT-4.1 became available directly in ChatGPT. OpenAI launched the affordable ChatGPT Go plan in India and announced plans to purchase devices startup io from Jony Ive for $6.4 billion to drive hardware integration.
June 2025
OpenAI released o3-pro, an enhanced reasoning model, and upgraded Advanced Voice Mode for all paid users. New enterprise features included meeting recordings and connectors for Google Drive and Box. The company also launched a general-purpose ChatGPT Agent capable of autonomous computer-based tasks.
July 2025
OpenAI introduced Study Mode for students, promoted critical thinking, and began rolling out parental controls. CEO Sam Altman cautioned users that ChatGPT conversations are not confidential like therapy. The company delayed its open-weight model release for additional safety testing, and ChatGPT reached 2.5 billion daily prompts.
August 2025
The biggest release of the year: GPT-5, a smarter, multi-task model with three modes—Auto, Fast, and Thinking. OpenAI also released its first open-weight models since GPT-2. The ChatGPT mobile app surpassed $2 billion in revenue, and the company offered ChatGPT Enterprise to federal agencies for just $1. A Reddit AMA from Altman addressed initial GPT-5 glitches.
September 2025
OpenAI launched ChatGPT Pulse, a morning briefing feature, and Instant Checkout for shopping via Etsy and Shopify. The company introduced GPT-5-Codex for coding, reorganized its Model Behavior team, and tightened safety rules for teen users following a high-profile lawsuit.
October 2025
The ChatGPT Atlas browser was launched on Mac, positioning ChatGPT as a primary search tool. Walmart joined as a shopping partner, and developers gained the ability to build interactive apps inside ChatGPT. ChatGPT surpassed 800 million weekly active users. OpenAI also revealed it was working on a music generation tool.
November 2025
Group chats were rolled out to all users. The GPT-5.1 update brought warmer conversational tones and improved reasoning. OpenAI announced it had reached 1 million business clients. The company launched an AI shopping assistant and faced multiple lawsuits, including a Munich court ruling that ChatGPT violated music copyright laws. Seven families sued OpenAI over alleged links between ChatGPT and teen suicides.
December 2025
The year ended with the release of GPT-5.2 in three versions: Instant, Thinking, and Pro. OpenAI partnered with Disney in a $1 billion deal that brought over 200 characters to Sora. New controls allowed users to tweak ChatGPT's tone and energy. ChatGPT became the fastest app to hit $3 billion in mobile revenue. Amidst rising competition from Google, Altman declared a “code red” internal memo, prioritizing ChatGPT over other initiatives like advertising.
Source:TechCrunch News