OpenAI launched ChatGPT and reached 100 million users in months; conversational AI became a global habit.
On November 30, 2022, OpenAI launched ChatGPT, a chat UI over an instruction/RLHF model. Product simplicity—not the paper—changed everything.
Schools, companies, and governments reacted at different speeds. Google declared “code red”; an assistant race began.
ChatGPT was not the first LLM, but it was the first in mass public cognition: since then AI history is also product and distribution history.
At DevDay (29 September 2026) OpenAI launched the ChatGPT Pro 500 plan ($500/month) with Ultrafast speed—up to 300 tokens/s in Codex—and said that from 30 October Pro 200 ($200) will fall from 20× to 10× the Plus allowance in Work and Codex. The Next Web and Engadget detail $2,500 credits for current subscribers through year-end.
OpenAI is rolling out Health in ChatGPT to logged-in U.S. users age 18+ on web and iOS across Free, Go, Plus and Pro, with optional links to supported medical records and Apple Health. The company stresses it does not replace professional care.
Since October 7, GPT-6 can turn ChatGPT answers into interactive tools such as calculators, diagrams, maps and forms; the rollout began on paid plans and expands to Free and Go from October 8.