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Each item is one event, written from several sources, with a footnote for every fact.

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Update

OpenAI starts testing ads in ChatGPT

In January 2026 OpenAI began testing ads in ChatGPT for free adult users in the US, later extending them to its Go tier. Ads appeared in March 2026, and by August the ad business was at a $1 billion annualised run rate.

Update

OpenAI launches ChatGPT search

On 31 October 2024 OpenAI launched ChatGPT search for Plus and Team users, evolving from the SearchGPT prototype. It drew on third-party search providers and content from many news publishers, and it became free without an account in February 2025.

Update

NotebookLM adds Audio Overviews

On 11 September 2024 Google added Audio Overviews to NotebookLM, turning a user's sources into a spoken discussion between two AI hosts; interactive questions came in December 2024 and Video Overviews in July 2025.

Update

OpenAI announces ChatGPT plugins

On 23 March 2023 OpenAI announced ChatGPT plugins, which connected the chatbot to third-party services and the web, letting it fetch current information, run computations and use outside tools.