OpenAI valued at $1.25 trillion as funding round falls short of its target

A stage in which a startup raises money from investors, named in sequence such as seed, Series A and Series B.

Each round sets a valuation and shows how much confidence investors have in the company.

Computer systems that perform tasks that normally require human intelligence, such as understanding language, recognising images or making decisions.

AI is changing work, media and public services, raising questions about jobs, safety and regulation.

The first sale of a private company's shares to the public, after which the shares trade on a stock exchange.

An IPO raises money for the company and lets early owners and investors sell part of their stake.

A digital currency secured by cryptography and recorded on a blockchain, without a central bank issuing it.

Crypto prices are volatile, and governments are still deciding how to regulate it.