In a court filing, Mr. Musk said he and other investors would pull their $97.4 billion bid if OpenAI withdrew its plan to change its structure.

The company answered the billionaire’s offer in a legal filing, accusing him of hypocrisy.

The Chinese start-up used several technological tricks, including a method called “mixture of experts,” to significantly reduce the cost of building the technology.

The billionaire is leading a group of investors in the unsolicited offer, which complicates the start-up’s plan to raise more money.

After helping President Trump get elected, Elon Musk was poised to dominate the country’s A.I. policies. Then Mr. Altman sneaked into the White House.

The Southern California start-up, which builds flying drones and missiles, is set to raise up to $2.5 billion.

The Japanese conglomerate SoftBank would invest up to $40 billion in the maker of the chatbot ChatGPT.

The tool, called Deep Research, arrives days after OpenAI released another one, which shops for groceries and books restaurant reservations.

A new investment from the Japanese conglomerate would be separate from the $100 billion tied to a project announced at the White House last week.

The San Francisco start-up claims that its Chinese rival may have used data generated by OpenAI technologies to build new systems.

The Silicon Valley giant was criticized for giving away its core A.I. technology two years ago for anyone to use. Now that bet is having an impact.

The new tool, called Operator, can shop for groceries or book a restaurant reservation. But it still needs help from humans.

The company built a cheaper, competitive chatbot with fewer high-end computer chips than U.S. behemoths like Google and OpenAI, showing the limits of chip export control.

The company said its Columbus plant could eventually produce tens of thousands of autonomous systems and weapons each year.

The maker of ChatGPT hopes to spur investment from the Middle East and avoid strict regulations on the development of new technologies.

OpenAI’s chief executive and founder denies the allegations, which are similar to claims his sister has long made online.

The financing efforts follow new funding rounds by Elon Musk’s xAI and the market leader, OpenAI, which is now valued at $157 billion.

OpenAI said it would be restructured as a public benefit corporation, and that the nonprofit that controls the organization would receive shares in the new company.