Tesla knocked $2,000 off the prices of three of its five models in the U.S.

The company is one of the worst-performing stocks in the S&P 500.

AI experts speak to ABC News about the difference between open-source and closed-source AI, and why it matters that Elon Musk released the code for his AI chatbot.

Following an exclusive nonrestrictive interview with Don Lemon, Elon Musk has cancelled their partnership.

The move centers on a key issue in the fight to shape AI.

The sit-down interview was supposed to mark the launch of a new partnership between the former CNN anchor and Elon Musk’s X, but instead Lemon says the deal was abruptly called off.

Elon Musk sued OpenAI and its CEO Sam Altman on Friday alleging the ChatGPT maker abandoned its mission of benefiting humanity in a sprint toward profits.

Musk said that Open AI’s executives are in violation of an agreement that the company would not use their technology to pursue profits.

The lawsuit marks a major escalation in Musk's contentious relationship with Open-AI and its CEO Sam Altman.

ABC News business reporter Alexis Christoforous delivers the latest business headlines.

The Neuralink's chip has been designed to help patients with paralysis communicate with computers.

Neuralink, owned by billionaire Elon Musk, has announced they have implanted a wireless chip into a human brain for the first time.

Neurologist Leah Croll breaks down how the medical device works and who would benefit most.

Neuralink says its goal is to help people living with debilitating conditions, including paralysis, communicate and control external devices with their thoughts.

Neuralink’s goal is to help paralysis patients communicate by connecting their brain to a computer.

The move would tie the company's fate closer to its high-profile founder.

The valuation amounts to tens of billions of dollars in losses.

Ongoing losses could make a sale attractive for Elon Musk but obstacles to such a move remain.

ABC News’ Alexis Christoforus talks about what X CEO Elon Musk said about advertisers pulling out of the social media platform.

The remarks follow a weekslong advertising exodus from X, formerly known as Twitter.

Musk said at the annual New York Times DealBook Summit companies that pulled their advertisements over hate speech on the platform are engaging in “blackmail.”

The X owner says the ad boycott stemming from his comments on Jewish people is “going to kill” his social media company. ABC News’ Rhiannon Ally reports.

Billionaire Elon Musk joined Prime Minister Benjamin Netanyahu in visiting Kfar Azza after backlash over antisemitic comments on X, resulting in brands pausing ads on the platform.

Elon Musk’s social media platform alleges that the watchdog organization defamed X after it published a report that said ads for major brands had appeared next to posts touting Nazism.

Apple, IBM, Lionsgate, Paramount and Disney pulled ads from X, formerly Twitter, after Musk posted in agreement with a false and antisemitic conspiracy theory about Jewish people on the platform.

Major companies are halting their advertising on "X" following an antisemitic post from owner Elon Musk.

The billionaire and owner of media platform X (formally known as Twitter) came under fire for agreeing with antisemitic comments on the platform.

The owner of the platform is taking heat from X users for his response to a message shared by another user.

The Securities and Exchange Commission on Thursday sought to force Elon Musk to sit for a deposition as part of an ongoing investigation about his purchase of Twitter.

Musk, along with other tech giants, convened on Wednesday to discuss the importance of regulating artificial intelligence.

The billionaire entrepreneurs have gone back and forth on the plans for weeks.

The billionaire entrepreneurs have gone back and forth on the plans for weeks.

The heads of Facebook and X are potentially going over details to make a fight between them a reality.

The task of overtaking X poses a formidable challenge but Threads holds advantages, they said.

Owner Elon Musk said that Twitter's familiar bird logo will soon be replaced by the letter "X."

Elon Musk says Twitter has "negative cash flow" and "heavy debt" due to lack of advertisers.

Elon Musk has previously criticized the pace and ambitions of advances in AI.

The notice came after the reported resignation of two of Twitter's data security executives.

ABC News' Alex Presha discusses what Ron DeSantis’ campaign is saying about the technical glitches and the first events he has planned to kick off his campaign.

Virgin Islands subpoenas Elon Musk in lawsuit against JP Morgan

The subpoena appears to seek information about whether Jeffrey Epstein referred or attempted to refer Musk to JPMorgan, according to the Virgin Islands.

Elon Musk made the announcement in a tweet on Thursday.

Twitter reversed a major change to its subscription policy over the weekend.

Biased AI poses risks but Musk underscores the challenge, experts said.

Elon Musk announced plans this week to create an AI-driven conversation tool called "TruthGPT."

Owned by Elon Musk, NPR said that the social media company’s label of their organization is meant to undermine its credibility.

The former Twitter employee had posted a tweet asking CEO Elon Musk about his job status.

There are questions surrounding a multi-billion dollar deal involving Tesla stock.

Tesla faces weakening demand amid heightened competition.

The losses at Tesla wiped nearly $50 billion from the company's value and elicited scrutiny of CEO Elon Musk.