But the unsolicited bid might not be a failure – at least as far as Musk is concerned, experts say.

That’s because the offer could still complicate CEO Sam Altman’s plans to transform OpenAI from a non-profit controlled entity to a for-profit company.

Musk is “basically trying to stymie OpenAI’s growth trajectory,” said University of Cambridge associate teaching professor Johnnie Penn in an interview with the BBC.

Profit & non-profit

Last week, Musk and a consortium of investors including Hollywood superagent Ari Emanuel tabled a $97.4bn (£78.4bn) offer for all of OpenAI’s assets.

It was a huge sum – but less than the $157bn the firm was valued at in a funding round just four months ago, and much lower than the $300bn that some think it is worth now.

Complicating all of this is OpenAI’s unusual structure which involves a partnership between non-profit and for-profit arms.

Mr Altman is understood to want to change that, stripping it of its non-profit board.

That involves costs which Mr Musk is seemingly trying to inflate.

“What Musk is trying to do here is raise the perceived value of the non-profit arm of OpenAI, so that OpenAI has to pay more to get out of the obligations it has to its own non-profit,” said Dr Penn.

The value of its non-profit assets isn’t clear. With his bid, Musk was floating a price, according to Cornell University senior lecturer Lutz Finger, who is also the founder and CEO of AI startup R2Decide.

“By Musk putting a price tag on the non-profit part, he makes the split way more expensive for Altman to do,” Mr Finger told the BBC. “It’s very simple.”

Mr Musk justified his actions by saying he wants to return OpenAI – which he co-founded – to its non-profit roots and original mission of developing AI for the benefit of humanity.

Others, though, suggest he has somewhat less noble motives linked to his own AI company xAI and chatbot Grok, which have received a lacklustre response from the public.

“Musk has missed the AI train, somewhat. He’s behind, and he has made several attempts to catch up,” Mr Finger said.

Now, Mr Finger says, Mr Musk is trying to kneecap his most formidable competitor.

An already-tense relationship appeared to worsen further last week with Mr Altman taunting Mr Musk’s offer on X, and Mr Musk retorting by calling his onetime partner a “swindler”.

Mr Altman then hit back in an interview with Bloomberg, opining that Mr Musk is not “a happy person” and saying his decisions are made from a “position of insecurity”.

The tit-for-tat is also playing out in court, where US district judge Yvonne Gonzalez Rogers is considering Mr Musk’s request for an injunction that would block OpenAI from its planned conversion.

He claims that he will be irreparably harmed without her intervention.

“It is plausible that what Mr Musk is saying is true. We’ll find out. He’ll sit on the stand,” Gonzalez Rogers said during a hearing in Musk v Altman earlier this month in Oakland, California.

According to OpenAI’s lawyers, Mr Musk’s recent bid contradicts his earlier claims that OpenAI’s assets cannot be transferred away for “private gain.”

“[O]ut of court, those constraints evidently do not apply, so long as Musk and his allies are the buyers,” their reply brief states.

Some observers say making a deal never appeared to be his goal.

“I think he’s just trying to create noise and news and consternation,” says Karl Freund, founder and principal analyst at Cambrian-AI.

But in addition to causing problems for his old rival, that strategy could inflict lasting damage on Mr Musk’s own reputation.

“He’s brilliant. He creates incredible companies that are doing incredible things. But his personal agenda is causing people to question his motives,” Mr Freund said.

The lawsuit, which was filed on 6 January in a US District Court in the Eastern District of Missouri, alleges that the abuse started when she was three and Mr Altman was 12.

In a joint statement on X, with his mother and two brothers, Mr Altman denied the allegations, saying “all of these claims are utterly untrue.”

“Caring for a family member who faces mental health challenges is incredibly difficult,” the statement added.

“This situation causes immense pain to our entire family.”In the filing, which has been seen by the BBC, Ms Altman alleged that the abuse, which took place over many years, included rape.

The lawsuit added the last instance of the alleged abuse took place when Mr Altman was an adult but she was still a minor.

The lawsuit requested a jury trial and damages in excess of $75,000 (£60,100).

Ms Altman has previously made similar allegations against her brother on social media platforms such as X.

Mr Altman is one of the technology world’s most high profile figures.In late 2022, OpenAI launched the ChatGPT generative artificial intelligence (AI) chatbot.