Musk admits underestimating Anthropic, handing Amazon and Alphabet a $100B win

Elon Musk's public admission that he underestimated Anthropic validates a nearly $1 trillion AI bet — and the biggest winners may be Amazon and Alphabet.

Elon Musk's concession that Anthropic is "obviously currently the leader in AI" has validated a nearly $1 trillion valuation for the startup — and handed Amazon and Alphabet a combined equity stake worth more than $200 billion.

"I was clearly wrong about Anthropic," Musk wrote on X, reversing his earlier dismissal that "winning was never in the set of possible outcomes for Anthropic." The CEO of SpaceXAI and xAI called the startup's latest Claude models, Mythos and Fable, the strongest in the industry.

Amazon holds a stake in the mid-to-high teens of Anthropic, while Alphabet owns roughly 14%, positions each worth well over $100 billion at Anthropic's latest valuation near $965 billion. Amazon alone has committed around $33 billion, with a pledge to invest tens of billions more as milestones are hit. Anthropic has also committed to spending more than $100 billion on Amazon Web Services over the next decade and roughly $200 billion on Google Cloud over five years.

The double benefit — equity appreciation plus anchor cloud revenue — creates a rare structure where both Amazon and Alphabet win twice from a single relationship. But investors should separate the paper gains from sustainable earnings: Amazon booked billions in pretax gains in a single quarter simply because Anthropic's valuation rose, not from operating profit.

The Infrastructure Connection

Musk's about-face came weeks after SpaceXAI and Anthropic entered a major compute partnership. According to SpaceX's S-1 filing, Anthropic secured access to more than 300 megawatts of compute capacity at SpaceX's Colossus 1 data center, representing more than 220,000 Nvidia GPUs. Anthropic agreed to pay roughly $1.25 billion a month for the service through May 2029, though either company can end the agreement with 90 days' notice.

The arrangement highlights a paradox at the heart of the AI industry: even leading developers rely on competitors or external partners for the enormous computing power required to train and deploy advanced models. Musk, who runs a competing AI lab at xAI, now supplies critical infrastructure to a direct rival while publicly praising its products.

What the Market Is Pricing

Prediction markets have priced a 92% probability that Anthropic reaches a $1.25 trillion valuation by the end of 2026, according to Vera data. The company raised $30 billion in its most recent funding round, and Musk's endorsement has only strengthened confidence in its trajectory.

For Amazon and Alphabet, the stakes extend beyond their equity positions. Anthropic's cloud commitments — $100 billion to AWS and $200 billion to Google Cloud — represent a decade of locked-in revenue that could meaningfully shift the competitive balance in cloud computing. Amazon's custom Trainium chips and Alphabet's own AI accelerators stand to benefit as Anthropic scales its infrastructure.

Amazon shares trade at roughly 22 times forward earnings, while Alphabet trades at about 21 times. The market has not fully priced in the recurring cloud revenue from the Anthropic relationship, according to analysts tracking the sector. If Anthropic maintains its leadership position through its planned IPO, the equity stakes alone could add several dollars per share to both companies' valuations.

This article is for informational purposes only and does not constitute investment advice.