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Microsoft Ends Azure Exclusivity for OpenAI, Shares Slip.

4/28/2026

Summary

Microsoft Ends Exclusivity

Microsoft announced ending Azure’s exclusive cloud rights for OpenAI models, allowing OpenAI to sell on any cloud.
Microsoft will keep a license to OpenAI IP through 2032 and a 20% revenue share until 2030.
Microsoft stops paying any revenue share to OpenAI but retains its roughly 27% stake valued over $135 billion.
After the news Microsoft shares fell 2%–3% while Amazon rose 1% and Alphabet 1.5%.

Summary

Musk Sues OpenAI

Elon Musk sued OpenAI in Oakland, alleging breach of its nonprofit charter and seeking $134 billion in damages, plus $150 billion because Sam Altman and others turned the charity into a for-profit venture.
Musk contributed about $38 million to OpenAI early on expecting it to stay nonprofit.
Jury selection began on April 27 2026, with Altman, Musk and Microsoft CEO Satya Nadella to testify, Microsoft is a co-defendant for allegedly enabling the charter breach.

Summary

OpenAI Secures Amazon

OpenAI signed a deal up to $50 billion with Amazon, giving AWS exclusive rights to host the stateful Frontier.
OpenAI will add $100 billion to its existing $38 billion AWS agreement over the next eight years.
Azure stays exclusive host for all stateless OpenAI API calls, even when OpenAI products run on other clouds.
Amazon’s $15 billion initial tranche and $35 billion contingent tranche let enterprises run OpenAI models on AWS, Azure or Google Cloud.

History

Historical Context

OpenAI, founded as a nonprofit in December 2015, secured a $1 billion Microsoft investment in 2019 that gave Azure exclusive access and a sizable equity stake. After Musk sued OpenAI and Altman in February 2024 over profit-driven direction, the 2026 lawsuit against Altman and Microsoft’s Nadella reflects a broader move from single-vendor cloud ties to diversified, multi-cloud AI deployments.

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Microsoft Ends Exclusivity

Microsoft announced ending Azure’s exclusive cloud rights for OpenAI models, allowing OpenAI to sell on any cloud.
Microsoft will keep a license to OpenAI IP through 2032 and a 20% revenue share until 2030.
Microsoft stops paying any revenue share to OpenAI but retains its roughly 27% stake valued over $135 billion.
After the news Microsoft shares fell 2%–3% while Amazon rose 1% and Alphabet 1.5%.

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