OpenAI, the developer of ChatGPT, is considering filing an antitrust complaint with US regulators against Microsoft, its largest investor. The move comes amid a deepening dispute between the two companies over their business partnership.
Microsoft has invested $1 billion in OpenAI since 2019 and holds exclusive rights to host OpenAI models on its Azure cloud platform. However, OpenAI wants to transition from its nonprofit structure to a public benefit corporation, which would require Microsoft’s approval.
The two companies have been negotiating for months but have yet to reach an agreement. OpenAI proposes revising the terms of Microsoft’s investment, including reducing its stake in exchange for giving up future profits. The company also seeks to modify existing clauses that grant Microsoft exclusive hosting rights.
The antitrust complaint would likely argue that Microsoft is using its dominant position and contractual leverage to suppress competition. This move could significantly alter their long-standing partnership, which has been a cornerstone of the AI industry.
Source: https://arstechnica.com/ai/2025/06/openai-weighs-nuclear-option-of-antitrust-complaint-against-microsoft