British antitrust regulators are seeking views on partnerships between Microsoft and Amazon with smaller generative AI model makers.

The U.K.’s Competition and Markets Authority on Wednesday said that it was opening invitations to comment for interested third parties to give their views on major AI partnerships between Microsoft and French AI firm Mistral and Amazon and U.S. startup Inflection, as well as Microsoft’s hiring of former employees from Inflection AI.

The CMA is attempting to investigate whether the arrangements between these companies qualify as mergers.

The invitation to comment is the first part of an information gathering process that comes ahead of the launch of a formal Phase 1 review by British regulators. An invitation to comment does not start the formal Phase 1 review, the CMA noted.

This breaking news story is being updated.