As reported, Microsoft has invested in Mistral AI, a European artificial intelligence startup, prompting a comprehensive review by EU antitrust regulators. The partnership primarily involves Microsoft providing computing power to Mistral AI and listing its large models on Microsoft's cloud computing services. This move could lead to a formal investigation by the EU into Microsoft's investment. Microsoft's investment in Mistral AI amounts to approximately €15 million, which is particularly noteworthy against the backdrop of Microsoft, a major shareholder of OpenAI, striving to expand its AI application domain. Mistral AI's developed AI models have performed exceptionally well in common benchmark tests, ranking second globally, just behind OpenAI's GPT-4 model.