Microsoft vs OpenAI and Anthropic: The AI War Intensifies

What Happened?

On Wednesday, July 29, 2026, Microsoft held a presentation for Wall Street showcasing its own internally developed artificial intelligence models, as well as new tools and a direct competitor to Mythos, Anthropic's platform. According to TechCrunch, the company communicated to investors its plan for continued growth based on these proprietary technologies. This announcement marks a turning point: Microsoft, which until now had been the primary investor and partner of OpenAI (with over $13 billion invested since 2019) and a collaborator with Anthropic, now positions itself as a direct competitor to both companies.

The presentation included a demonstration of large language models (LLMs) trained on Microsoft's proprietary data, as well as an AI assistant called Copilot Pro that integrates advanced reasoning capabilities. Additionally, a platform called TrustAI was revealed, directly competing with Anthropic's Mythos, focusing on AI safety and alignment. According to Bloomberg sources, Microsoft also announced a 30% price reduction on its Azure AI services to attract enterprise customers.

Why Is This Important?

Historically, Microsoft had integrated OpenAI's models into its products (Azure, Copilot, Bing) and maintained a symbiotic relationship. However, OpenAI's growing independence — seeking its own funding, developing its own hardware infrastructure, and launching models like GPT-5 in 2025 — along with Anthropic's rise with its focus on safety, have led Microsoft to diversify its strategy. As early as 2024, OpenAI began developing its own chips, which created tensions with Microsoft, according to reports from The Information.

Developing proprietary models allows Microsoft to reduce its dependence on third parties, control the entire value chain, and offer differentiated solutions to its enterprise customers. Moreover, direct competition could accelerate innovation and lower prices for end users. This move also responds to investor pressure, who sought a more autonomous strategy after OpenAI's IPO in 2025, which raised $50 billion.

Consequences for the Market

For OpenAI and Anthropic: They lose a key ally and gain a competitor with massive resources. OpenAI has already begun seeking new commercial partners, such as Oracle and Salesforce, and strengthening its own ecosystem through acquisitions of AI startups. Anthropic, meanwhile, sees its niche of safe and responsible AI threatened. According to Gartner analysts, Anthropic's market share in the enterprise segment could drop by 15% over the next 12 months.

For Enterprise Users: Greater model supply, but also fragmentation. Companies using Azure will need to decide whether to opt for Microsoft's models or those of its partners. Interoperability could be affected, as Microsoft's models may not be compatible with OpenAI and Anthropic's APIs. However, the 30% price reduction announced by Microsoft could trigger a price war in the sector, benefiting customers in the short term.

For the Industry: The race for AI hegemony intensifies. Google, Meta, and other tech companies are also investing heavily. Google, for example, has launched its Gemini 2.0 model and integrated AI into all its products. Meta has open-sourced its LLaMA models, fostering a developer community. Government regulation could accelerate amid power concentration, especially in the European Union, which has already proposed the AI Act with transparency and safety requirements.

What Should Readers Know?

• Microsoft is not only competing with models but also offering development tools and deployment platforms that directly compete with those of OpenAI and Anthropic. For instance, its Azure AI Foundry platform allows developers to create and deploy their own models, similar to what Anthropic offers with its platform.
• The presentation included a competitor to Mythos, called TrustAI, focusing on safety and responsibility. TrustAI includes auditing and alignment tools that allow companies to verify model behavior, something Anthropic had positioned as its main competitive advantage.
• This move could redefine the Microsoft-OpenAI alliance, which had already shown signs of tension since 2024 when OpenAI began developing its own hardware. According to The Wall Street Journal, Microsoft has reduced its investment in OpenAI by 40% in the last quarter.
• Investors reacted positively: Microsoft's stock rose 2% following the announcement, according to Bloomberg data. In contrast, OpenAI's stock (which is publicly traded) fell 5% on the same day, and Anthropic (which is private) saw a 10% reduction in its market valuation according to PitchBook estimates.
• The enterprise AI market, valued at $150 billion in 2026, could experience significant reconfiguration. According to IDC, Microsoft could capture up to 30% of this market over the next three years, while OpenAI and Anthropic would see their shares reduced to 25% and 10%, respectively.

"Microsoft is doing what any smart company would do: not putting all its eggs in one basket," commented Sarah Guo, partner at Conviction Capital, in statements to TechCrunch. "But in doing so, it is changing the rules of the game for the entire AI ecosystem. The question is whether its former partners can survive without its support."

In conclusion, Microsoft's decision to openly compete with its former partners marks a new era in the AI industry. Companies and developers must prepare for a more fragmented but also more competitive market, where innovation and price will be the main differentiators. The AI war has just begun, and Microsoft has fired the first missile.