Two, it’s better. So far, Microsoft had bet almost exclusively on Openai, which has put a lot of balls in the start-up (more than 13 billion dollars injected since 2019). Copilot’s success in Word, Excel or Outlook is based on GPT models. But Redmond’s company is now taking a step aside. According to the site The InformationMicrosoft has signed an agreement to use anthropic technology, and especially the Claude Sonnet 4 model.
The opening to Claude Sonnet 4
Microsoft engineers consider this model particularly efficient on certain specific tasks: the automated creation of PowerPoint presentations ” more aesthetic Or the automation of complex financial calculations in Excel. A way for the publisher to offer an enriched experience, without changing the Price of tools already invoiced to companies and individuals.
To access Claude, Microsoft will nevertheless have to go through Amazon Web Services (AWS), a major anthropic shareholder. A paradox, since Microsoft is also in front of AWS on the cloud market! But this detour highlights the importance, for the company of Satya Nadella, of integrating the best models available, even if it involves dealing with its direct rivals.
Despite this turn, Microsoft wishes to reassure: ” Openai remains our partner on advanced models and we remain engaged in the long term “Recalled a spokesperson. The publisher is in full renegotiation with OPENAI, while the start-up explores a restructuring towards a more lucrative model and is close to a potential IPO which promises to be explosive.
This extended partnership also reflects a more tense context. Openai develops its own infrastructure, wants to produce its own chips with Broadcom in 2026 and gradually emancipates from dependence in Azure. For its part, Microsoft multiplies independence signals: launch of its own homemade models (Mai-Voice-1 and Mai-1-Preview), integration of competing solutions like Grok (XAI) and Claude in Github Copilot, or the deployment of an automatic selection function of the “best model” for developers.
The arrival of Anthropic in Office 365 therefore does not sign the end of the Microsoft-Oopenai alliance, but the era of exclusivity seems to be over. It must be said that demand is exponential, and while the quality of the models varies according to uses, the multi-candor approach could become the norm. And Microsoft is already placed in this logic, by multiplying the options without losing sight of its own models.
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