Microsoft will start integrating the artificial intelligence technology of Anthropic in Office 365 applications. The relocation is an indicator of a wider approach by the software giant to expand its AI portfolio, even though it still operates with OpenAI. Those developers who took part in the work stated that the models of Anthropic are more effective at doing Office tasks than those of OpenAI, providing users with better results. This company will formally declare the integration in the next few weeks without varying the cost of Office AI tools.
Microsoft expands AI Portfolio
Microsoft has been using OpenAI models to drive AI functionality in Word, Excel, Outlook and PowerPoint over the years. Having been involved earlier in the development of the frontier models, the company has invested over $13 billion into OpenAI, which has put it at the forefront of the AI race. One of the Microsoft representatives restated that OpenAI will be a key collaborator in the further development of models. Microsoft, however, is also investing in its own AI research and incorporating the technology of Anthropic to increase its abilities.
Anthropic Models perform best in office features
The report asserted that developers who developed Office AI saw that the latest Claude models in Anthropic are better than OpenAI in some tasks. These involved automation of finances within the Excel spreadsheet and creation of PowerPoint presentations according to the instructions of the user. Whereas OpenAI recently introduced GPT-5, Claude Sonnet 4 by Anthropic was reportedly more capable of generating more aesthetically sophisticated PowerPoint slides. The discrepancy in performance prompted Microsoft to use the models of Anthropic in its productivity package.
AWS Provides Infrastructure to Anthropic Access
According to the Information, Microsoft is paying Amazon Web Services (AWS) to use the models of Anthropic. Anthropic has a large interest in AWs and helps it to operate its systems on scale. Neither Anthropic nor OpenAI responded to the Reuters inquiry on the issue. AWS also refused to make any statement.
The fact that Microsoft uses AWS in order to implement the Anthropic integration underscores the intricacy of partnership in the competitive world of AI. Although Microsoft Azure is the main cloud server of the company, leveraging competitor infrastructure will enable it to extract AI at its fullest potential to support the increasing international demand. Simultaneously, the action highlights that Microsoft is inclined to strike the right balance of competition and cooperation throughout the industry to speed up product development.
There is no change to the Office 365 AI Pricing
Implementation of Anthropic technology to Office 365 will not be added to the subscription charge of users, according to the report. Microsoft will maintain a constant price of AI-enabled Office capabilities even as it integrates various models by other vendors. This move demonstrates the way the company plans to increase the performance of the products without changing the customer prices.
Integrating the models of Anthropic, OpenAI and DeepSeek into the offer of Microsoft is now part of its roadmap, which also continues its internal development of AI. The integration is supposed to produce a versatile ecosystem that has the ability to provide better business and personal user tools. With the growing pace of AI implementation, the company seems to be interested in the creation of a multi-model approach to provide independence and market competitiveness.
The industry analysts observed that the move by Microsoft to Anthropic does not indicate that it is leaving OpenAI. Rather, it is an indication of the increased awareness that all AI requirements cannot be satisfied by one provider. The combination of technologies developed by various developers will allow Microsoft to enhance the performance of all Office applications and be ready to use the future advances of generative AI.
