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Microsoft Adds Anthropic AI Models to 365 Copilot, Expanding Beyond OpenAI

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Microsoft announced on Wednesday that it is integrating Anthropic’s AI models into its Copilot assistant, marking a strategic move to diversify beyond its close partnership with OpenAI, the maker of ChatGPT.

While OpenAI’s models will continue to power Copilot by default, users will now be able to choose Anthropic’s Claude Sonnet 4 and Claude Opus 4.1 for tasks within Copilot’s “Researcher” tool and when building custom agents in Microsoft Copilot Studio.

Starting this week, users who opt in to test Claude will be able to switch seamlessly between OpenAI and Anthropic models in Researcher, said Charles Lamanna, president of Microsoft’s business and industry Copilot division.

The shift underscores Microsoft’s effort to broaden the foundation of its AI services. Until now, Copilot’s advanced features across apps such as Word and Outlook have relied primarily on OpenAI.

Although Microsoft is OpenAI’s largest investor, the company has also been developing its own models and integrating those from other AI firms. Earlier this year, it announced plans to offer models from Elon Musk’s xAI and Meta Platforms, all hosted within its data centers. Models from China’s DeepSeek have also been added to Microsoft’s Azure cloud platform.

Anthropic’s Claude models, however, are primarily hosted on Amazon Web Services (AWS), a direct competitor to Microsoft Azure, highlighting a rare cross-cloud collaboration.

Anthropic Reaches $1.5B Settlement With Authors Over AI Training

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Anthropic has agreed to pay $1.5 billion to settle a class-action lawsuit from authors who accused the company of using pirated books to train its AI chatbot Claude, according to a filing in San Francisco federal court on Friday. The settlement, which still requires judicial approval, is being described by plaintiffs as the largest copyright recovery in history and the first major resolution of its kind in the AI era.

Under the deal, Anthropic will destroy downloaded copies of more than 7 million pirated books stored in a central library and establish a $1.5 billion fund—equivalent to about $3,000 per 500,000 downloaded works, though the amount could rise if more books are identified. While the settlement ends claims over the copying of works for training, it leaves open potential future lawsuits regarding AI-generated outputs.

The lawsuit, filed last year by authors including Andrea Bartz, Charles Graeber, and Kirk Wallace Johnson, alleged that Anthropic—backed by Amazon and Alphabet—unlawfully scraped millions of books from pirate sites to build Claude’s training dataset.

Judge William Alsup previously ruled that Anthropic’s use of the works for model training qualified as fair use, but storing the pirated material in a central database violated copyright law. A trial scheduled for December could have exposed Anthropic to damages in the hundreds of billions of dollars.

Author advocates hailed the agreement. The Authors Guild’s CEO, Mary Rasenberger, called it “a vital step in acknowledging that AI companies cannot simply steal authors’ creative work to build their AI.”

The case is a watershed moment in the ongoing legal battles between AI developers and copyright holders, with other high-profile cases against OpenAI, Microsoft, and Meta still pending. Courts remain divided on whether training AI on copyrighted content constitutes fair use, ensuring the debate is far from over.

European AI Adopter Stocks Slide as Powerful New Models Spark Investor Caution

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Shares of European companies investing heavily in artificial intelligence have faced a sharp selloff this week, as the emergence of more advanced AI models raises concerns about potential disruption across software, data analytics, and financial services sectors.

European software stocks, including Germany’s SAP (SAPG.DE) and France’s Dassault Systèmes (DAST.PA), fell sharply on Tuesday following a downgrade of U.S. rival Adobe (ADBE.O) by broker Melius Research. Since mid-July, shares in London Stock Exchange Group (LSEG.L), UK software firm Sage (SGE.L), and French IT consulting company Capgemini (CAPP.PA) have dropped 14.4%, 10.8%, and 12.3%, respectively.

These companies—often labeled AI adopters—have invested heavily in AI to enhance products and services, attracting investor interest amid a shortage of European AI suppliers. However, the release of more powerful AI models, such as OpenAI’s GPT-5 and Anthropic’s Claude for Financial Services, has prompted a reassessment of their long-term competitiveness. Kunal Kothari of Aviva Investors noted that each new AI iteration challenges the business models of data providers like LSEG.

While the broader European markets have posted modest gains—FTSE 100 up 2.5% and STOXX 600 up 0.6% since mid-July—high valuations have made AI adopter stocks particularly vulnerable. SAP trades at around 45 times earnings, compared with a STOXX 600 average of 17.

Investors are debating whether AI will “eat software,” as Nvidia CEO Jensen Huang famously predicted. Analysts caution that not all software companies are equally exposed. Firms with deeply embedded enterprise applications or proprietary data may retain a competitive edge. For example, UK credit data company Experian (EXPN.L) and Sage benefit from extensive integration into client workflows, making them less vulnerable to disruption.

Some experts view the selloff as a buying opportunity, noting that affected companies could leverage AI to boost earnings over time. However, market watchers warn that proving tangible returns from AI investments may be a race against the clock for major European software players.