Microsoft today said it will invest $1 billion in OpenAI, an artificial intelligence (AI) research startup co-founded by Elon Musk.

The two companies are also developing a hardware and software platform on Microsoft Azure that will train and run advanced AI models. Additionally, under the multi-year partnership, the companies will jointly develop new Azure AI supercomputing technologies.

And OpenAI said it’s all in on Azure, making Microsoft its exclusive cloud provider.

OpenAI started as a nonprofit research firm in 2015 to develop artificial general intelligence, which would essentially make machines as intelligent as humans. It set up a for-profit corporation earlier this year to seek additional outside investors.

Microsoft and OpenAI say the new partnership will seek to use artificial general intelligence to “work with people to help solve currently intractable multidisciplinary problems, including global challenges such as climate change, more personalized healthcare, and education.”

The OpenAI news follows recent Azure AI services that Microsoft rolled out at its annual Build developers’ conference in May — and several other high-profile partnerships.

Just last week Microsoft scored a deal with AT&T that Microsoft CEO Satya Nadella described as “one of the largest cloud commitments to date” and the “largest commercial deal that we’ve signed.” It’s reportedly valued at more than $2 billion.

In June Microsoft and Oracle set up a direct network link between their respective cloud platforms that allows enterprises to connect their workloads between the two cloud providers. And a month earlier Microsoft inked an agreement with SK Telecom to collaborate on 5G, AI, and cloud services to expand and promote the capabilities of IoT.