OpenAI plans to secure further financial backing from its biggest investor Microsoft as the ChatGPT maker’s chief executive Sam Altman pushes ahead with his vision to create artificial general intelligence —computer software as intelligent as humans.

In an interview with the Financial Times, Altman said his company’s partnership with Microsoft’s chief executive Satya Nadella was “working really well” and that he expected “to raise a lot more over time” from the tech giant among other investors, to keep up with the punishing costs of building more sophisticated AI models.

Microsoft earlier this year invested $10 billion in OpenAI as part of a “multiyear” agreement that valued the San Francisco-based company at $29 billion, according to people familiar with the talks.