Google has decided to invest another billion into Anthropic, four sources told the Financial Times, bringing its total sunk cost to more than three billion dollars. Both companies have declined to comment.

The new tranche of money from Google into Anthropic adds to a total investment of $8bn from Amazon, the ecommerce group’s largest-ever venture investment, announced over the past 18 months. Amazon is also working to embed the Claude models into the next-generation version of its Alexa speaker.

The cash infusion comes on top of the $2 billion that Google has already provided to the artificial intelligence developer. Separately, Anthropic is said to be raising $2 billion from a group of institutional investors led by Lightspeed Venture Partners. The latter deal is expected to value the company at $60 billion.