Alphabet Inc.’s Google is backing artificial intelligence developer Anthropic with a further $1 billion, building its stake in one of the most promising rivals to OpenAI.

Google is making a fresh investment of more than $1 billion into OpenAI rival Anthropic, the Financial Times reported on Wednesday.

The new tranche of money from Google into Anthropic adds to a total investment of $8 billion 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.

Google LLC, a division of Alphabet Inc., (GOOG) (GOOGL) has announced spending an additional $1 billion on the artificial intelligence startup Anthropic, a significant OpenAI competitor,