Alphabet Inc. (Alphabet (GOOG), Alphabet (GOOGL)) shares were up about 1% in Tuesday's after-hours trading after a report from The Information said Anthropic committed to spend $200 billion with Google Cloud over five years as part of a recent agreement.

The move suggests investors are reading the deal as a major validation point for Alphabet's cloud and AI infrastructure strategy, particularly as Anthropic's commitment reportedly includes spending tied to Google's cloud services and chips.

According to the report, Anthropic may account for more than 40% of the revenue backlog Alphabet disclosed to investors last week, highlighting the scale of AI-related cloud demand already contracted at Alphabet.

According to Reuters, the report also said Anthropic and OpenAI contracts now represent more than half of the $2 trillion in backlogs at major cloud providers, underscoring how aggressively leading AI labs are locking up compute capacity.

For Alphabet, the news could ease concerns that Google Cloud is trailing Amazon.com (AMZN) and Microsoft Corp. (MSFT) in AI infrastructure demand, while reinforcing the long-term revenue opportunity from large language model developers.

Reuters noted it could not immediately verify the report, and Anthropic and Google did not respond to requests for comment.

GOOGL Price Action: Alphabet stock was up 1.35% during regular trading and up 1.40% in after-hours trading on Tuesday, last trading at $393.86. The stock is trading at a new 52-week high, according to market data.