Amazon has redesigned Alexa to rely less on Anthropic models, part of a sweeping effort to lower the cost of running its AI-powered voice assistant, according to internal documents reviewed by Business Insider. The documents, which span late last year through early this year, show Amazon pursuing changes by routing more requests to its in-house AI models, avoiding unnecessary calls to Anthropic's Claude models, and squeezing more work from each GPU. The initiatives were expected to more than quadruple the number of customer transactions each unit of computing capacity could support. Internal forecasts from early this year showed AWS cloud costs for the upgraded, AI-powered Alexa+ were on pace to reach roughly $1.7 billion in 2026, nearly triple the previous year. Alexa+ was also projected to run about 60% above Amazon's target for AWS cloud cost per monthly active user. Even after identifying roughly $450 million in potential savings, internal reviews concluded the business would not hit its financial targets. Amazon declined to comment.