This week, OpenAI released its much-anticipated flagship model, GPT-5. We break down what we know about the upgrade, drawing from our initial testing and a special news briefing with Sam Altman. Then, we explain why we were underwhelmed by Amazon’s new Alexa+, which is powered by generative A.I., and take our feedback to Daniel Rausch, vice president of Alexa and Echo, who helps us understand why powering Alexa with L.L.M. capabilities is a major computer science challenge.Guests:Daniel Rausch, Amazon vice president of Echo and AlexaAdditional reading:OpenAI Aims to Stay Ahead of Rivals With New GPT-5 TechnologyAmazon Unveils Alexa+, Powered by Generative A.I.We want to hear from you. Email us at [email protected]. Find “Hard Fork” on YouTube and TikTok.Also, you can still get a special-edition “Hard Fork” hat! For a limited time, you’ll receive one when you purchase an annual New York Times Audio subscription for the first time (U.S. only). Go to nytimes.com/hardforkhat. Unlock full access to New York Times podcasts and explore everything from politics to pop culture. Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify.