OpenAI reboots ChatGPT experience with GPT-5.1 after mixed reviews of GPT-5

Court rules that OpenAI violated German copyright law; orders it to pay damages

OpenAI's GPT-5.1 makes ChatGPT 'warmer' and smarter - how its upgraded modes work now

OpenAI Can’t Fix Sora’s Copyright Infringement Problem Because It Was Built With Stolen Content