What’s new in GPT-5.1: All differences compared to GPT-5 explained

When OpenAI released GPT-5.1, it didn’t sound like much more than a routine update, another decimal in a sea of upgrades. But ...

I compared GPT-5.1 to GPT-5 on ChatGPT, and now I don’t want to go back

Testing GPT-5.1 against GPT-5 across multiple real-world prompts shows how small improvements in clarity, ...