Seems like new OpenAI models leave invisible watermarks in the generated text

OpenAI Admits Newer Models Hallucinate Even More

Top OpenAI Catastrophic Risk Official Steps Down Abruptly

OpenAI Pioneers Program

An OpenAI researcher who worked on GPT-4.5 had their green card denied

OpenAI Puzzled as New Models Show Rising Hallucination Rates

OpenAI is building a social network?

OpenAI's new reasoning AI models hallucinate more

OpenAI’s o3 AI model scores lower on a benchmark than the company initially implied

ChatGPT head tells court OpenAI is interested in buying Chrome