OpenAI is releasing GPT-5, its new flagship model, to all of its ChatGPT users and developers. GPT-5 is the first time that it really feels like talking to a PhD-level expert.”Despite ChatGPT now reaching nearly 700 million weekly users, OpenAI hasn’t had an industry-leading frontier model in a while. “I think that people are really going to feel that, especially average people who haven’t been spending their time thinking about models.”OpenAI is making GPT-5 available immediately to all ChatGPT users. For developers accessing GPT-5 via OpenAI’s API, the model will come in three flavors at different price points: GPT-5, GPT-5 mini, and GPT-5 nano. A big focus was “making sure the model doesn’t lie to users.” GPT-5 answers with fewer hallucinations than OpenAI’s o3 reasoning model, but confidently lying remains an inherent problem for large language models.