The engine behind ChatGPT has long been expected to get a revamp. Close followers of OpenAI's model releases are probably tired of hearing about GPT-5, the next big step in the company's line of flagship large language models. It's been expected seemingly all year. But the hints are getting very strong.

Details about OpenAI's upcoming model GPT-5 have leaked, revealing better abilities to reason and improved agentic browsing.

GitHub has accidentally announced OpenAI’s new range of GPT-5 models. A now-deleted GitHub blog post reveals that GPT-5, which will be available in four different versions, offers “major improvements in reasoning, code quality, and user experience.”