OpenAI is teasing a big announcement on Thursday, and based on a not-so-subtle clue, it seems like the news will be the reveal of its long-awaited GPT-5 AI model. In a post on X, OpenAI announced a “LIVE5TREAM THURSDAY 10AM PT” — notice that the “s” in the word livestream is swapped for a “5.”

A few recent signs have pointed toward an imminent release. On Sunday, CEO Sam Altman posted a screenshot with “ChatGPT 5” in the top-left corner, and the company’s head of applied research posted on Monday that he’s “excited to see how the public receives GPT-5!” And last month, Altman said that OpenAI planned to release GPT-5 “soon.” The Verge’s Tom Warren reported earlier this year that Microsoft has been readying server capacity for the new model, too.

The potential release of GPT-5 would add to an already big week for OpenAI, which announced GPT-OSS, a free open-weight model that can run on your laptop, on Tuesday.