OpenAI launches groundbreaking o3 and o4-mini AI models that can manipulate and reason with images, representing a major advance in visual problem-solving and tool-using artificial intelligence.

OpenAI is releasing two new AI reasoning models today: o3, which the company calls its “most powerful reasoning model,” and o4-mini, which is a smaller and faster model that “achieves remarkable performance for its size and cost,” according to a blog post.

Following the recent launch of a new family of GPT-4.1 models, OpenAI released o3 and o4-mini on Wednesday, its latest addition to the existing line of reasoning models. The o3 model, previewed in December, is OpenAI's most advanced reasoning model to date, while o4-mini is a smaller, cheaper, and faster model.