OpenAI's latest flagship model is GPT-4o (where "o" stands for "omni"), which was announced in May 2024. GPT-4o is a multimodal model that can process and generate text, images, and audio. It offers improved performance over GPT-4, with faster response times and enhanced capabilities across different modalities.

There's also GPT-4o mini, a smaller, more cost-effective version that was released in July 2024 to replace GPT-3.5 Turbo.

Please note that OpenAI frequently updates their models, so there may be newer releases that I'm not aware of if they've occurred after my last training data update.
