Here's what OpenAI had to say about the GPT-4o, its newest model.

The most recent multimodal AI model from OpenAI, GPT-4o, has been released and will be given up to users without charge. The model's capacity to receive any combination of text, audio, and image input and produce any combination of text, audio, and image outputs makes it unique. Although it is "much faster and improves on its capabilities across text, voice, and vision," OpenAI asserts that it possesses intelligence comparable to GPT-4. Additionally, OpenAI asserts that the time it takes for voice responses is comparable to that of humans.