ChatGPT-4o contains latest improvements for chat use cases, expected for testing/evaluation purpose.

ChatGPT-4o also supports structured outputs, with up to 16k max output tokens

GPT-4o ("o" for "omni") is OpenAI's latest AI model, supporting both text and image inputs with text outputs. It maintains the intelligence level of GPT-4 Turbo while being twice as fast and 50% more cost-effective. GPT-4o also offers improved performance in processing non-English languages and enhanced visual capabilities.