OpenAI researchers said the new model was the company’s “best chat model yet,” citing an improved knowledge base and better contextual understanding.

The model underwent more training than any model before it and is said to feel more 'human' and possess a better general knowledge of the world.

When OpenAI started giving private demonstrations of its new GPT-4 technology in late 2022, its skills shocked even the most experienced A.I. researchers. It could answer questions, write poetry and generate computer code in ways that seemed far ahead of its time.