ChatGPT-4 models have come on leaps and bounds since the original ChatGPT-4 was released, particularly with the new o3 and o4-mini models, and the Deep Research agent. While ChatGPT-3.5 (released in November 2022) showed us the potential for what an AI chatbot could be, it was ChatGPT-4 (released in March 2023) that really demonstrated what was going to be possible in the future. ChatGPT-4 was introduced at the same time as the new paid-for Plus subscription service from OpenAI, marking the first time that ChatGPT became a consumer product that people had to pay to access in a web browser.OpenAI officially retired the ChatGPT-4 model at the end of April. It has now been replaced entirely by newer models like o3, o4-mini, and ChatGPT-4.5 inside the ChatGPT model picker. What is your experience with ChatGPT-4?
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