GPT-5 might be just a few days or weeks away, as we've spotted references to a new model called gpt-5-reasoning-alpha-2025-07 ...

If you're looking for a guide on which model to use and when, you're in the right place. GPT-4 and GPT-4o OpenAI first released GPT-4 in 2023 as its flagship large language model.

If you have been using Bing Chat for the past five weeks, you will be happy to hear that you have been using OpenAI's most advanced language model, GPT-4, which was just unveiled this week.