ChatGPT leverages GPT-3.5 as the underlying model, while it uses an additional layer, a model called InstructGPT, which has become a standard within the OpenAI large language models. InstructGPT optimizes conversational abilities and improves on top of the existing GPT models.
ChatGPT is a conversational interface that leverages two main models:
- GPT: generative pre-trained model.
- And InstructGPT: an additional layer on top of GPT to transform the classical GPT model into a conversational interface while making it more prone to tackle these conversations.


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