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No. OpenAI haven't disclosed parameter count of GPT-3.5 or GPT-4, which are models used by ChatGPT. You may be thinking of GPT-3, which is indeed a 175B parameter model.

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Ah, interesting. Thought GPT-3.5 had the same structure as GPT-3, for some reason. GPT-4 would obviously be different.

GPT-3.5 is likely a finetuned Curie 13B using output from the full size GPT-3 175B.

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