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What is "ChatGPT 4"? ChatGPT Plus can use GPT-4 and free ChatGPT uses gpt-3.5-turbo.

ChatGPT isn’t just using plain GPT-4, it’s using a specific pre-prompt and possibly additional fine-tuning (which I’m not sure about) compared to the plain GPT-4, available through API.

Someone saying ChatGPT4 is just saying in shorthand, the ChatGPT model based off GPT-4

There is also 100% some regex-style filtering logic which kills the output if it matches certain criteria.

It kicks in for famous book openings (e.g. tale of two cities), but only in English, regardless of what prompt you use to request it - so not part of the model at all but rather a filter on the output.

No idea if it's used for other purposes.

That is the moderation API, which you can actually block from the front-end (with javascript). Look up "ChatGPT DeMod."

Are you sure? I ran it by the moderation endpoint and both the partial output "It was the best of times," and the full thing give me e-06 or lower. This also doesn't give you any notification like other filters do.

I always forget how to see this stuff on the network tab of devtools since it's websocket obfuscated or such (befitting openai), but i have the feeling they're just killing the process directly on their end

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