It is my understanding that Bing Chat uses a customized version of gpt 4. It has obvious limitations but even it is scarily useful. I have it give me examples of how to use different APIs frequently and more often than not it is correct and more concise than anything I find with traditional searching.

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Not the same as full GPT 4 and doesn't mitigate the concern of gating access to such a revolutionary technology but at least it is something for anyone out there who may be feeling left behind.