Is Bing using GPT&4?

At the time of my knowledge in September 2021, GPT-4 had not yet been released by OpenAI and there were no official announcements about its development or release. ..

Is Bing using GPT&4?
At the time of my knowledge in September 2021, GPT-4 had not yet been released by OpenAI and there were no official announcements about its development or release. ..

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