What does the API error 400 mean when using OpenAI ChatGPT (GPT-3.5) and migrating to the GPT-3.5 API, specifically when receiving an unexpected response code for the URL https://api.openai.com/v1/chat/completions?

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The API error 400 means that the request made to the OpenAI ChatGPT (GPT-3.5) API was not properly formatted or includes invalid data. This error may occur when the request is missing required parameters or when the data provided does not match the expected format. It is possible that the unexpected response code for the URL https://api.openai.com/v1/chat/completi… is related to this error. To resolve the issue, check the API documentation for the correct request format and ensure that all required parameters are included in the request.