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To fix the 400 status error due to exceeding the model's maximum context length, you need to reduce the length of your messages or functions. Here are some steps to achieve this:

• Segment the input: Break down the input into smaller chunks that fit within the model's token limit.

• Truncate data: Reduce the length of the messages or functions to ensure they do not exceed the maximum context length.

• Optimize prompts: Streamline your prompts and context to use fewer tokens.

• Use token counting tools: Utilize tools like TikToken to accurately count the tokens in your request and adjust accordingly.

• Implement rate limiting: Ensure you are not overwhelming the API with too many requests at once, which can also help in managing token limits.

By taking these steps, you can ensure your API requests comply with the model's context length limitations.