ChatGPT does indeed have a limit on the length of responses it can generate. The current maximum length for a single response from ChatGPT is set at 2048 tokens. This limit is in place to ensure that the model can generate responses in a timely manner while maintaining the quality and coherence of the output.
It is important to note that 2048 tokens is actually quite a generous limit compared to other text generation models. In most cases, this should be more than enough to generate a detailed and comprehensive response to a given prompt.
However, if you find that you need to generate longer responses, there are ways to work around this limit. One common approach is to split your input prompt into smaller segments and generate responses for each segment independently. You can then concatenate these individual responses to form a longer overall answer.