If ChatGPT clearly hasn't sent many files, but still prompts that the limit has been reached, the problem is usually not just a limit hit, but rather a single file size, short-term upload frequency, the number of files in a project or GPT, or a certain layer in the total account storage.
Don't rush to repeat it over and over again. ChatGPT's file limits should be divided into at least four categories: single file limit, file type limit, scrolling frequency limit, and total storage at the account or organization level. For example, document files may be affected by the maximum token in addition to size. Tables and images also have their own single-file limits. You think you've only passed a few times, but previous failed attempts sometimes count towards the frequency cap.
The most practical troubleshooting sequence is as follows:
1. Try changing to a significantly smaller file to see if a single file is too large.
2. See if you have just sent a lot of attachments, project files, or GPT knowledge files in a short period of time.
3. If multiple chats, projects, and custom GPTs have all passed files, treat them as shared quotas rather than independently of each other.
4. Check the status.openai.com and troubleshoot the platform side upload fault.
If you encounter this problem in Projects, look at it one more layer: project file limits are not exactly the same as normal chat uploads, and the amount you can put on different subscription plans is different. Many people think that deleting the current chat attachment is enough, but what really takes up space may be the knowledge files that were stuffed into GPT or large files stored in other projects.
Another common misconception is to regard "upload times" as "actual storage". Sometimes you've deleted parts of a chat, but the related files or project assets may not immediately free up space the way you imagined. In addition, ChatGPT does not directly give you a clear "how much upload quota is left" panel, so the experience will be like a sudden pump of the system.
In this case, the most reliable solution is not blind testing, but active subtraction: first clean up the project files and GPT knowledge files that are no longer needed; Break down long PDFs into smaller sizes; Leave oversized forms only for the necessary sheets; Try to reuse files in one project for the same task, rather than repeating them everywhere. If you just want to ask a piece of content, it is often more stable to post key pages or key tables than to upload the entire package.
In a word, ChatGPT's "upload has reached the upper limit" is rarely just that you send too much this time, and it is more of a superposition of multiple levels of restrictions. Only by distinguishing which layer of the line is the collision can you really solve the problem.
