The ChatGPT file upload limit is 512 MB per document or presentation, 20 MB per image and about 50 MB per spreadsheet or CSV file, according to OpenAI’s Uploading files and audio to ChatGPT help article.
As of November 10, 2026, text and document files are also capped at 2 million tokens each, and audio files of up to 512 MB can be uploaded on paid plans only. You can upload up to 80 files every 3 hours, while Free users are limited to 3 file uploads per day, and OpenAI may lower these limits during peak hours. Upload storage is capped at 25 GB per user and 100 GB per organization.
Projects hold up to 5 files on Free, 25 on Go and Plus, and 40 on Edu, Pro, Business and Enterprise, and a custom GPT can hold 20 knowledge files. ChatGPT does not show how much of the rolling upload quota remains, and failed uploads can count toward it. The OpenAI API has separate limits.
Related: ChatGPT usage limits: how much can you use on each plan?, Is ChatGPT free? and What is the Claude file upload limit?
Source: OpenAI Help Center, Uploading files and audio to ChatGPT
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