Reviewed guide · September 1, 2026

ChatGPT file upload limits: every official number

File uploads are one of the few ChatGPT limits OpenAI publishes exactly. This page lists them all from the official file uploads FAQ, explains which one usually causes a failed upload, and shows how to work around each without breaking anything.

Reviewed: September 1, 2026. Figures marked official come from OpenAI’s help center; everything else is labelled as observed or approximate.

What is still limited?Open ChatGPT

Important: OpenAI changes plan rules, model names and allowances without notice. The message and reset time inside ChatGPT is the only number that is definitely yours.

The numbers

Official limits from OpenAI’s file uploads FAQ.

Limit	Value	Applies to
Per-file size	512 MB	All files, all plans
Text and document tokens	2,000,000 tokens per file	PDF, DOCX, TXT and similar
Spreadsheets	About 50 MB	CSV, XLSX
Images	20 MB per image	All plans
Rolling upload cap	80 files every 3 hours	All plans
Free daily cap	3 uploads per day	Free
Files per project	20 (Plus) / 40 (Pro, Business, Education)	Projects
Files per custom GPT	10 for the lifetime of the GPT	GPT builders
Storage	25 GB per user, 100 GB per organisation	All
Retention after deletion	Removed within 30 days	All, with security/legal exceptions

Diagnose

Which cap stopped your upload.

Symptom	Likely cap	Fix
Large PDF rejected	2M tokens or 512 MB	Split by chapter; export text only
Spreadsheet rejected at 60 MB	~50 MB spreadsheet cap	Remove unused sheets, export CSV, filter rows first
Third upload of the day fails on Free	3 per day	Paste the text; the chat itself is unlimited
Uploads fail after a busy session	80 per 3 hours	Wait for the window; attach files to a project instead of re-uploading
Project will not take another file	20 or 40 files per project	Merge documents or archive old ones
Image rejected	20 MB per image	Compress or resize

Work smarter

Fewer uploads, better answers.

Projects, not re-uploads

Attach reference files once; every chat in the project can use them.

Paste the relevant part

For a question about one section, paste it. Unlimited text beats a capped upload.

Trim spreadsheets

Filter to the columns and rows that matter before uploading.

Name what you want

“Summarise sections 3–5 and list every date” gets a better answer than “analyse this” and needs fewer follow-ups.

Alternatives

What to use when uploads are capped.

If a cap lands mid-task and you cannot wait for the reset, the practical fix is a second tool. None of these are affiliated with OpenAI; pick whichever fits the job.

Alternative

Claude

claude.ai

Strong writing, analysis and long documents. Has its own five-hour and weekly limits.

Alternative

Gemini

gemini.google.com

Best inside Google Workspace and for Google-context tasks.

Research

Perplexity

perplexity.ai

Research answers with web sources and citations.

Alternative

Copilot

copilot.microsoft.com

Useful inside Microsoft 365 and Windows.

Multi-model

MultipleChat

multiplechat.ai

Several models in one workspace so one provider’s cap does not end your day.

Disclosure: MultipleChat is built by the team that runs this site. It is listed as one option among several; nothing on this page is paid placement.

Official sources

Where to verify the current rule.

Checked September 1, 2026. OpenAI changes plan rules without notice; these pages and your own in-app counter are authoritative.

OpenAI Help: File uploads FAQ

Per-file size, files per project, rolling upload cap, Free daily cap and storage limits.

OpenAI Help: GPT-5.6 in ChatGPT

Which reasoning options each plan gets, unlimited text on Free and Go, and what happens at a reasoning limit.

ChatGPT pricing

Current plan names, prices and what each tier includes.

FAQ

File upload limit questions answered.

What is the ChatGPT file upload size limit?

512 MB per file, hard limit on every plan. Text and document files are also capped at 2 million tokens, spreadsheets at about 50 MB, and images at 20 MB (OpenAI’s file uploads FAQ).

How many files can I upload?

Up to 80 files every three hours on all plans. Free accounts are limited to three uploads per day. Projects hold 20 files on Plus and 40 on Pro, Business and Education; a custom GPT holds 10 files for its lifetime.

Is there a storage limit?

25 GB per user and 100 GB per organisation.

How long are uploaded files kept?

Files are deleted within 30 days after you delete the chat, custom GPT or account, with exceptions for security or legal reasons. Advanced Data Analysis retention varies by plan.

Why did a small file fail?

Usually the token cap (a long text file can exceed 2 million tokens well under 512 MB), the spreadsheet cap, a Free daily cap, or the three-hour rolling cap. Split the file or paste the relevant part.

Do uploads use my message limit?

Text chat is unlimited, so no. Uploads have their own caps listed here, and analysing a file with extended reasoning uses the reasoning allowance.