Why Is ChatGPT So Slow? 6 Fixes That Usually Work

When ChatGPT crawls, it's tempting to assume OpenAI's servers are struggling. Sometimes that's true. But just as often the cause is on your side: a chat that's grown huge, stale data in your browser, or an extension quietly interfering. The good news is that each of these takes a minute to rule out, so work through them in order.

Quick fixes in order

Check	Why it helps
status.openai.com	Shows whether OpenAI is having a slowdown or outage
Start a new chat	Very long conversations slow responses down
Refresh or restart the app	Clears a stuck session
Clear cache and cookies for the site	Old stored data is a common cause of sudden slowness
Private window, extensions off	Shows whether an extension is the problem
Turn off your VPN or try another network	VPNs and blockers can stall the page

1. Check whether it's OpenAI, not you

Open status.openai.com. OpenAI posts incidents there, including ones titled 'ChatGPT response times slower than normal'. If there's a live incident, there's nothing to fix on your end: wait, or switch to a different task for a while. If everything's green, the problem is more likely local.

2. Start a new chat

This is the fix people overlook. OpenAI's own advice for lagging or freezing sessions is to start a new chat if you're in a long conversation. Every reply in a long chat has to take the whole conversation into account, and the page itself gets heavy with hundreds of messages. If you need context from the old chat, ask ChatGPT to summarise it, then paste the summary into a fresh one.

3. Clear the cache and cookies

OpenAI says that if ChatGPT was working normally and is suddenly slow, outdated cache data is the most common reason. Clear the cache and cookies for the ChatGPT site in your browser settings, then sign in again. You don't need to clear your whole browser history, just the data for that site.

4. Try a private window with extensions off

Open ChatGPT in an incognito or private window, where most extensions don't run. If it's fast there, one of your extensions is the culprit. Ad blockers, script blockers, grammar tools and page translators are the usual suspects. Switch them off one at a time in a normal window to find which.

5. Check your connection, VPN and network

VPNs, proxies and security tools can slow ChatGPT or stop answers loading partway. Turn off your VPN briefly, or try your phone's mobile data instead of office wifi. If it's quick on another network or device, the slowdown is your connection or network settings, not ChatGPT.

Why some answers take longer than others

• Long answers take longer. Asking for a long report will always be slower than a short reply. Ask for a shorter answer if speed matters.
• Reasoning models think first. Models designed to work through problems step by step pause before answering. That's by design, not a fault.
• Tools add time. Searching the web, analysing a file or creating an image all take longer than a plain text reply.
• Busy times. When demand is high, OpenAI sometimes reports slower response times on its status page.

If it's still slow

1. Try a different browser, or the ChatGPT desktop or mobile app.
2. Sign out and back in.
3. Wait a minute, then use Stop generating and try again.
4. Contact OpenAI support from the help centre, saying which browser, device and model you were using.

Getting faster answers day to day

• Ask for the format you want up front, such as 'five bullet points', so there's less to generate.
• Start a new chat for each new topic rather than keeping one endless conversation.
• Use a quicker model for simple jobs and save heavy reasoning for problems that need it.
• Keep files small: upload the pages you need, not a whole report.

Slow on the phone app?

On a phone, the usual causes are a weak signal, a power-saving mode that slows background data, or an app that's out of date. Update the ChatGPT app, switch between wifi and mobile data to see which is quicker, and close and reopen the app if a reply seems stuck. Very long chats slow the app down just as they do the website, so a fresh chat helps here too.

Is it ChatGPT or your computer?

If every website feels sluggish, not just ChatGPT, the slowdown is your device or internet connection. Close a few tabs, especially other web apps, and restart the browser. A computer that's been running for days with dozens of tabs open will make any AI chat feel slow. If ChatGPT is the only slow site, the steps above will usually find the cause.

If you hit the limits of one AI assistant often, my comparison of Grok and ChatGPT looks at the alternatives, and my explainer on context windows shows why long chats get slower.

My verdict

Start with status.openai.com. If nothing's reported, start a new chat, because long conversations are the most common hidden cause, then clear the site's cache and cookies and test a private window without extensions. Ask for shorter answers when speed matters, and expect reasoning models and web searches to take longer. For using AI tools at work more efficiently, see how to use ChatGPT for business development.

Frequently asked questions

Why is ChatGPT so slow today?

Check status.openai.com for a slowdown. If nothing's reported, start a new chat and clear the site's cache.

Do long chats make ChatGPT slower?

Yes. OpenAI suggests starting a new chat if a long conversation is lagging.

Can browser extensions slow down ChatGPT?

Yes. Test in a private window with extensions off to check.

Does a VPN slow ChatGPT down?

It can. Turn the VPN off briefly or try another network.

Why do some ChatGPT models take longer to answer?

Reasoning models work through problems before replying, which takes extra time.

Is the ChatGPT app faster than the website?

Sometimes. If the browser is slow, try the desktop or mobile app to compare.