Skip to content

Free ChatGPT 4, now upgraded to GPT-5

Free ChatGPT 4 online, now running GPT-5
Looking for free ChatGPT 4? On Yiaho it now runs GPT-5, online and with no usage limit.

ChatGPT-4 online for free? Use its successor, GPT-5

Looking for ChatGPT 4 online for free? On Yiaho, the chatbot above has been upgraded to GPT-5, OpenAI’s newer model. It’s still free, still unlimited, and you still don’t need an account.

Just type your question in the chat box at the top of the page. You’ll get the same kind of help people came to GPT-4 for (writing, explanations, translations, coding, ideas) from a newer, faster model.

What happened to GPT-4?

OpenAI released GPT-4 in March 2023, and for a long time it was the model everyone wanted to try. It has since been retired from ChatGPT and replaced by newer models: GPT-5 arrived in August 2025, and the GPT-6 family followed in September 2026. Offering GPT-4 today would mean giving you an older, weaker model, so we moved this page to GPT-5 instead.

GPT-4 vs GPT-5: what changes for you

  • More recent knowledge: GPT-5 was trained on much more recent data than the original GPT-4.
  • Faster replies: answers start appearing almost instantly, even on a phone.
  • Still maintained: GPT-4 is retired, while GPT-5 is a current OpenAI model.
  • Same simple use: you chat with it exactly as you would with ChatGPT-4.

In short, if you were searching for “ChatGPT 4 free”, you’re getting a newer model, with the same ease of use.

How to use free ChatGPT on Yiaho

  1. Type your question or request in the chat box above.
  2. Read the answer, then keep going: ask for changes, details or a different format.
  3. That’s it. No sign-up, no credit card, no download.

It works in any browser, on a computer, tablet or phone. There’s no daily message cap, so you can come back as often as you like.

Is ChatGPT 4 free?

On OpenAI’s side, access to its models comes with usage limits on the free plan, and the most powerful models are part of paid subscriptions. On Yiaho, the chatbot on this page is free and unlimited: we use OpenAI’s official API and fund the service with advertising. Yiaho is independent and isn’t affiliated with OpenAI.

Can I download ChatGPT 4?

There’s nothing to download here: the chatbot runs in your browser. Be careful with websites offering a “ChatGPT 4 download” for your computer: OpenAI’s only official apps are on its own website and the official app stores, and unofficial installers can contain malware.

What else can you try?

Good to know

Like any AI, GPT-5 can make mistakes, so check important facts and figures. The chatbot doesn’t browse the web, so it won’t know about very recent events. Don’t share personal or confidential information, and for health, legal or money questions, see a professional.