ChatGPT 4: What Happened and What Replaced It
GPT-4 disappeared from ChatGPT, but the name stuck. Here's what happened to it, whether you lost something good, and which model to choose today.
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GPT-4 was the model that convinced the world in 2023 that this tool was a game-changer. Today, when someone searches for “ChatGPT 4,” they usually want to know one of three things: does this model still exist, is it free, and are newer versions better. We’ll answer all three, because the situation is different from what older guides floating around the web suggest.
What Happened to GPT-4
GPT-4 launched in March 2023 and for a long time was only available in the paid plan. Then came newer versions: faster, cheaper, and better at nearly every task. After a while, the original GPT-4 disappeared from the model list in ChatGPT, because maintaining an older, more expensive, and weaker model alongside newer ones stopped making sense. The name stuck in people’s minds, though, which is why it’s still one of the most common search queries.
In practice, this means you’re not choosing between GPT-4 and a newer model today. You’re choosing between models from the current lineup, described in our guide to ChatGPT 5 versions, and we track the latest pricing and context windows in our AI model ranking.
Does This Mean You Lost Access to Something Good
No. Newer models are better than GPT-4 at things that matter most in daily work: longer context, more accurate output, less hallucination, and working with files and images. They’re also cheaper through the API, which makes a huge difference for production work.
The only thing some people miss is the style. GPT-4 wrote differently: more verbose, but also more “literary.” If that’s what you’re after, the solution isn’t an old model, but clear style instructions, which we cover in our guide on how to write prompts.
Can You Still Use It
Older models sometimes stay available in the API longer than in the app itself, but even there they get deprecated, and providers announce this in advance. If you’re building something on a specific model version, check the documentation for how long it’s supported and plan your migration early. This is actually a general rule for working with these tools: the model you’ve built your process on will eventually disappear.
Timeline: From GPT-4 to GPT-6 Astra
To understand why “ChatGPT 4” is now a historical name, you just need to look at the dates. We checked them in OpenAI’s announcements and our earlier articles.
| Date | What Happened | What It Means for You |
|---|---|---|
| March 14, 2023 | GPT-4 launch, Plus plan only | this model started the “GPT-4” trend |
| May 2024 | GPT-4o becomes default model, including free plan | “o” means omni: text, image, and voice in one model |
| April 30, 2025 | OpenAI removes original GPT-4 from ChatGPT | from this day you can’t select it in the chat window |
| August 2025 | GPT-5 launches in ChatGPT | older models disappear from the list for most accounts |
| 2026 | GPT-5.6 family (Sol, Terra, Luna), and GPT-6 Astra on September 3, 2026 | free plan gets GPT-5.6 Luna, Astra is in paid plans |
How to Enable GPT-4 Today
You can’t in ChatGPT. The model menu only contains the current family, and OpenAI removes older versions without a “pin” option. If someone at a company still has a switch with older names, that’s an admin setting in a business plan, not a feature for individual users.
Outside the chat interface, the situation is different. Models from the GPT-4 family (GPT-4o, GPT-4.1) were still available through the API in 2025, meaning for developers paying per token. Whether a given identifier works on the day you’re reading this, check the model list in OpenAI’s developer dashboard - that list changes every few months and we don’t want to write down a state that will be outdated soon.
GPT-4, GPT-4o, GPT-4.1, GPT-4.5: What’s With the Names
These are four different models that only share a number. GPT-4 is the 2023 original. GPT-4o (2024) was faster, cheaper, and understood images and voice. GPT-4.1 (April 2025) was built for developers and long context. GPT-4.5 was a brief experiment from early 2025, withdrawn from the API by July 2025. When you read “use GPT-4” in an old guide, the author almost certainly meant simply the best model in the paid plan, and that role today is filled by GPT-6 Astra.
Is ChatGPT 4 Free
The original GPT-4 was never free. The free plan first got GPT-4o (2024), and in 2026 it gets GPT-5.6 Luna, a model that’s newer and better in every way than the “GPT-4” you’re asking about. What exactly is in the free plan in September 2026 and where the limits start, we’ve detailed in our article ChatGPT for free.
Questions We Get Most Often
Was GPT-4 Better Than What’s Available Now?
No. In every comparison we’ve run, newer models win in language quality, code, and document work. The nostalgia for GPT-4 comes from it being the first model that truly surprised people, not from it delivering better results.
Where Do I Get “ChatGPT 4” in My Language?
You don’t need to look for anything: ChatGPT understands and writes in multiple languages in every plan, including free. We tested it in Polish (a useful proxy for non-English, heavily inflected languages) and covered language settings in our guide ChatGPT in multiple languages.
Are “ChatGPT 4” Apps in Stores the Same Thing?
Usually not. The only official app is called ChatGPT and is published by OpenAI. Apps with “4” or “GPT-4” in the name from other publishers are wrappers, often paid, that either use OpenAI’s API or cheaper models.
What to Choose Today
For regular text work, the free plan is enough, and we describe its limits in our article ChatGPT for free. For long documents, it’s worth checking out Claude. For things requiring fresh information with sources, Perplexity is better. And if you’re considering a subscription, we’ve gathered pricing in our plan comparison.
See also: OpenAI: what this company is and AI Mode in Google, where these same questions land today.
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