Where to Use GPT-4o in 2026 (ChatGPT No Longer Has It)

After OpenAI retired GPT-4o from ChatGPT in February 2026, the most common question is: where can I still use GPT-4o? The model is not gone. It is still available in two main ways: through the OpenAI API (for developers) and through chat applications that use that API (for everyone else). This article breaks down both options so you can choose what fits you.

Where GPT-4o is still available

OpenAI continues to offer the GPT-4o model on its developer platform. So "where to use GPT-4o" really means: (1) via the API in your own code or product, or (2) via a third-party app that calls the API and gives you a chat interface. ChatGPT itself no longer offers 4o as a model choice; that change is permanent unless OpenAI reverses it.

Option A: Chat apps that use the GPT-4o API

Several services connect to the GPT-4o API and present it as a chat product. You get a web (and sometimes mobile) interface similar to ChatGPT: you type, the model replies. You do not need an API key or any code. You typically sign up, get a free or paid plan with a token allowance, and start chatting. Get4oBack is built specifically for this use case. We use the GPT-4o API and tune the experience to match the ChatGPT-4o feel as closely as possible - same kind of layout, history, and tone. Pricing is transparent (free tier, then Plus and Pro with clear token caps), and we also offer Our-4o as a backup if OpenAI ever discontinues the 4o API.

This option is best if you want to use GPT-4o in 2026 without any technical setup. You get the same model with a familiar UX and predictable limits.

Option B: The OpenAI API (for developers)

If you are building an application, a tool, or an integration, you can call GPT-4o via the OpenAI API. You need an OpenAI account, a paid API plan, and an API key. You pay per token (input and output). The API gives you full control: you choose how to send prompts, handle responses, and integrate with your stack. The downside is that you must build and maintain the UI and infrastructure yourself. For non-developers, Option A is usually simpler.

Pricing comparison

ChatGPT Plus no longer includes GPT-4o. So if you were paying for Plus to get 4o, that option is gone. With the API, you pay per token (e.g. around $2.50 per million input tokens and $10 per million output tokens for GPT-4o, as of 2026). With Get4oBack, you get a monthly token allowance (free tier to try, then Plus or Pro) so you know your cost in advance. That can be easier to reason about than raw API usage if you mainly want to chat.

Summary

In 2026 you can still use GPT-4o in two ways: through a chat app that uses the API (e.g. Get4oBack) or by calling the OpenAI API yourself. Chat apps are the easiest path for most people; the API is for developers who need to embed the model in their own products.