The just4o.chat Model Deprecation Calendar Is Live

We added a public model deprecation calendar to just4o.chat.

It exists for a simple reason: people should not have to guess when a model is going away.

AI models are starting to feel less like interchangeable tools and more like places where people do real work. You might have a long-running project, a favorite writing model, a research workflow, or a familiar assistant style. When one of those models is retired upstream, it can change the way your workspace feels overnight.

The calendar is our way of making those changes easier to see before they become a surprise.

What You Can See

The page shows three things in plain language.

First, it shows upcoming retirements. These are models with a published shutdown date or retirement window.

Second, it shows models that are no longer available. If a model has already been removed, we do not want it sitting in the app like it is still a normal choice.

Third, it shows active models with no published retirement date. That does not mean they will be available forever. It means there is no current public date for removal in the sources we are tracking.

As of this draft, the calendar shows 24 scheduled shutdowns, 5 earliest-retirement windows, 14 removed models, and 54 active models with no published retirement date.

Why This Matters

just4o.chat is built around direct model choice. If you select a model, the point is that you know what you are using.

That promise gets weaker if model changes are hidden, vague, or buried in provider notices. So we are making the lifecycle visible in the product itself.

When we know a retirement date, we show it. When we know the likely replacement, we show that too. When a provider has only published an earliest possible date, we label it carefully instead of pretending it is a final deadline.

The goal is not to make the model landscape feel more complicated. The goal is to make it feel less mysterious.

What Is Already On The Calendar

The calendar currently includes upcoming and recent lifecycle changes across providers including OpenAI, Google, Anthropic, xAI, and Fireworks-hosted models.

The next dated item is Gemini 3.1 Flash-Lite Preview, with a scheduled shutdown date of May 25, 2026. The page also includes Imagen retirements, OpenAI snapshot shutdowns, Claude retirement windows, and recently removed Grok and Fireworks-hosted model options.

For users, the practical value is straightforward: before you settle into a model for an important workflow, you can check whether it has a published retirement date.

Where To Find It

The calendar is live at:

just4o.chat/deprecation-calendar

You can also find it from the site navigation, FAQ, footer, and sitemap.

We will keep updating it as providers publish new dates or change availability. Model choice should feel legible, especially when the models themselves keep changing.