Import Anthropic Chats to just4o.chat

Claude users are having the same argument GPT-4o users already had: the model they built habits around is being moved out of reach in the main app.

People are posting screenshots, asking where Sonnet 4.5 went, and trying to figure out whether the version they trusted is actually gone or just hidden behind a product decision. That distinction matters. The Claude app can change what it offers in the picker. Anthropic’s API can still expose models that no longer feel accessible inside Claude.ai.

just4o.chat is built for exactly that gap.

Our Anthropic import tool lets you bring your Claude export into just4o.chat: conversations, memories, and projects. It now works alongside our ChatGPT import path, so your old AI work does not have to stay trapped inside one provider’s product surface.

Claude exports should become usable context

An Anthropic data export is not a souvenir. It can contain real work: project chats, planning threads, code reviews, emotional check-ins, research sessions, and the little preferences that make a model feel like it understands the assignment.

The importer reads the export zip, shows what it found, and lets you choose what comes over before anything is written to your account.

You can import selected Claude conversations. You can bring over Claude memories after reviewing them. You can recreate projects with their relevant chats attached, instead of flattening everything into one long pile of history.

That is the point: the structure matters.

Sonnet 4.5 still matters to people

Model upgrades are not always upgrades for every person.

Some users prefer how a particular checkpoint writes, reasons, refuses, codes, or collaborates. Sonnet 4.5 has that kind of user attachment. When a model disappears from the app, the loss is not abstract. It breaks muscle memory.

On just4o.chat, Sonnet 4.5 can sit next to GPT-4o, Gemini 3.1, Grok 4.3, and more. You can bring Claude context in, then choose the model that fits the next step.

That is different from importing an archive and leaving it cold. The imported work becomes part of a live workspace.

ChatGPT import and Anthropic import now sit side by side

We already support importing ChatGPT conversations from OpenAI exports. The Anthropic importer extends the same idea to Claude users, but with the extra shape Claude exports can carry: conversations, memories, and projects.

The product direction is simple. Your AI history should be portable enough to survive provider churn.

If OpenAI changes what ChatGPT feels like, your best context should not vanish. If Anthropic changes the Claude app model picker, your Claude work should not become stranded. just4o.chat gives both histories a place to land.

Bring the work, then choose the model

Importing is not the final feature. It is the beginning of continuity.

Bring over the chats that still matter. Keep the project context together. Review memories before they become part of your account. Then keep working with Sonnet 4.5, GPT-4o, Gemini 3.1, Grok 4.3, or another model from the same workspace.

The provider app can change.

Your work should not have to start over.