Import Anthropic Chats to just4o.chat

Claude users are having the 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, trying to work out whether the version they trusted is gone or just buried behind a product decision. The distinction matters. The Claude app can change what it offers in the picker while Anthropic's API still exposes models that no longer feel reachable inside Claude.ai.

just4o.chat is built for exactly that gap. Our Anthropic import tool brings your Claude export into just4o.chat — conversations, memories, and projects — and it now works alongside our ChatGPT import path, so your old AI work doesn't stay trapped inside one provider's product.

Claude exports should become usable context

A Claude export holds real work: project chats, planning threads, code reviews, emotional check-ins, research sessions, and the small preferences that make a model feel like it understands the assignment. The importer reads the export zip, shows you what it found, and lets you choose what comes over before anything is written to your account.

Import selected conversations. Bring over memories after you review them. Recreate projects with their relevant chats attached, instead of flattening everything into one long pile of history. The structure is the point.

Sonnet 4.5 still matters to people

A model upgrade isn't an upgrade for everyone. People get attached to how a particular checkpoint writes, reasons, refuses, codes, or collaborates, and Sonnet 4.5 has exactly that kind of following. When a model disappears from the app, the loss is concrete: it breaks muscle memory.

On just4o.chat, Sonnet 4.5 sits next to GPT-4o, Gemini 3.1, Grok 4.3, and more. Bring your Claude context in, then pick the model that fits the next step. The imported work lands in a live workspace instead of sitting cold in an archive.

ChatGPT import and Anthropic import now sit side by side

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

The direction is plain — your AI history should be portable enough to survive provider churn. If OpenAI changes what ChatGPT feels like, your best context shouldn't vanish. If Anthropic changes the Claude picker, your Claude work shouldn't be stranded. just4o.chat gives both histories a place to land.

Bring the work, then choose the model

Importing is where continuity starts. 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 shouldn't have to start over.