Documentation
Updated on February 11, 2026
just4o.chat gives you one place to talk to GPT, Claude, Gemini, and Grok—with memory that evolves, projects that isolate context, and personas that keep a consistent voice across all of it. Pick a topic below to dive in.
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Memory
Layered memory with RAG, default and experimental modes, and the Background Memory Agent.
Projects
Sandboxed workspaces with separate chats, memories, and files. Keep work and life separate.
Personas
Custom characters with their own voice and memories. Use the same persona across global and project chats.
Just4o.chat Files
Central file hub for uploads and AI generations. RAG retrieval, limits by tier.
Web Search
Real-time web search in chat. Toggle on for live results from GPT, Claude, Gemini, or Grok-4.
Image Generation
Universal image gen tool. One interface, multiple models. Pricing per tier.
Importing Chats
Bring ChatGPT conversations into just4o.chat. Style RAG for tone matching.
Scopes of Data
How global, project, and persona scope keep your context clean and isolated.
Models
GPT, Claude, Gemini, Grok—choose the right model for each turn.