Local-first multi-model AI workspace

Every model.
One workspace.

Cohesin brings your AI conversations, projects, files, agents, and tools into one coherent desktop command center—with your choice of model at every step.

See the workspace The Cohesin vision

Define the next milestone Claude 4.5 Sonnet⌄

Using the project context, what should we build next?

Cohesin Claude 4.5 Sonnet

Your strongest next step is real provider integration. Start with one adapter, true streaming, secure key storage, and model capability metadata. That proves the core architecture before you add agents or tools.

Message Cohesin…↑

OpenAIClaudeGeminiOpenRouter

Why Cohesin

Your models should work together. Your context should travel with you.

Today, the best AI work is scattered across separate chats, providers, files, and tools. Cohesin is designed to hold them together in one provider-independent workspace—without trapping your work inside one model's ecosystem.

One coherent workspace

More than
another chat window.

Move from a quick question to deep project work without rebuilding context or switching between disconnected AI apps.

Multi-model chat

Choose OpenAI, Claude, Gemini, or OpenRouter for each conversation.

Projects & context

Keep related conversations, files, and instructions together.

Conversation history

Your work remains organized, searchable, and ready to continue.

Prompt library

Save the instructions and workflows you return to most.

Agents & tools

Give specialized assistants the context and capabilities they need.

MCP connections

Connect AI to external tools through an open, extensible standard.

The vision

The model is not the workspace.
It is one reasoning engine inside it.

Cohesin makes models interchangeable while your conversations, projects, instructions, files, and tools remain persistent. Over time, it becomes the command center where multiple forms of intelligence can collaborate around your work.

Cohesin / Multi-model AI workspaceConversation → context → action

Foundation

Your workspace.
Your keys. Your choice.

Built as a desktop-first application with privacy, portability, and provider independence at the center.

Local-first by default

Conversations, project information, settings, and application state live on your device by default. Optional sync can come later without becoming the foundation.

Desktop firstPrivatePortable

Provider-independent

Cohesin is designed around capabilities, not one company's API. Switch models without giving up the workspace, structure, or history around them.

Bring your keysOpen architectureNo lock-in