hashangit/openfusion

Frontier-grade answers from any mix of models — now in your own MCP server.

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OpenRouter showed that synthesizing the outputs of several models consistently beats any single frontier model — and that you don’t even need expensive models to get there. In their Fusion announcement, a panel of cheap models fused together outperformed solo frontier models on deep-research tasks, landing within striking distance of top-tier models at a fraction of the cost.

The catch: you had to use OpenRouter.

OpenFusion removes that catch. It’s a local MCP server that brings the exact same Fusion architecture to any MCP-capable coding agent or client — Claude Code, Cursor, Cline, Zed, Codex, Gemini CLI, Continue, and 18+ others. Bring your own keys for any provider; OpenFusion runs entirely on your machine.

✨ The Fable 5 opportunity

OpenRouter’s headline finding: a budget panel of cheap models, fused, landed within ~1% of Claude Fable 5 on deep research — at roughly half the price. OpenFusion lets you build that budget panel yourself, with the cheapest models from any providers you like. Fable-5-class answers, at budget-panel cost, from the agent you already use.

Quick start

Zero to your first fusion in ~5 minutes. Requires Node.js 22+.

1. Install:

npm install -g openfusion-mcp

2. Set up your project — register OpenFusion with your MCP client and install the agent skill:

openfusion-setup

The interactive installer detects your client (Claude Code, Cursor, Cline, Zed, Codex, Gemini CLI, ZCode, …), writes its MCP config, and drops the openfusion skill into the right place. Then restart your client so it spawns the server.