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FusionHarness – An Open-source Mixture-of-Agents compound-model server

by jackxlau·Jun 17, 2026·4 points·1 comment

AI Analysis

●●SolidShip ItSolve My Problem

Self-hosted OpenRouter Fusion alternative with judge-synthesizer architecture for budget models.

Strengths
  • OpenAI API compatibility means it drops into any existing client with just a base_url change.
  • Judge extracts consensus, contradictions, and unique insights before synthesizer writes final answer.
  • Integrations for Pi, Claude Code, aider, Continue, and LangChain out of the box.
Weaknesses
  • Mixture-of-Agents pattern isn't novel—OpenRouter's Fusion API already pioneered this approach.
  • Zero GitHub stars suggests brand-new project with unproven stability and adoption.
Category
Target Audience

Developers building LLM applications who want self-hosted multi-model orchestration

Similar To

OpenRouter Fusion API · LangGraph · DSPy

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