Many minds. One answer.

Three frontier models, one from each lab. They work on the same question independently—without seeing one another—then Claude fuses the strongest thinking into one clear result.

Install LLM Fusion View the source

Free · Claude Code plugin · Your own model subscriptions

Fused
answerJudge-selected

ClaudeFable 5.1

CodexGPT-6 Astra

Grok4.6

How it works

Independence first. Fusion second.

01 · Seat

Three labs, one council

Claude Fable 5.1, Codex GPT-6 Astra, and Grok 4.6 take the same seat at every run. Nothing to configure.

02 · Seal

Each thinks alone

Every model receives the same brief in a fresh session. No one can copy or anchor on another answer.

03 · Fuse

One answer survives

The answers are anonymised before judging, so the strongest reasoning wins—not the biggest model name.

Two ways to use it

Decide better. Build better.

Use Fusion when one AI answer is too easy to trust. It is built for decisions where blind spots matter and projects where several strong plans should compete before you commit.

✓

Fusion CouncilPressure-test a choice through different expert lenses, then receive one judged decision memo.

✓

Fusion BuildAsk all three models to plan the same job, fuse the best plan, then build and audit it.

✓

Visible receiptsEvery run records which models were selected, what survived, and where the final result came from.

✓

Three live-tested routesFable 5.1, GPT-6 Astra, and Grok 4.6 were each called successfully in the v1.5 release check.

Install

Give this to Claude Code.

Paste the three lines into Claude Code. They add the marketplace, install the plugin, and reload plugins once.

Copy into Claude Code

/plugin marketplace add gabrieljudah/llm-fusion
/plugin install llm-fusion@fusion
/reload-plugins

Already installed? Run /plugin marketplace update fusion, then /plugin update llm-fusion@fusion, then /reload-plugins. Refreshing the marketplace alone does not replace the installed plugin.

Good fit if you…

Already use Claude Code for serious work
Want independent model opinions, not one long chat
Have Claude, Codex, and Grok access (Codex 0.153 or newer)

Not a fit if you…

Only need a quick, low-stakes answer
Do not have all three provider apps set up
Want the models to share one conversation

Stop asking one model to be a whole council.

Install LLM Fusion and let three labs disagree before you act.

Open LLM Fusion →