5i runs your prompt through five of the world's most powerful AI models simultaneously, then synthesizes their outputs into one neutral, structured consensus — without picking a winner.
Enter any question, problem, or research topic in the main input. Works best with open-ended questions where different models might disagree — that's when 5i earns its keep.
Each model answers sequentially, building on the previous response. You'll see them stream in one by one. The chain runs GPT → Claude → Gemini → Mistral → Grok.
The green block at the top is the Synthesis Engine's output — a neutral aggregation of all five perspectives. The main answer is shown immediately. Hit "Tell me more" to expand the full breakdown: what everyone agreed on, where they diverged, and unique insights from individual models.
Below the consensus you'll see each model's individual contribution with cost estimates and timing. Useful when you want to see the raw reasoning before it was synthesized.
The consensus block isn't a summary. It's produced by a constrained AI instance playing the role of a neutral meta-analyst — not a judge, not a summarizer. It's been explicitly told to behave differently than it normally would.
A clean, direct answer to the original question — synthesized from all models, not copied from any one of them.
What all or most models explicitly agreed on. If fewer than 3 models agree, it doesn't count as consensus.
Where models meaningfully disagreed. Not smoothed over. Not averaged. Preserved as-is for you to evaluate.
Insights that only one model mentioned. Often the most valuable signal — the outlier that turns out to be right.
What none of the models could resolve. Uncertainty is surfaced, not hidden. This is a feature, not a bug.
5i can run on server-side keys (set by the host) or your own API keys stored locally in your browser. BYOK means your keys never touch the server — they're sent directly with each request and stay in your localStorage.
Click the Set button next to any model. Paste your API key. Done.
Green badge = server key. Amber badge = your key. Your key always takes priority.
Stored in localStorage. They survive page reloads. Use the BYOK button to clear all and start fresh.
| Model | Provider | Get Your Key |
|---|---|---|
| GPT-4o | OpenAI | platform.openai.com/api-keys ↗ |
| Claude | Anthropic | console.anthropic.com ↗ |
| Gemini | aistudio.google.com ↗ | |
| Mistral | Mistral AI | console.mistral.ai ↗ |
| Grok | xAI | console.x.ai ↗ |
5i shines when models disagree. "What's the best way to handle auth in a React app?" will get 5 different answers — the divergences section is where the real value lives.
The vertical faders on the left panel adjust each model's weight in the synthesis. Turn down Grok if you want less chaos. Turn up Claude if you want more nuance.
Set a system prompt before synthesizing to frame all models in a specific context — "you are advising a startup CTO" will shift all five responses meaningfully.
The bar below the Synthesize button shows Agreement, Divergence, Consensus %, and Confidence in real-time. High divergence on a factual question = a model might be wrong.