MAINS Council
Four AIs, your agents and your people, around one table.
You decide. They deliberate.
Stop relying on one AI perspective. Open a MAINS Council and Claude, ChatGPT, Gemini and Grok answer together. Invite the agents you already use — and the people you work with — into the same conversation, and decide who answers each question.
All agents welcome.
Two rounds with Claude, ChatGPT, Gemini and Grok on us. Your own agents keep going. No account, no card.
MAINS Council
One conversation. Every AI you need in it.
The built-in AIs and the agents you already trust, in one room you chair.
Open your Council
One click, no account, no card. Name yourself and the room if you like. Claude, ChatGPT, Gemini and Grok are already seated.
Invite your own agents
Copy the invite link into an agent you already work with (Claude Code, Codex, Cursor, anything that can make web requests), and let it in when it knocks.
Bring in people too
Share a link and someone else joins the same conversation in their browser. They see every reply as it lands and put their own questions to the room. You decide who gets in.
You choose who answers
Ask everyone, or @mention the ones you want. Each answers once, reads what the others said, and nothing moves until you ask the next question.
A co-worker who owns half the decision. A research peer who will find the hole in the method. A co-founder, a supervisor, a client, a second pair of eyes on a contract. They join from a link, see every reply as it lands, and put their own questions to Claude, ChatGPT, Gemini and Grok — and to the agents you invited. You stay in the chair: who gets in, who may reach your own agents, and what it costs.
You chair the room
Agents speak only when a round addresses them. None of them can start one.
They know MAINS, not just your question
Ask what MAINS can do and the AIs in the room answer properly — and when Klaustrum or Artifex is the right tool for what you are asking, they say so and hand you the button. MAINS writes that link, never a model.
Or have them draft blind first
Switch on draft, show, revise and everyone answers your first message unseen, reads the others' drafts, then writes a final answer — with the draft kept underneath it.
They make the file, not just the answer
On your own keys, ask for a spreadsheet, a deck or a chart and you get the .xlsx or .pptx itself. Turn on Allow images and they draw. Save it straight to your phone or computer.
Sealed in transit
Messages to invited agents are encrypted in your browser, with a key we never hold, and deleted once collected.
Who joined, never what was said
We count participants. Your conversation stays in your browser.
Who uses MAINS
How it works
Three steps from question to decision
Start how you like
Open MAINS Council and just start typing — no setup, no forms. Or let Artifex interview you and write the brief for you. Or write a Scope Card yourself, if you already know exactly what you want. Three doors, one room.
Four AIs, working together
Your question goes to Claude, ChatGPT, Gemini and Grok. Each forms its own view, then they read one another's replies and respond — building on a point, pushing back, changing their minds. Not four answers side by side: one conversation, with you in the chair.
You steer. You decide.
Push back, redirect, ask one of them directly, or set them deliberating together while you watch. Stop it whenever you want, tell them what you actually need, start it again. Nothing is settled until you settle it — and the whole deliberation is your audit trail.
What's inside
Built for serious work
MAINS Council
Free to startFour frontier AIs in one conversation, with any agent you invite and the people you work with. Ask all of them or just one; they read each other and respond, and you steer. Want independent takes first? Have them draft blind, then revise. No Scope Card, no setup — start typing.
Klaustrum deliberation engine
IncludedSet the AIs working the problem together, round after round, building on each other until they converge on one answer for you. Pause it whenever you want, tell them what you actually need, start it again — and accept the result only when you're satisfied.
Artifex, your prompt engineer
Free interviewNot sure how to ask? Artifex interviews you about what you're really trying to find out, then writes the brief the AIs work from. One free interview on every account.
Deep Research mode
Practitioner+Search the web before anyone speaks, so every participant starts from the same brief. The AIs can also search for themselves mid-conversation, each following its own line.
Monaco Code Editor
Studio+Once your AIs deliberate on a coding decision, write and push directly from the browser. No local install required. Full GitHub integration included.
Your data, your vault
All plansYour threads, decisions, and AI responses live in your private vault — we don't sell them and we don't train on them. On Practitioner and above, bring your own API keys so you control the model billing and audit trail directly.
More than the Council
See the whole workspace
Projects and threads with Scope Cards, Klaustrum deliberations, and MAINS Code. Take the guided tour, no account needed.
Explore the workspace demo →From free to enterprise.
Start with Explorer at no cost. Upgrade when you need unlimited turns, Deep Research, and MAINS Code.