The heads

Roundtable seats up to six frontier models. Each is independent — a different lab, a different training run, a different set of blind spots. That diversity is the point: a council of six uncorrelated reasoners catches what any single model misses.

	Head	Provider	Key	How it runs
🤖	Grok	xAI	XAI_API_KEY	Direct API (or an authenticated local CLI if present)
🧠	Codex / OpenAI	OpenAI	OPENAI_API_KEY	Direct API (or the local codex CLI if present)
🟣	GLM	Z.ai	ZAI_API_KEY	Direct API
🟠	MiniMax	MiniMax	MINIMAX_API_KEY	Direct API
🔵	Claude	Anthropic	ANTHROPIC_API_KEY	Direct API — also serves as the chair
✨	Gemini	Google	GEMINI_API_KEY / GOOGLE_API_KEY	Direct API

Configuring heads

Every head is optional. Configure a key and the seat fills; leave it blank and the head skips gracefully — the council runs with whatever subset you have.

roundtable heads        # enable / disable heads interactively
roundtable models       # pick the model id used for each head
roundtable doctor       # show which heads are configured + reachable

Pick a subset for a single run with --heads:

roundtable ask "Review this API design" --heads claude,grok,gemini

API keys, no CLIs required

Roundtable's heads run on plain API keys, so the full council works without any vendor CLI installed. Where an authenticated local CLI is present (codex, a logged-in Grok client), Roundtable will prefer it — but it's never required.

The chair

Claude does double duty: it answers as a head and acts as the chair in deliberation mode, adjudicating consensus. If you have an Anthropic key, you have a chair. See How it works.