The IndexMethod
Run the equation

Open Codex

Free. One model, one hour, monthly, live. The front door to the Codex.

Price Free
Format Live, online
Cadence Monthly
01 / What it is

One model. One hour. Free.

Each month we take a single mental model from the Codex and teach it live, in an hour. No curriculum to buy into, no funnel to climb — one idea you can use the next morning.

The door is free on purpose.

Most of what the world calls AI training is a tool demo with a price behind a “schedule a call”. The Open Codex is the opposite: the thinking, in public, at no cost. We give the model away because the next era of work is too important to be the property of any one company.

If it lands, the rest of the school is here when you want it. If it doesn’t, you still leave with a way of thinking you didn’t have an hour ago. That is the whole deal.

02 / Next session

Be in the room.

There is no fixed date yet, and we will not invent one. Here is exactly where things stand.

Next session

The first Open Codex runs in 2026. Join the list and you’ll get the date, the model, and the link — nothing else. No drip campaign, no countdown timer, no scarcity games.

No tracking, no newsletter sign-up. A person reads every message.

03 / The format

Twenty, twenty, twenty.

One hour, three even parts. The shape never changes, so you always know what you are walking into.

00:00 – 00:20

The model

One mental model from the Codex, drawn out from first principles. The why before the how.

00:20 – 00:40

A worked example

The same model run on a real piece of work, live, with the agent in the room — not a recording, not a mock-up.

00:40 – 01:00

Your questions

Open floor. You bring the problem from your own job; we work it together. No slides for the sake of slides.

04 / Past sessions

Recordings, once there are any.

Recordings · status

Recordings land here after the first session. Nothing to backfill, nothing faked. When a session has happened, the replay and the model it covered will sit on this page — and not a moment before.

05 / The Codex it opens

The first layer of five.

The Open Codex is one of five layers of the school — the way in. Behind it sit the cohort, the executive work, and the rest of the method.

The door is open.

One model, one hour, monthly, live, free. Join the list and we'll send you the first date.