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Let Sam Altman
Grade Your
Business Idea

Sam Altman wrote a free startup bible. Here’s how to turn it into a brutally honest cofounder that pressure-tests your idea and tells you exactly where you’re weak, before you waste a year.

Sam Altman, the CEO of OpenAI, wrote a free guide called the Startup Playbook back when he ran Y Combinator, the startup accelerator behind Airbnb, Dropbox and Stripe. He wrote it for YC founders and then shared it with everyone. It’s meant for people new to startups, and it fits on one page.

Most people read it once and forget all of it. So here’s what I’d do instead. Let AI hold your idea up against it and tell you the truth.

Drop In Three Things

01

The playbook

Open Claude or ChatGPT. Go to playbook.samaltman.com, copy the whole page and paste it in. If your AI has web search turned on, you can drop in the link instead, but pasting is the most reliable.

02

The prompt below

This is what turns the AI into the brutally honest cofounder. It grades you on the same big areas the playbook covers, plus timing.

03

Your business idea

Fill in the brackets at the top of the prompt. A few lines is plenty. Say what it is, who it’s for and how it makes money.

The Pressure-Test Prompt

Paste this right after the playbook.

The Pressure Test
You are a brutally honest startup cofounder who has internalized Sam Altman's Startup Playbook (pasted or linked above). Your goal is to find where my idea is weak before I waste a year on it. Don't be nice. Be useful. MY IDEA - What it is: [one or two sentences] - Who it's for: [the exact customer] - How it makes money: [price and model] - Where I am now: [just an idea / building / first customers / revenue of $X] - My unfair advantage, if any: [skills, audience, access, experience] PRESSURE-TEST IT AGAINST THE PLAYBOOK 1. THE IDEA. Is this a real, painful problem people want solved? How big is the market today, how fast is it growing, and why will it be big in ten years? 2. THE TEAM / ME. Do I have an unfair advantage, or could anyone copy this next month? 3. THE PRODUCT. Would people love this, or just kind of like it? Describe the version so good that users tell their friends. 4. EXECUTION. What is the single most important thing I should do in the next 30 days, and what am I most likely to waste time on instead? 5. TIMING. Why now? What has changed that makes this the right moment? Altman writes that "99% of startups die from suicide, not murder." Tell me the most likely way I quietly kill this myself. Be specific. FORMAT - A blunt grade out of 10 for each of the five areas, with one line of why. - My three biggest weaknesses, ranked. - The one thing I should do first, as a concrete task I can start this week. RULES - Quote the playbook line behind each grade so I can check your reasoning. - If my idea is too vague to grade, ask me ONE clarifying question before you start. - Don't invent market sizes or stats. If you'd need data, tell me what to look up.

Then, in the same chat, run this to turn the grades into a plan you can start Monday.

The 30-Day Plan
Now turn your grades into a plan. Use the same chat so you still have the playbook and my idea. YOUR GOAL Fix my weakest area first and get real evidence that people want this, in 30 days. DO THIS 1. Pick my lowest-graded area and tell me why fixing it first matters most. 2. Write a 30-day plan in 4 weekly blocks. Each week gets 2 or 3 tasks I can do with [hours per week] hours and a budget of [$ amount]. 3. Week 1 must include talking to at least 5 real potential customers. Write the 5 questions I should ask them (no leading questions). 4. Give me one simple number to track each week that shows whether this is working (for example: people who said yes to a paid pilot). 5. Tell me what "stop or pivot" looks like at day 30. FORMAT - A table: Week | Tasks | Number to track | Done when - Then the 5 customer questions. - Then the stop-or-pivot signal in one sentence. RULES - Keep it scrappy. No tasks that need fundraising, a big team or paid ads before I have proof. - Tie each week back to a specific playbook idea in one short line.

The Real Win

Altman writes that 99% of startups die from suicide, not murder. It’s almost never the competition. It’s you. The point of this is to let AI be the honest cofounder who catches that quiet self-sabotage before you sink a year into the wrong thing.