Every Topic: Building and Running a Company with AI

Which AI model should you build on?

Which model writes your product's code, answers its users and runs its agents decides what your company can do and what every request costs. These guides compare the models founders actually build on, with every price and context window read from its record, so the numbers stay current when a lab reprices.

What does AI cost to run, and how do you cut it?

An AI product's margin is decided by tokens: which model answers, how much of each prompt is cached, how hard the model thinks, and what you charge for the result. These guides work through the levers with real prices.

How do you build software with AI?

From a first prompt to a product that holds real users: the AI builders and coding agents, how to take a site or an app live, and how to make it look like nobody else's.

What should your product run on?

The services a product rests on once it is live: its database, payments, email, sign-in, hosting, integrations and the APIs it calls, compared on price, lock-in and what each costs you at scale.

How do you run a company with AI agents?

Agents that answer the phone, run the back office, browse the web, spend within limits and work in parallel: how to give them an identity, a budget and work that is safe to leave unattended.

How do you get found and get customers?

Being found by people and by AI answer engines, being recommended inside ChatGPT, selling to AI agents, and building the communities and word of mouth that bring the first customers.

Where can a founder get money?

Venture firms with an AI thesis in the US and in Europe, the accelerators that fund founders, grants and the free credits a company can claim without giving up equity.

How do you keep an AI-built product safe and compliant?

The patches to apply now, the checks to run before launch, the rules an AI product must meet in the EU, and what to do when a model your product depends on is shut off.

What is worth building now?

Where founders are, what investors and accelerators fund, which markets AI is opening and which software is still left to build.

Where the numbers come from

The figures in these guides link to their records under Data, re-read from their sources on a schedule, so a guide shows the current number even where its prose is older.