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Keep the free fundamentals forever — start reading with no account at all, and a free sign-in opens every other free module. One purchase adds the searchable Cheatsheet, the five-module Advanced Track, and the OpenAI Codex and Google Gemini deep-dives — and Premium follows your login. Still exploring? Browse all modules first.
You're unlocked. 🎉 Premium content is now available on this device. Jump into the Cheatsheet, the Advanced Track, or the OpenAI Codex deep-dive.
| What you get | Free | Premium |
|---|---|---|
| Core Concepts + Getting Started Public tier — open to everyone, no account needed | ✓ | ✓ |
| Remaining Claude fundamentals (4 modules) with a Free account (one free sign-in) | ✓ | ✓ |
| OpenAI & Gemini overviews + "Choosing a Model" | ✓ | ✓ |
| Interactive "Try It" playground | ✓ | ✓ |
| Progress that follows your login across devices | ✓ | ✓ |
| Searchable Cheatsheet (full command reference) | — | ✓ |
| Advanced Track — 5 in-depth Claude modules | — | ✓ |
| OpenAI Codex CLI in Depth | — | ✓ |
| Gemini CLI in Depth | — | ✓ |
| Prompting Across Frontier Models | — | ✓ |
| Every future Premium module, plus updates | — | ✓ |
$49 one-time
One purchase. Activate your key while signed in and Premium follows your account everywhere (up to 2 accounts per key) — or unlock this device without an account.
Already purchased?
Enter the license key from your receipt to unlock Premium on this device. Signed in? The same key gets linked to your account instead, so Premium follows your login everywhere.
A key can be activated on up to 2 accounts. Once activated, you never need the key again — just sign in.