Hey PH 👋 I built RPG Materia because I kept watching devs — myself included — pay 3-16x more than necessary for Claude API calls. The docs are clear, the math is simple, but somehow it never clicks until you actually feel it. So I gamified it. You play as a developer auditing API costs across 5 missions. Real code. Real numbers. A sarcastic owl named GRIM who judges your choices. You unlock trophies when you get it right, and lose XP when you don't. The core insight behind the game: → Haiku is 12x cheaper than Sonnet for simple tasks → Prompt caching cuts costs 80-90% on repeated context → Output token limits are often the biggest hidden cost → Batch API gives 50% off for non-realtime workloads It's free to play. Pay what you want if it saves you money. Certificate included at the end. Happy to answer any questions about the design decisions, the gamification mechanics, or the Claude API specifics. AMA 🔮

RPG Materia — Grimoire Academy

Cut Claude API costs 80% by playing an RPG. Free.

Cut Claude API costs 80% by playing an RPG. Free.