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Most devs overpay for Claude API by 3-16x. RPG Materia teaches you to fix that — through 5 gamified missions, real code, and a GRIM owl who judges your choices. • M1: Token audit (where your money actually goes) • M2: Prompt caching (90% off repeated context) • M3: Model routing (Haiku is 12x cheaper) • M4: Output control (stop paying for silence) • M5: Batch API (async = 50% off) Free to play. Pay what you want. Certificate included.
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 🔮
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About RPG Materia — Grimoire Academy on Product Hunt
“Cut Claude API costs 80% by playing an RPG. Free.”
RPG Materia — Grimoire Academy was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #152 on the daily leaderboard. Most devs overpay for Claude API by 3-16x. RPG Materia teaches you to fix that — through 5 gamified missions, real code, and a GRIM owl who judges your choices. • M1: Token audit (where your money actually goes) • M2: Prompt caching (90% off repeated context) • M3: Model routing (Haiku is 12x cheaper) • M4: Output control (stop paying for silence) • M5: Batch API (async = 50% off) Free to play. Pay what you want. Certificate included.
RPG Materia — Grimoire Academy was featured in Education (78.7k followers), Developer Tools (514.1k followers) and Artificial Intelligence (471.1k followers) on Product Hunt. Together, these topics include over 201.3k products, making this a competitive space to launch in.
Who hunted RPG Materia — Grimoire Academy?
RPG Materia — Grimoire Academy was hunted by Felipe Pazini. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Felipe Pazini