Tech

Calculate API Costs — OpenAI, Claude, and More

Built by Kevin Glover · @gloverbuilds · Verified formula

Estimate monthly API costs based on request volume, token usage, and model selection.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Understanding API Token Pricing
Optimizing API Costs

Modelle

Pro Aufruf: $0,001-0,01. Pro Token (KI-APIs): $1-60/Mio Tokens. Freemium: 1.000-10.000 Aufrufe gratis. KI-APIs (GPT, Claude): $1-60/Mio Tokens. 1 Mio Tokens ≈ 750.000 Woerter.

Optimieren

Caching (30-70% Ersparnis). Passendes Modell waehlen. Batch-Requests. Die deutsche Startup-Szene (Berlin, Muenchen) nutzt KI-APIs intensiv.

⚡ CalcWolf Insight

The single biggest API cost mistake: using GPT-4 or Claude Opus for every request. Route simple tasks (classification, formatting, short answers) to cheap models (Haiku, GPT-4o-mini) and reserve expensive models for complex reasoning. This hybrid routing approach cuts costs 60-80% with minimal quality impact.

Frequently asked questions

KI-API-Kosten?▾

Leichte Modelle: $0,25-1/Mio Tokens. Premium: $15-60/Mio. Aufgabengerecht waehlen.

Wie reduzieren?▾

Caching: 30-70%. Richtiges Modell. Kuerzere Prompts. Batch-Verarbeitung.

✓ Math logic verified against primary sources → See our verification process

Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →