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

Modelos

Por chamada: $0,001-0,01 (APIs simples). Por token: $1-60/milhão (APIs de IA). Freemium: 1.000-10.000 chamadas grátis. APIs de IA (GPT, Claude) custam $1-60/milhão de tokens. 1 milhão de tokens ≈ 750.000 palavras.

Otimizar

Cache respostas (reduz 30-70%). Use o modelo mais barato que atende. Batch requests quando possível. No Brasil, a comunidade dev está adotando APIs de IA rapidamente — startups brasileiras como Loft, QuintoAndar e iFood usam extensivamente.

⚡ 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

Quanto custa API de IA?▾

Varia 100× entre modelos. Modelos leves: $0,25-1/M tokens. Premium: $15-60/M. Escolha pelo necessário.

Como reduzir custos?▾

Cache (30-70% economia), modelo adequado à tarefa, prompts mais curtos, batch processing.

✓ 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 →