The Ultimate Guide to Free AI API Keys: 6 Platforms You Need to Know

This guide provides an overview of six platforms offering free AI API keys (OpenRouter, Google AI Studio, Groq Cloud, GitHub Models, NVIDIA Build, Cloudflare Workers AI) for building AI applications without immediate billing. It details their utility, limitations, rate limits, and effective provider combinations for real projects, aiming to help developers avoid common pitfalls in API key management and scaling.