Zero-Cost AI in Production: How Fallback Chains Beat Provider Limits

As AI costs remain prohibitively expensive for many builders, this architecture demonstrates how to achieve production-grade LLM functionality by exploiting free tiers and fallback redundancy. The approach solves two critical problems simultaneously: eliminating AI costs while improving reliability through multi-provider failover. For developers shipping AI-powered features without large budgets, this pattern offers a practical blueprint for scalable, fault-tolerant systems.