A developer migrated their AI stack from exclusive use of OpenAI's GPT-4o API to a multi-provider architecture using Global API, enabling access to 184 models including DeepSeek V4 Flash and DeepSeek V4 Pro. This migration reduced API costs by up to 40x for 95% of use cases with negligible quality difference, allowing more extensive usage, retries, and iterative improvements. The migration required minimal code changes and preserved existing features like streaming and function calling. The approach routes simple queries to cheaper models and falls back to GPT-4o only for complex cases, resulting in $4,200 savings in the first month and improved system scalability without vendor lock-in.

Jun 2, 2026, 1:00 AM