Multi-Model AI API Gateway - Complete Setup Guide + Code

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Description

Complete guide and code for building an OpenAI-compatible multi-model API gateway. Supports Claude, Gemini, DeepSeek, GPT-4, Kimi through one endpoint. Includes key rotation, rate limiting, streaming, Cloudflare tunnel setup, Docker deployment, and full documentation. Avoid vendor lock-in and save 80%+ on AI costs.