How I built a provider-agnostic AI architecture that automatically switches between Groq, OpenRouter, Ollama, and Gemini.

1Key Takeaways

• 🚀 Building a Production-Ready Multi-LLM Router with LangChain & FastAPI How I designed CVForbes to automatically switch between Groq, OpenRouter, Ollama, and Gemini without changing a single service.
• Client │ ▼ FastAPI Endpoint │ ▼ Dependency Injection │ ▼ LLMRouter Service ┌────────────┬──────────────┐ │ │ │ ▼ ▼ ▼ GroqProvider OpenRouter OllamaProvider │ │ │ └────────────┴──────────────┘ │ GeminiProvider │ ▼ LangChain Models │ ▼ Structured Output Introduction When building CVForbes , I….