Your support bot is fine until OpenAI returns 429s for twenty minutes. If the app called openai.OpenAI() with a single model string, those twenty minutes are an outage. Not because the product broke — because you married one vendor in the client code. LiteLLM gives you one OpenAI-compatible interface over 100+ providers, plus a Router that retries inside a model group and falls back to another group when the primary keeps failing. Your feature code keeps talking "chat completions." R...