Short answer: for a Node.js service that turns logistics sales calls into CRM actions, use a unified gateway when one key and simple fallback matter, but choose it by structured-output evidence rather than by the length of its model list. Start with the scoreboard. A gateway earns its place only when it preserves usable CRM actions as traffic moves among OpenAI, Claude, and Gemini. Option Pick it when Evidence to demand Managed unified gateway One chat contract and f...