OpenRouter
One key reaches hundreds of models, billed by usage, with automatic fallback when the primary provider fails. Whether it plugs into your own tools depends on the API being OpenAI-compatible and the base_url being right.
OpenRouter takes model choice away from any single vendor: one key covers hundreds of models, billed by usage, with routing to a backup provider when the primary one fails. It also works as the model layer of creative and agent workflows – ComfyUI swaps models inside a node, while Hermes needs one that supports tool calling. Wiring it into your own platform fails on protocol, not brand: wrong OpenAI compatibility or base_url and the call fails.
