LLMFly AI

LLMFly AI is a developer-focused API gateway that lets you call multiple large language models through one unified endpoint. Instead of managing separate SDKs, authentication, and billing for each provider, you get a single API key and base URL that works with the OpenAI SDK you probably already use. The platform supports models from OpenAI (GPT series), Anthropic (Claude), Google (Gemini), and xAI (Grok), and it surfaces official reference pricing alongside its own rates so you can compare costs before sending traffic.

The setup is straightforward: create an API key (you can generate separate keys for each app and environment), point your client to LLMFly AI's base URL, and paste in a model ID from the catalog. The service handles routing, authentication, and billing. It also lets you test streaming and structured output on compatible routes. One standout feature is the ability to keep development and production environments independent — if a key leaks, you revoke just that one without affecting others. Usage history shows exactly what each request cost, broken down by input, output, and cache tokens.

This tool is built for developers who work with multiple LLM providers and want to avoid juggling different integrations. It's especially useful for teams building AI agents, chatbots, or coding assistants that need to switch between models depending on the task. The unified API also makes it easier to run A/B comparisons across providers, control budgets, and onboard new contributors without handing out credentials for each separate service.