OpenRouter 提供免费 API — 通过一个端点访问 GPT-4、Claude、Llama 及 200 多个 AI 模型

OpenRouter is a unified API gateway that provides access to over 200 AI models from OpenAI, Anthropic, Google, Meta, Mistral, and more, all through a single OpenAI-compatible endpoint. The platform offers a free tier, with some models available at no cost and no credit card required to start. Key advantages of OpenRouter include one API for over 200 models, several free models, OpenAI-compatible code switching, automatic fallback in case of provider downtime, and price comparison across providers. Users can easily switch between different AI models, ensuring support even during service interruptions.