OpenRouter 是统一的 LLM API 聚合网关，一个 API Key 即可访问 400+ 大模型（OpenAI、Claude、Gemini、DeepSeek、Llama 等），自动路由到性价比最高的模型，并提供统一计费与用量统计。开发者常用它做模型对比、降本与灾备切换，是 2026 年最流行的 AI API 中转站。 🔗 文章: /post/best-free-ai-apis-in-2026-10-providers-compared-for-developers-20260723
OpenRouter is a unified LLM API gateway: one API key accesses 400+ models (OpenAI, Claude, Gemini, DeepSeek, Llama...), auto-routes to the best value model, and provides unified billing and usage stats. Developers use it for model comparison, cost cutting and failover — the most popular AI API aggregator in 2026. 🔗 Article: /post/best-free-ai-apis-in-2026-10-providers-compared-for-developers-20260723