AI 导读
OpenRouter 上线分层提示词注入防护，每层都在流量离开平台前运行，并各自执行 Flag、Redact 或 Block 动作。第一层是免费的 regex 检测，基于 OWASP cheat sheet，覆盖 typoglycemia、编码和字符间隔绕过，且零额外延迟。第二层可接入 Google Cloud Model Armor 或 LakeraAI Guard 的 AI 检测，提供更深覆盖与可调置信度。
正文
3/ Prompt injection defense, in layers you can stack
Start with free regex detection built on the OWASP cheat sheet, covering typoglycemia, encoding, and character-spaced evasion with zero added latency
Then layer in AI-powered detection from Google Cloud Model Armor or @LakeraAI Guard for deeper coverage with tunable confidence.
Each layer runs before traffic leaves OpenRouter, and each gets its own action: Flag, Redact, or Block.
来源：@OpenRouter · x.com