The original title is: "Your AI Gateway's 200 OK Is Lying to You — A Practical Guide to Response Validation"

Short summary

HTTP 200 from LLM gateways only confirms transport success, not content correctness. When failover to backup providers, implement response contracts to validate required fields, detect hallucinations, and catch logical contradictions. This validation layer (45µs overhead) belongs in the gateway proxy, not the application.

• •HTTP 200 doesn't guarantee correct LLM response content
• •Add response contract validation to catch hallucinations and contradictions
• •Implement at gateway level for zero application changes

Generated with AI, which can make mistakes.