AI幻覚低減手法。RAG(Retrieval Augmented Generation)・Citation/Source linking(Perplexity AI/You.com)・Self-Consistency・Chain-of-Verification(CoVe・Meta)・REALM/Self-RAG・Confidence threshold・Temperature 0-0.3・Structured Output(JSON Schema)・Constrained decoding・Guardrails(NeMo Guardrails・Guardrails AI)・Anthropic Opus 4.7 27% hallucination・GPT-5 25%・Claude reliance 最小化設計・2026年Production必須対策。