{"id":202,"date":"2026-03-09T18:23:09","date_gmt":"2026-03-09T18:23:09","guid":{"rendered":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/langchain-vs-llamaindex-vs-haystack-building-produ\/"},"modified":"2026-03-09T22:00:14","modified_gmt":"2026-03-09T22:00:14","slug":"langchain-vs-llamaindex-vs-haystack-building-produ","status":"publish","type":"post","link":"https:\/\/blog.rebalai.com\/ja\/2026\/03\/09\/langchain-vs-llamaindex-vs-haystack-building-produ\/","title":{"rendered":"LangChain vs LlamaIndex vs Haystack: 2026\u5e74\u672c\u756aRAG\u30672\u9031\u9593\u4f7f\u3044\u6bd4\u3079\u305f"},"content":{"rendered":"<p>3\u3064\u5168\u90e8\u4f5c\u3063\u305f\u30022\u9031\u9593\u3001\u540c\u3058RAG\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u5404\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u5b9f\u88c5\u3057\u305f\u3002<\/p>\n<p>\u3046\u3061\u306e\u30c1\u30fc\u30e0\u306f\u50d5\u3092\u542b\u3081\u30664\u4eba\u3067\u3001\u793e\u5185\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u691c\u7d22\u30b7\u30b9\u30c6\u30e0\u3092\u672c\u756a\u306b\u8f09\u305b\u3088\u3046\u3068\u3057\u3066\u3044\u305f\u3002Confluence\u306e\u30da\u30fc\u30b8\u304c\u7d048,000\u679a\u3001\u65e5\u672c\u8a9e\u3068\u82f1\u8a9e\u304c\u6df7\u5728\u3057\u3066\u308b\u3084\u3064\u3002\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u9078\u5b9a\u3067\u300cLangChain\u304c\u4e00\u756a\u30e1\u30b8\u30e3\u30fc\u3060\u304b\u3089\u300d\u3068\u3044\u3046\u58f0\u3082\u3042\u3063\u305f\u3051\u3069\u3001\u305d\u308c\u3060\u3051\u3067\u6c7a\u3081\u305f\u304f\u306a\u304b\u3063\u305f\u3002\u3068\u3044\u3046\u304b\u30012024\u5e74\u306b\u5225\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067LangChain\u3092\u4f7f\u3063\u3066\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u9593\u306e\u975e\u4e92\u63db\u3067\u6ce3\u3044\u305f\u7d4c\u9a13\u304c\u3042\u3063\u305f\u306e\u3067\u3002<\/p>\n<p>\u3060\u304b\u3089\u6bd4\u8f03\u3057\u305f\u3002\u3053\u308c\u306f\u305d\u306e\u8a18\u9332\u3002<\/p>\n<h2>\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u521d\u65e5\u306e\u89e3\u50cf\u5ea6\u3067\u898b\u3048\u3066\u304f\u308b\u3053\u3068<\/h2>\n<p>LangChain\uff08v0.3.x\u7cfb\uff09\u304b\u3089\u59cb\u3081\u305f\u3002\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f\u8c4a\u5bcc\u3060\u3057\u3001\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3082\u5927\u91cf\u306b\u3042\u308b\u3002\u3067\u3082\u2014\u2014\u6700\u521d\u306b\u3076\u3064\u304b\u3063\u305f\u306e\u304c\u300c\u3069\u308c\u304c\u4eca\u306e\u6b63\u89e3\u306a\u66f8\u304d\u65b9\u304b\u300d\u554f\u984c\u3060\u3063\u305f\u3002\u691c\u7d22\u3059\u308b\u3068\u53e4\u3044Chain\u30d9\u30fc\u30b9\u306e\u30b3\u30fc\u30c9\u3068LCEL\uff08LangChain Expression Language\uff09\u30d9\u30fc\u30b9\u306e\u30b3\u30fc\u30c9\u304c\u6df7\u5728\u3057\u3066\u3044\u3066\u3001Stack Overflow\u3067\u898b\u3064\u3051\u305f\u30b3\u30fc\u30c9\u3092\u305d\u306e\u307e\u307e\u5b9f\u884c\u3057\u305f\u3089<code>DeprecationWarning<\/code>\u304c5\u3064\u51fa\u305f\u3002\u305d\u308c\u81ea\u4f53\u306f\u5927\u3057\u305f\u554f\u984c\u3058\u3083\u306a\u3044\u3051\u3069\u3001\u6df7\u4e71\u3059\u308b\u3002v0.1\u304b\u3089v0.2\u3001v0.3\u3068\u7d9a\u3044\u305f\u79fb\u884c\u306e\u50b7\u8de1\u304c\u3042\u3061\u3053\u3061\u306b\u6b8b\u3063\u3066\u308b\u3002<\/p>\n<p>LlamaIndex\uff080.11\u7cfb\uff09\u306e\u521d\u65e5\u306f\u5bfe\u7167\u7684\u3060\u3063\u305f\u3002\u30b3\u30f3\u30bb\u30d7\u30c8\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u2014\u2014\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u2192\u30ce\u30fc\u30c9\u2192\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u2192\u30af\u30a8\u30ea\u3001\u3053\u306e\u6d41\u308c\u304c\u5168\u4f53\u3092\u901a\u3057\u3066\u30d6\u30ec\u306a\u3044\u3002<code>VectorStoreIndex.from_documents(docs)<\/code>\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u3063\u3066\u3001<code>index.as_query_engine()<\/code>\u3067\u30a8\u30f3\u30b8\u30f3\u3092\u53d6\u3063\u3066\u3001<code>engine.query(\"\u8cea\u554f\")<\/code>\u3002\u6700\u521d\u306e\u52d5\u304f\u3082\u306e\u304c\u3067\u304d\u308b\u307e\u3067\u304c\u65e9\u304b\u3063\u305f\u3002<\/p>\n<p>Haystack\u306f\u2014\u2014\u6b63\u76f4\u306b\u8a00\u3046\u3068\u2014\u2014\u6700\u521d\u300c\u5730\u5473\u3060\u306a\u300d\u3068\u601d\u3063\u305f\u3002deepset\u88fd\u3067\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f\u60aa\u304f\u306a\u3044\u3093\u3060\u3051\u3069\u3001LangChain\u306e\u3088\u3046\u306a\u71b1\u91cf\u304c\u306a\u3044\u3002GitHub\u306e\u30b9\u30bf\u30fc\u6570\u3082\u6bb5\u9055\u3044\u3002\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306e\u5927\u304d\u3055\u3067\u3044\u3048\u3070\u6bd4\u8f03\u306b\u306a\u3089\u306a\u3044\u3002<\/p>\n<p>\u3067\u3082\u4f7f\u3044\u59cb\u3081\u3066\u6570\u6642\u9593\u5f8c\u306b\u3001\u3053\u306e\u300c\u5730\u5473\u3055\u300d\u306e\u610f\u5473\u304c\u5c11\u3057\u308f\u304b\u3063\u3066\u304d\u305f\u3002Haystack\u306e\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5165\u51fa\u529b\u304c\u578b\u3067\u660e\u793a\u7684\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3002\u63a5\u7d9a\u304c\u9593\u9055\u3063\u3066\u3044\u305f\u3089\u3059\u3050\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u3002\u66d6\u6627\u3055\u304c\u306a\u3044\u3002\u6700\u521d\u306f\u9762\u5012\u306b\u611f\u3058\u308b\u3051\u3069\u3001\u5f8c\u3005\u30c7\u30d0\u30c3\u30b0\u3059\u308b\u3068\u304d\u306b\u52b9\u3044\u3066\u304f\u308b\u2014\u2014\u3053\u308c\u3001\u6700\u521d\u306b\u898b\u3048\u308b\u30b3\u30b9\u30c8\u3058\u3083\u306a\u3044\u3002<\/p>\n<h2>\u540c\u3058\u8cea\u554f20\u554f\u30923\u3064\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u6295\u3052\u305f\u7d50\u679c<\/h2>\n<p>\u691c\u7d22\u54c1\u8cea\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u300120\u554f\u3092\u7528\u610f\u3057\u305f\u3002\u3088\u304f\u3042\u308b\u8cea\u554f\u304b\u3089\u3001\u8907\u6570\u30da\u30fc\u30b8\u306b\u307e\u305f\u304c\u308b\u60c5\u5831\u304c\u5fc5\u8981\u306a\u3082\u306e\u307e\u3067\u3002<\/p>\n<p>LangChain\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\uff08RecursiveCharacterTextSplitter\u3001\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba1000\u3001\u30aa\u30fc\u30d0\u30fc\u30e9\u30c3\u30d7200\uff09\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306aQA\u306b\u306f\u60aa\u304f\u306a\u3044\u3002\u3067\u3082\u8907\u6570\u30da\u30fc\u30b8\u306b\u307e\u305f\u304c\u308b\u30c6\u30fc\u30d6\u30eb\u3084\u7b87\u6761\u66f8\u304d\u304c\u9014\u4e2d\u3067\u5207\u308c\u308b\u554f\u984c\u304c\u983b\u767a\u3057\u305f\u3002\u7279\u306b\u4ed5\u69d8\u66f8\u7cfb\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u56de\u7b54\u7cbe\u5ea6\u304c\u843d\u3061\u305f\u3002\u6539\u5584\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30ab\u30b9\u30bf\u30e0\u306eText Splitter\u3092\u66f8\u304f\u304b\u3001\u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u3092\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3059\u308b\u3057\u304b\u306a\u3044\u2014\u2014\u3064\u307e\u308a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u307e\u307e\u3067\u306f\u672c\u756a\u54c1\u8cea\u306b\u81f3\u3089\u306a\u3044\u3002<\/p>\n<p>LlamaIndex\u306f<code>SentenceSplitter<\/code>\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5165\u3063\u3066\u3044\u3066\u3001\u6587\u8108\u3092\u3088\u308a\u8ce2\u304f\u4fdd\u6301\u3057\u3066\u304f\u308c\u308b\u5370\u8c61\u304c\u3042\u3063\u305f\u300220\u554f\u306e\u8a55\u4fa1\u3067\u306f14\u554f\u3067LlamaIndex\u306e\u56de\u7b54\u306e\u65b9\u304c\u300c\u5177\u4f53\u7684\u3060\u3063\u305f\u300d\u3002\u305f\u3060\u2014\u2014\u3053\u308c\u306f\u6b63\u76f4\u306a\u3068\u3053\u308d\u2014\u2014\u3046\u3061\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u69cb\u9020\u5316\u3055\u308c\u3066\u308b\u305b\u3044\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u30de\u30fc\u30af\u30c0\u30a6\u30f3\u306e\u30c6\u30fc\u30d6\u30eb\u3084\u898b\u51fa\u3057\u69cb\u9020\u304c\u591a\u3044\u4ed5\u69d8\u66f8\u304c\u4e2d\u5fc3\u3060\u3063\u305f\u306e\u3067\u3001\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u3088\u3063\u3066\u5dee\u306f\u5909\u308f\u308b\u3068\u601d\u3046\u3002<\/p>\n<p>Haystack\u3067\u4e88\u60f3\u5916\u3060\u3063\u305f\u306e\u304c\u3001\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u691c\u7d22\u306e\u5b9f\u88c5\u30b3\u30b9\u30c8\u306e\u4f4e\u3055\u3060\u3063\u305f\u3002BM25\u3068\u30d9\u30af\u30c8\u30eb\u691c\u7d22\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3044\u5834\u5408\u3001LangChain\u3060\u3068<code>EnsembleRetriever<\/code>\u3092\u81ea\u5206\u3067\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002LlamaIndex\u3082<code>CustomRetriever<\/code>\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u3067\u3082Haystack\u3067\u306f:<\/p>\n<pre><code class=\"language-python\">from haystack import Pipeline\nfrom haystack.components.retrievers import InMemoryBM25Retriever, InMemoryEmbeddingRetriever\nfrom haystack.components.joiners import DocumentJoiner\n\npipeline = Pipeline()\npipeline.add_component(&quot;bm25&quot;, InMemoryBM25Retriever(document_store=doc_store))\npipeline.add_component(&quot;embedding&quot;, InMemoryEmbeddingRetriever(document_store=doc_store))\npipeline.add_component(&quot;joiner&quot;, DocumentJoiner(join_mode=&quot;reciprocal_rank_fusion&quot;))\n\npipeline.connect(&quot;bm25.documents&quot;, &quot;joiner.documents&quot;)\npipeline.connect(&quot;embedding.documents&quot;, &quot;joiner.documents&quot;)\n# \u3042\u3068\u306fpipeline.run()\u3059\u308b\u3060\u3051\n<\/code><\/pre>\n<p>\u3053\u308c\u304c\u52d5\u3044\u305f\u3068\u304d\u3001\u300c\u3042\u3001\u8003\u3048\u3066\u8a2d\u8a08\u3055\u308c\u3066\u308b\u306a\u300d\u3068\u601d\u3063\u305f\u3002\u65e5\u672c\u8a9e\u306e\u3088\u3046\u306b\u5f62\u614b\u7d20\u89e3\u6790\u304c\u91cd\u8981\u306a\u8a00\u8a9e\u3067\u306f\u3001BM25\u3068\u30d9\u30af\u30c8\u30eb\u306e\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u306f\u7279\u306b\u6709\u52b9\u3067\u3001\u305d\u306e\u5b9f\u88c5\u304c\u3053\u308c\u3060\u3051\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u306f\u6b63\u76f4\u9a5a\u3044\u305f\u3002<\/p>\n<h2>\u91d1\u66dc\u5348\u5f8c\u306b\u30c7\u30d7\u30ed\u30a4\u3057\u3066\u6708\u66dc\u671d\u306b\u58ca\u308c\u305f\u8a71<\/h2>\n<p>\u3053\u308c\u306f\u81ea\u5206\u306e\u5931\u6557\u8ac7\u3068\u3057\u3066\u66f8\u3044\u3066\u304a\u304f\u3002<\/p>\n<p>LangChain\u30d9\u30fc\u30b9\u306e\u5b9f\u88c5\u3092\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u304b\u3089\u672c\u756a\u306b\u6607\u683c\u3055\u305b\u305f\u306e\u304c\u91d1\u66dc\u306e\u5348\u5f8c\u3002\u9031\u672b\u306f\u30a2\u30af\u30bb\u30b9\u304c\u5c11\u306a\u3044\u306e\u3067\u554f\u984c\u304c\u898b\u3048\u306a\u304b\u3063\u305f\u3002\u6708\u66dc\u306e\u671d\u306bSlack\u3067\u300c\u691c\u7d22\u304c\u9045\u3044\u300d\u3068\u3044\u3046\u5831\u544a\u304c\u6765\u305f\u3002P99\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u898b\u308b\u30688\u79d2\u3092\u8d85\u3048\u3066\u3044\u305f\u3002\u5e73\u5747\u3067\u30823.5\u79d2\u3002\u666e\u901a\u306b\u4f7f\u3048\u308b\u30ec\u30d9\u30eb\u3058\u3083\u306a\u3044\u3002<\/p>\n<p>\u539f\u56e0\u3092\u8ffd\u3046\u3068\u3001\u57cb\u3081\u8fbc\u307f\u30e2\u30c7\u30eb\u306e\u547c\u3073\u51fa\u3057\u3068LLM\u306e\u547c\u3073\u51fa\u3057\u304c\u76f4\u5217\u306b\u306a\u3063\u3066\u3044\u305f\u3002LangChain\u306eLCEL\u306f<code>RunnableParallel<\/code>\u3092\u4f7f\u3048\u3070\u4e26\u5217\u5b9f\u884c\u3067\u304d\u308b\u3002\u3067\u3082\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u76f4\u5217\u3067\u3001\u77e5\u3089\u306a\u3044\u3068\u30cf\u30de\u308b\u2014\u2014\u3068\u3044\u3046\u304b\u50d5\u304c\u30cf\u30de\u3063\u305f\u3002<\/p>\n<pre><code class=\"language-python\"># \u3084\u308a\u304c\u3061\u306a\u66f8\u304d\u65b9\uff08\u76f4\u5217\u5b9f\u884c\u306b\u306a\u308b\uff09\nchain = retriever | prompt | llm | output_parser\n\n# \u4e26\u5217\u3067\u51e6\u7406\u3057\u305f\u3044\u5834\u5408\u306f\u3053\u3046\u66f8\u304f\nfrom langchain_core.runnables import RunnableParallel, RunnablePassthrough\n\nchain = (\n    RunnableParallel({&quot;context&quot;: retriever, &quot;question&quot;: RunnablePassthrough()})\n    | prompt\n    | llm\n    | output_parser\n)\n<\/code><\/pre>\n<p>LlamaIndex\u306f\u3053\u306e\u70b9\u3067\u3088\u308a\u81ea\u7136\u306b\u975e\u540c\u671f\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3002<code>engine = index.as_query_engine()<\/code>\u3067\u53d6\u3063\u305f\u30a8\u30f3\u30b8\u30f3\u306b\u5bfe\u3057\u3066<code>await engine.aquery(\"\u8cea\u554f\")<\/code>\u3067\u975e\u540c\u671f\u30af\u30a8\u30ea\u304c\u3067\u304d\u3066\u3001FastAPI\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u7d20\u76f4\u306b\u53ce\u307e\u308b\u3002\u3046\u3061\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304c\u5168\u90e8async\u30d9\u30fc\u30b9\u3060\u3063\u305f\u306e\u3067\u3001\u3053\u308c\u304c\u5f8c\u306e\u6c7a\u3081\u624b\u306e\u3072\u3068\u3064\u306b\u306a\u3063\u305f\u3002<\/p>\n<p>Haystack\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u3064\u3044\u3066\u306f\u2014\u2014\u3053\u3053\u304c\u6b63\u76f4\u4e00\u756a\u8a00\u3044\u306b\u304f\u3044\u3093\u3060\u3051\u3069\u2014\u2014\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u63a5\u7d9a\u30df\u30b9\u3067\u51fa\u308b\u30a8\u30e9\u30fc\u304c\u3001\u539f\u56e0\u304c\u3069\u3053\u306b\u3042\u308b\u306e\u304b\u3059\u3050\u308f\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u3002\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u304c\u8907\u96d1\u306b\u306a\u3063\u3066\u304f\u308b\u3068\u7279\u306b\u3002<code>pipeline.draw()<\/code>\u3067\u53ef\u8996\u5316\u3067\u304d\u308b\u306e\u306f\u4fbf\u5229\u3060\u3051\u3069\u3001Graphviz\u304c\u5fc5\u8981\u3067\u74b0\u5883\u306b\u3088\u3063\u3066\u306f\u305d\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u304c\u5730\u5473\u306b\u9762\u5012\u3060\u3063\u305f\u3002<\/p>\n<h2>LangSmith\u306f\u4fbf\u5229\u3001\u3067\u3082\u305d\u308c\u3067\u5168\u90e8\u89e3\u6c7a\u3059\u308b\u308f\u3051\u3058\u3083\u306a\u3044<\/h2>\n<p>\u672c\u756aRAG\u3067\u898b\u843d\u3068\u3055\u308c\u304c\u3061\u306a\u306e\u304c\u300c\u306a\u305c\u3053\u306e\u56de\u7b54\u304c\u51fa\u305f\u306e\u304b\u300d\u3092\u5f8c\u304b\u3089\u8ffd\u3048\u308b\u304b\u3069\u3046\u304b\u3060\u3002\u3069\u306e\u30c1\u30e3\u30f3\u30af\u304c\u53d6\u5f97\u3055\u308c\u305f\u304b\u3001\u30d7\u30ed\u30f3\u30d7\u30c8\u306e\u4e2d\u8eab\u306f\u4f55\u3060\u3063\u305f\u304b\u3001\u3069\u3053\u3067\u3069\u308c\u3060\u3051\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u304b\u2014\u2014\u3053\u308c\u304c\u898b\u3048\u306a\u3044\u3068\u969c\u5bb3\u5bfe\u5fdc\u304c\u3064\u3089\u3044\u3002<\/p>\n<p>LangChain\u306fLangSmith\u3068\u306e\u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u4fbf\u5229\u3060\u3063\u305f\u3002\u74b0\u5883\u5909\u6570\u30922\u3064\u8a2d\u5b9a\u3059\u308b\u3060\u3051\u3067\u30c8\u30ec\u30fc\u30b7\u30f3\u30b0\u304c\u52d5\u304f\u3002<\/p>\n<pre><code class=\"language-python\">import os\nos.environ[&quot;LANGCHAIN_TRACING_V2&quot;] = &quot;true&quot;\nos.environ[&quot;LANGCHAIN_API_KEY&quot;] = &quot;ls__your-api-key&quot;\nos.environ[&quot;LANGCHAIN_PROJECT&quot;] = &quot;rag-prod-2026&quot;\n\n# \u3053\u308c\u3060\u3051\u3067\u5168\u30c1\u30a7\u30fc\u30f3\u306e\u5b9f\u884c\u304c\u30c8\u30ec\u30fc\u30b9\u3055\u308c\u308b\nresult = chain.invoke({&quot;question&quot;: &quot;\u3053\u306e\u4ed5\u69d8\u66f8\u306e\u8a8d\u8a3c\u30d5\u30ed\u30fc\u306f?&quot;})\n<\/code><\/pre>\n<p>UI\u3082\u898b\u3084\u3059\u3044\u3057\u3001\u5404\u30b9\u30c6\u30c3\u30d7\u306e\u5b9f\u884c\u6642\u9593\u3084LLM\u3078\u306e\u5165\u51fa\u529b\u304c\u5168\u90e8\u78ba\u8a8d\u3067\u304d\u308b\u3002\u305f\u3060\u3057\u6709\u6599\u3002\u30c1\u30fc\u30e0\u306e\u30b5\u30a4\u30ba\u306b\u3088\u3063\u3066\u306f\u6708\u984d\u30b3\u30b9\u30c8\u304c\u7121\u8996\u3067\u304d\u306a\u304f\u306a\u308b\u3002<\/p>\n<p>LlamaIndex\u306fArize Phoenix\u3084OpenTelemetry\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3001\u30d9\u30f3\u30c0\u30fc\u30ed\u30c3\u30af\u30a4\u30f3\u3092\u907f\u3051\u305f\u3044\u30c1\u30fc\u30e0\u306b\u306f\u5411\u3044\u3066\u308b\u3002\u3046\u3061\u306f\u6700\u7d42\u7684\u306bArize Phoenix\u3092\u30bb\u30eb\u30d5\u30db\u30b9\u30c8\u3057\u3066\u308b\u3002S3\u306b\u30c8\u30ec\u30fc\u30b9\u3092\u5410\u3044\u3066Grafana\u3067\u898b\u308b\u69cb\u6210\u306b\u3057\u305f\u3002\u521d\u671f\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306b\u306f\u305d\u308c\u306a\u308a\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u3051\u3069\u3001LangSmith\u306eSaaS\u306b\u4f9d\u5b58\u3057\u305f\u304f\u306a\u304b\u3063\u305f\u3002\u6b63\u76f4\u3001\u3053\u306e\u9078\u629e\u306f\u6b63\u89e3\u3060\u3063\u305f\u3068\u601d\u3063\u3066\u308b\u3002<\/p>\n<p>Haystack\u306f<code>Pipeline.run()<\/code>\u304c\u8a73\u7d30\u306a\u4e2d\u9593\u7d50\u679c\u3092\u8fd4\u3059\u306e\u3067\u3001\u30ed\u30b0\u306b\u5410\u3051\u3070\u3042\u308b\u7a0b\u5ea6\u8ffd\u3048\u308b\u3002\u3067\u3082\u305d\u308c\u3060\u3051\u3067\u672c\u756a\u3092\u898b\u308b\u306e\u306f\u53b3\u3057\u3044\u3002OpenTelemetry\u306e\u30b5\u30dd\u30fc\u30c8\u306f\u3042\u308b\u3051\u3069\u3001\u300c\u3059\u3050\u4f7f\u3048\u308bUI\u300d\u306fLangSmith\u307b\u3069\u6574\u3063\u3066\u3044\u306a\u3044\u2014\u2014\u3053\u308c\u306fHaystack\u306e\u660e\u78ba\u306a\u5f31\u70b9\u3002<\/p>\n<h2>\u3067\u3001\u5b9f\u969b\u3069\u308c\u3092\u9078\u3093\u3060\u304b<\/h2>\n<p><strong>\u3046\u3061\u306e\u9078\u629e\u306fLlamaIndex\u3060\u3063\u305f\u3002<\/strong><\/p>\n<p>\u7406\u7531\u306f3\u70b9\u91cd\u306a\u3063\u305f\u300220\u554f\u4e2d14\u554f\u3067\u691c\u7d22\u54c1\u8cea\u304c\u826f\u304b\u3063\u305f\u3002\u975e\u540c\u671f\u5bfe\u5fdc\u304cFastAPI\u3068\u7d20\u76f4\u306b\u565b\u307f\u5408\u3063\u305f\u3002\u30c1\u30fc\u30e0\u30e1\u30f3\u30d0\u30fc\u304c\u8aad\u3093\u3067\u30b3\u30f3\u30bb\u30d7\u30c8\u3092\u7406\u89e3\u3057\u3084\u3059\u304b\u3063\u305f\u3002<\/p>\n<p>LangChain\u306f\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u304c\u4e00\u756a\u5e83\u3044\u3002\u3053\u308c\u306f\u4e8b\u5b9f\u3067\u3001\u5426\u5b9a\u3057\u306a\u3044\u3002\u7d71\u5408\u3067\u304d\u308b\u30c4\u30fc\u30eb\u306e\u6570\u306f\u30c0\u30f3\u30c8\u30c4\u3060\u3057\u3001\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u7cfb\u306e\u6a5f\u80fd\u306fLangChain\u304c\u4e00\u756a\u5145\u5b9f\u3057\u3066\u308b\u3002\u3067\u3082\u300cRAG\u3092\u3061\u3083\u3093\u3068\u672c\u756a\u3067\u52d5\u304b\u3059\u300d\u3068\u3044\u3046\u76ee\u7684\u306b\u7d5e\u308b\u3068\u3001\u62bd\u8c61\u5316\u304c\u591a\u3059\u304e\u3066\u4f55\u304c\u8d77\u304d\u3066\u308b\u304b\u308f\u304b\u308a\u306b\u304f\u3044\u5834\u9762\u304c\u4f55\u5ea6\u3082\u3042\u3063\u305f\u3002\u30d0\u30fc\u30b8\u30e7\u30f3\u9593\u306e\u975e\u4e92\u63db\u306e\u554f\u984c\u3082\u7d99\u7d9a\u3057\u3066\u3042\u308b\u30022024\u5e74\u306b\u75db\u3044\u76ee\u3092\u898b\u305f\u306e\u304c\u3001\u307e\u3060\u5c11\u3057\u982d\u306b\u6b8b\u3063\u3066\u308b\u3002<\/p>\n<p>Haystack\u306b\u95a2\u3057\u3066\u306f\u2014\u2014\u3053\u308c\u304c\u4e00\u756a\u610f\u5916\u306a\u8a55\u4fa1\u306b\u306a\u308b\u3093\u3060\u3051\u3069\u2014\u2014\u672c\u756a\u3067\u306e\u4fe1\u983c\u6027\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u30013\u3064\u306e\u4e2d\u3067\u4e00\u756a\u771f\u5263\u306b\u8a2d\u8a08\u3055\u308c\u3066\u308b\u3068\u601d\u3046\u3002\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u660e\u793a\u6027\u3001\u578b\u4ed8\u304d\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3001\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u691c\u7d22\u306e\u3057\u3084\u3059\u3055\u3002deepset\u306f\u4f01\u696d\u5411\u3051SaaS\u3082\u63d0\u4f9b\u3057\u3066\u3044\u3066\u3001\u672c\u756a\u3067\u52d5\u304b\u3059\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u3066\u8003\u3048\u3066\u308b\u306e\u304c\u30b3\u30fc\u30c9\u8a2d\u8a08\u306b\u51fa\u3066\u308b\u3002\u30c1\u30fc\u30e0\u304c10\u4eba\u4ee5\u4e0a\u3044\u3066ML\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u5c02\u4efb\u3067\u3044\u3066\u3001\u304b\u3064OSS\u3067\u672c\u756a\u3092\u52d5\u304b\u3057\u305f\u3044\u306a\u3089\u3001Haystack\u306f\u771f\u5263\u306b\u8a66\u3059\u4fa1\u5024\u304c\u3042\u308b\u3002<\/p>\n<p>\u305f\u3060\u3057\u2014\u2014\u65e5\u672c\u8a9e\u306e\u60c5\u5831\u304c\u5727\u5012\u7684\u306b\u5c11\u306a\u3044\u3002\u8a70\u307e\u3063\u305f\u3068\u304d\u306b\u3059\u3050\u7b54\u3048\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u30024\u4eba\u30c1\u30fc\u30e0\u3067\u5168\u54e1\u304cHaystack\u306b\u6163\u308c\u3066\u3044\u306a\u3044\u72b6\u614b\u3067\u9032\u3081\u308b\u306e\u306f\u3001\u73fe\u5b9f\u554f\u984c\u3068\u3057\u3066\u30ea\u30b9\u30af\u3060\u3068\u5224\u65ad\u3057\u305f\u3002\u3053\u308c\u304c\u6c7a\u3081\u624b\u306e\u3072\u3068\u3064\u3060\u3063\u305f\u3001\u3068\u3044\u3046\u306e\u306f\u6b63\u76f4\u306b\u8a00\u3063\u3066\u304a\u304d\u305f\u3044\u3002\u6280\u8853\u7684\u306a\u512a\u52a3\u3060\u3051\u3067\u9078\u3079\u306a\u3044\u5834\u9762\u306f\u5b9f\u969b\u306b\u3042\u308b\u3002<\/p>\n<p>\u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u3092\u65e9\u304f\u4f5c\u3063\u3066\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u3092\u6d3b\u7528\u3057\u305f\u3044\u306a\u3089LangChain\u3001\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304casync\u3067\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u691c\u7d22\u306eRAG\u3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Reviewed: 2026-03-10 | Status: ready_to_publish | Changes: tightened parallel paragraph structures; corrected LlamaIndex async API reference (index\u2192engine.aquery); removed redundant sentence in LlamaIndex quality section; added one opinion line in Haystack conclusion; minor rhythm fixes throughout --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>3\u3064\u5168\u90e8\u4f5c\u3063\u305f\u30022\u9031\u9593\u3001\u540c\u3058RAG\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u5404\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u5b9f\u88c5\u3057\u305f\u3002 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