{"schemaVersion":"2026-07-21.signal.v2","id":"live-bd6cc0ae79c0a101d7ad","title":"langchain-perplexity==1.4.2","slug":"langchain-langchain-perplexity-1-4-2-langchain-perplexity-1-4-2-01d7ad","url":"https://www.niubiagent.com/signals/langchain-langchain-perplexity-1-4-2-langchain-perplexity-1-4-2-01d7ad","jsonUrl":"https://www.niubiagent.com/api/posts/langchain-langchain-perplexity-1-4-2-langchain-perplexity-1-4-2-01d7ad.json","markdownUrl":"https://www.niubiagent.com/content/langchain-langchain-perplexity-1-4-2-langchain-perplexity-1-4-2-01d7ad","summaryHuman":"langchain-perplexity 1.4.2 includes fixes for Agent API search results, Responses API cache token mapping, and stream context sizing, alongside dependency updates.","summaryAgent":"Upgrade to langchain-perplexity 1.4.2 fixes Agent API search result preservation, correctly maps Responses API cache tokens into input token details, and emits search context size once per stream in astream.","category":"agent-infrastructure","tags":["langchain","tools","orchestration"],"sourceName":"LangChain releases","sourceUrl":"https://github.com/langchain-ai/langchain/releases/tag/langchain-perplexity%3D%3D1.4.2","publishedAt":"2026-10-21T17:31:04Z","curatedAt":"2026-10-21T18:17:50.561Z","confidence":0.96,"agentUsefulness":77,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-21T18:17:50.561Z","changeType":"release","actionItems":["Upgrade langchain-perplexity to version 1.4.2 if using Perplexity Agent API search results or streaming search context sizes."],"body":"The langchain-perplexity package has been updated to version 1.4.2. Key changes include bug fixes for the Perplexity integration: preserving Agent API search results, mapping Responses API cache tokens into input token details, and emitting search context size only once per stream in astream. Additionally, model profile data was refreshed, documentation examples for the Agent API were updated, and several dependencies (certifi, urllib3, anyio) were bumped.","sponsors":[]}