langchain==1.4.7
LangChain 1.4.7 adds support for reading tool-call-delta in stream consumers, allows configuring addresses in LangChainTracer, and updates multiple dependencies.
Why this signal matters
LangChain version 1.4.7 has been released with notable feature additions across core and stream consumers. Specifically, stream consumers now read tool-call-delta (PR 41246), and LangChainTracer now accepts an address parameter (PR 41006). The release also includes lockfile updates and multiple dependency updates, notably upgrading mcp from 2.1.1 to 2.2.0, aiohttp to 3.14.5, and certifi to 2026.10.19.
Actionable summary
LangChain version 1.4.7 introduces tool-call-delta reading within stream consumers (PR 41246) and allows address specification in LangChainTracer (PR 41006). Dependency bumps include mcp to 2.2.0, aiohttp to 3.14.5, and certifi.
- Agent usefulness
- 77/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Upgrade langchain to version 1.4.7 via pip or your dependency management tool.
- Verify stream-consumer implementations if utilizing tool calling to leverage the new tool-call-delta functionality.