LangChain Changelog

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July 2024

🗣️ Rate limiting for any chat model

LangChain has a built-in memory rate limiter that can help you avoid exceeding the maximum rate of requests allowed by the chat model provider. You can now...

🔎 Filtering runs within the trace view

You can now filter for runs within the trace view in LangSmith. This is especially helpful for long-running agents, which can produce traces with hundreds,...

🔑 Enhanced Key-Value Search: Matching inputs and outputs

Users can now filter traces or runs by JSON key-value pair in inputs or outputs. This creates a more powerful search experience in LangSmith, as you can...

🪄 Initialize any model in one line of code

LangChain has a lot of chat model integrations, and it can be hard to remember how to import each. To make things simple, we've added a universal model...

🔧 Improved core tool interfaces and docs to simplify tool integration, handle diverse inputs, and return complex inputs

We've improved our core tool interfaces and docs to simplify tool integrations and better handle diverse inputs, plus return complex outputs. These...

🪝 Webhook notifications for run rules

We now allow for the configuration of headers per webhook URL (stored in an encrypted format). When you add a webhook URL on an automation action in...

⚓ Enhanced state management & retries in LangGraph Python

For the LangGraph Python library, we've added:

🛝 Build prompts faster and compare in LangSmith Playground

No more juggling tabs or context-switching — you can now compare multiple prompts and model configurations side-by-side in LangSmith's Playground. Build,...

🇪🇺 EU Data Residency for LangSmith

We're excited to offer EU data residency to LangSmith customers on all plan tiers, at no extra cost. You can now choose to host your data in the EU (instead...

💬 Improved message handling, checkpointing of pending writes, and metadata rendering

We've made several improvements to the open-source LangGraph library:

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