Langchain Chat Websocket
Streaming chat responses over websockets with LangChain LLMs
Pricing
Free tier
Flat rate
Adoption
↘CoolingLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is Langchain Chat Websocket?
Langchain Chat Websocket enables real-time streaming of chat responses from LangChain language models via websockets, enhancing interactive applications.
Key differentiator
“Langchain Chat Websocket stands out by providing real-time streaming capabilities directly from LangChain models over websockets, offering an efficient way for developers to integrate interactive AI chat features into their applications.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Official docs lack examples of complex configurations and error handling
Websocket connections can become unstable with more than 100 concurrent users in testing
Fit analysis
Who is it for?
✓ Best for
Teams building interactive web applications with real-time chat features
Projects requiring low-latency interaction between users and language models
Developers who prefer self-hosted solutions for better control over data
✕ Not a fit for
Applications that require extremely high throughput without latency considerations
Use cases where a managed service is preferred to avoid self-hosting complexities
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Next step
Get Started with Langchain Chat Websocket
Step-by-step setup guide with code examples and common gotchas.