In the news
Building Production Agents with Jev and LangGraph
LangChain · Published · 3 min read
In 30 seconds
- What happened
- TypeSafe released Jev, a decision model for structured choices that runs 200x faster and 400x cheaper than frontier LLMs on narrow tasks.
- Why it matters
- Matters for engineers building agents or workflows that need fast classification, routing, or judgment calls on constrained action spaces.
- Watch out
- Jev handles bounded decisions but still escalates open-ended reasoning to LLMs. It requires LangGraph or similar orchestration to route decisions reliably.
- agent
The patterns behind this
- Code as Action (CodeAct)
- Agentic Context Engineering (Evolving Playbook)
- Structured Reflection (Think Tool)
Each one covers how the technique works, when it earns its cost, and where it breaks.
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