I Ripped Out LangChain. My Stack Got Faster.

Description

LangChain is dead in my stack. After three years of shipping production RAG on it, I ripped it out. Three libraries replaced it — and the codebase got simpler, faster, and easier to debug. Here's the 2026 replacement stack and why the community is moving on. Tools mentioned: • Instructor (github.com/567-labs/instructor) — 3M+ downloads, Pydantic-based structured outputs • PydanticAI — from the Pydantic team, type-system-first agent framework • Raw Anthropic + OpenAI SDKs — tool calling, structured outputs, vision, all native now The pattern shift: LLM output is not program output. It's untrusted user input. #Shorts #LangChain #AI #AIEngineering #Python #LLM Related: I Was Burning Money on Claude: https://youtube.com/shorts/E3SMDkayUF8 Wasting 80% of Claude Tokens: https://youtube.com/shorts/XuTOOo_AQbM Claude Code Secret Feature: https://youtube.com/shorts/_LqNuejPJB4