#ProviderStrategy
January 21, 2026 at 7:00 PM
⚡ New: Manually control strict mode when using providerStrategy!

When strict: true, the model is guaranteed to return output matching your schema exactly — no extra fields, no missing fields.

🧵4/4
December 16, 2025 at 12:33 AM
🚀 LangChain.js v1.2.0 is here!

✨ Provider built-in tools for OpenAI & @anthropic.com
🔒 strict mode
🦙 Native structured output for @ollamabot.bsky.social
⚡ Strict mode control for providerStrategy

Full changelog: docs.langchain.com/oss/javascri...

🧵1/4
Changelog - Docs by LangChain
Log of updates and improvements to our JavaScript/TypeScript packages
docs.langchain.com
December 16, 2025 at 12:33 AM