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LangChain · Class

PromptTemplate

PromptTemplate is a reusable prompt with named variables. Fill the variables to produce a formatted prompt value for a language model.

Last updated

Since
v1.3

Syntax

new PromptTemplate({ inputVariables, template, templateFormat?, validateTemplate? })

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

Subscribe
  • BaseStringPromptTemplate
  • StringPromptValueInterface
  • PromptValue
  • BasePromptTemplate

Source: PromptTemplate | @langchain/core | LangChain Reference. Checked 2026-11-03.