diff --git a/libs/langchain-openai/src/chat_models.ts b/libs/langchain-openai/src/chat_models.ts
index cedb15777527..f2219bd5a5d1 100644
--- a/libs/langchain-openai/src/chat_models.ts
+++ b/libs/langchain-openai/src/chat_models.ts
@@ -956,6 +956,7 @@ export class ChatOpenAI<
     this.openAIApiKey =
       fields?.apiKey ??
       fields?.openAIApiKey ??
+      fields?.configuration?.apiKey ??
       getEnvironmentVariable("OPENAI_API_KEY");
     this.apiKey = this.openAIApiKey;