diff --git a/libs/langchain-openai/src/azure/chat_models.ts b/libs/langchain-openai/src/azure/chat_models.ts
index 391d1b98b7e8..c57640627da1 100644
--- a/libs/langchain-openai/src/azure/chat_models.ts
+++ b/libs/langchain-openai/src/azure/chat_models.ts
@@ -266,7 +266,7 @@ export type { AzureOpenAIInput };
  * const Joke = z.object({
  *   setup: z.string().describe("The setup of the joke"),
  *   punchline: z.string().describe("The punchline to the joke"),
- *   rating: z.number().optional().describe("How funny the joke is, from 1 to 10")
+ *   rating: z.number().nullable().describe("How funny the joke is, from 1 to 10")
  * }).describe('Joke to tell user.');
  *
  * const structuredLlm = llm.withStructuredOutput(Joke, { name: "Joke" });
diff --git a/libs/langchain-openai/src/azure/embeddings.ts b/libs/langchain-openai/src/azure/embeddings.ts
index f50e3d2a8212..37e684ede2f4 100644
--- a/libs/langchain-openai/src/azure/embeddings.ts
+++ b/libs/langchain-openai/src/azure/embeddings.ts
@@ -37,10 +37,12 @@ export class AzureOpenAIEmbeddings extends OpenAIEmbeddings {
     this.batchSize = fields?.batchSize ?? 1;
     this.azureOpenAIApiKey =
       fields?.azureOpenAIApiKey ??
+      fields?.apiKey ??
       getEnvironmentVariable("AZURE_OPENAI_API_KEY");
 
     this.azureOpenAIApiVersion =
       fields?.azureOpenAIApiVersion ??
+      fields?.openAIApiVersion ??
       getEnvironmentVariable("AZURE_OPENAI_API_VERSION");
 
     this.azureOpenAIBasePath =
diff --git a/libs/langchain-openai/src/chat_models.ts b/libs/langchain-openai/src/chat_models.ts
index b6da672416fa..98670b1a5278 100644
--- a/libs/langchain-openai/src/chat_models.ts
+++ b/libs/langchain-openai/src/chat_models.ts
@@ -715,7 +715,7 @@ export interface ChatOpenAIFields
  * const Joke = z.object({
  *   setup: z.string().describe("The setup of the joke"),
  *   punchline: z.string().describe("The punchline to the joke"),
- *   rating: z.number().optional().describe("How funny the joke is, from 1 to 10")
+ *   rating: z.number().nullable().describe("How funny the joke is, from 1 to 10")
  * }).describe('Joke to tell user.');
  *
  * const structuredLlm = llm.withStructuredOutput(Joke, {