diff --git a/sdk/openai/openai/assets.json b/sdk/openai/openai/assets.json
index 53d7b0049f59..0fba4f5078f9 100644
--- a/sdk/openai/openai/assets.json
+++ b/sdk/openai/openai/assets.json
@@ -2,5 +2,5 @@
   "AssetsRepo": "Azure/azure-sdk-assets",
   "AssetsRepoPrefixPath": "js",
   "TagPrefix": "js/openai/openai",
-  "Tag": "js/openai/openai_6b73e03317"
+  "Tag": "js/openai/openai_3df73efcf2"
 }
diff --git a/sdk/openai/openai/review/openai.api.md b/sdk/openai/openai/review/openai.api.md
index e6c1dcce4230..47152130509c 100644
--- a/sdk/openai/openai/review/openai.api.md
+++ b/sdk/openai/openai/review/openai.api.md
@@ -219,6 +219,7 @@ export interface ChatCompletions {
 export interface ChatCompletionsFunctionToolCall {
     function: FunctionCall;
     id: string;
+    index?: number;
     type: "function";
 }
 
diff --git a/sdk/openai/openai/sources/customizations/models/models.ts b/sdk/openai/openai/sources/customizations/models/models.ts
index 40539b195492..4381b9a33d23 100644
--- a/sdk/openai/openai/sources/customizations/models/models.ts
+++ b/sdk/openai/openai/sources/customizations/models/models.ts
@@ -287,6 +287,8 @@ export interface ChatCompletionsFunctionToolCall {
   function: FunctionCall;
   /** The ID of the tool call. */
   id: string;
+  /** The index of the tool call. */
+  index?: number;
 }
 
 /**
diff --git a/sdk/openai/openai/src/models/models.ts b/sdk/openai/openai/src/models/models.ts
index adcbd83dcfbb..647feb0ec7f7 100644
--- a/sdk/openai/openai/src/models/models.ts
+++ b/sdk/openai/openai/src/models/models.ts
@@ -490,6 +490,8 @@ export interface ChatCompletionsFunctionToolCall {
   function: FunctionCall;
   /** The ID of the tool call. */
   id: string;
+  /** The index of the tool call. */
+  index?: number;
 }
 
 /**
diff --git a/sdk/openai/openai/test/public/completions.spec.ts b/sdk/openai/openai/test/public/completions.spec.ts
index cbef93243cf7..963af5a7d3e7 100644
--- a/sdk/openai/openai/test/public/completions.spec.ts
+++ b/sdk/openai/openai/test/public/completions.spec.ts
@@ -514,6 +514,40 @@ describe("OpenAI", function () {
             );
           });
 
+          it("calls toolCalls", async function () {
+            updateWithSucceeded(
+              await withDeployments(
+                getSucceeded(
+                  authMethod,
+                  deployments,
+                  models,
+                  chatCompletionDeployments,
+                  chatCompletionModels,
+                ),
+                async (deploymentName) =>
+                  bufferAsyncIterable(
+                    await client.streamChatCompletions(
+                      deploymentName,
+                      [{ role: "user", content: "What's the weather like in Boston?" }],
+                      {
+                        tools: [{ type: "function", function: getCurrentWeather }],
+                      },
+                    ),
+                  ),
+                (res) =>
+                  assertChatCompletionsList(res, {
+                    functions: true,
+                    // The API returns an empty choice in the first event for some
+                    // reason. This should be fixed in the API.
+                    allowEmptyChoices: true,
+                  }),
+              ),
+              chatCompletionDeployments,
+              chatCompletionModels,
+              authMethod,
+            );
+          });
+
           it("bring your own data", async function () {
             if (authMethod === "OpenAIKey") {
               this.skip();
diff --git a/sdk/openai/openai/test/public/utils/asserts.ts b/sdk/openai/openai/test/public/utils/asserts.ts
index fe242cfd8bc0..4820838c2c18 100644
--- a/sdk/openai/openai/test/public/utils/asserts.ts
+++ b/sdk/openai/openai/test/public/utils/asserts.ts
@@ -180,6 +180,7 @@ function assertToolCall(
 ): void {
   assertIf(!stream, functionCall.type, assert.isString);
   assertIf(!stream, functionCall.id, assert.isString);
+  assertIf(Boolean(stream), functionCall.index, assert.isNumber);
   switch (functionCall.type) {
     case "function":
       assertFunctionCall(functionCall.function, { stream });