diff --git a/api.md b/api.md
index 0ea5eae95..67ff66dec 100644
--- a/api.md
+++ b/api.md
@@ -2,7 +2,7 @@
 
 Types:
 
-- <code><a href="./src/resources/shared.ts">FunctionObject</a></code>
+- <code><a href="./src/resources/shared.ts">FunctionDefinition</a></code>
 - <code><a href="./src/resources/shared.ts">FunctionParameters</a></code>
 
 # Completions
diff --git a/src/index.ts b/src/index.ts
index 152ee3b03..d91a608cb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -297,7 +297,7 @@ export namespace OpenAI {
 
   export import Beta = API.Beta;
 
-  export import FunctionObject = API.FunctionObject;
+  export import FunctionDefinition = API.FunctionDefinition;
   export import FunctionParameters = API.FunctionParameters;
 }
 
diff --git a/src/resources/beta/assistants/assistants.ts b/src/resources/beta/assistants/assistants.ts
index 949d305af..052a3d666 100644
--- a/src/resources/beta/assistants/assistants.ts
+++ b/src/resources/beta/assistants/assistants.ts
@@ -164,7 +164,7 @@ export namespace Assistant {
   }
 
   export interface Function {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
@@ -249,7 +249,7 @@ export namespace AssistantCreateParams {
   }
 
   export interface AssistantToolsFunction {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
@@ -328,7 +328,7 @@ export namespace AssistantUpdateParams {
   }
 
   export interface AssistantToolsFunction {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
diff --git a/src/resources/beta/threads/runs/runs.ts b/src/resources/beta/threads/runs/runs.ts
index 4579214a2..c2fc93a3c 100644
--- a/src/resources/beta/threads/runs/runs.ts
+++ b/src/resources/beta/threads/runs/runs.ts
@@ -325,7 +325,7 @@ export namespace Run {
   }
 
   export interface AssistantToolsFunction {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
@@ -391,7 +391,7 @@ export namespace RunCreateParams {
   }
 
   export interface AssistantToolsFunction {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
diff --git a/src/resources/beta/threads/threads.ts b/src/resources/beta/threads/threads.ts
index 0d72b2311..c147cefad 100644
--- a/src/resources/beta/threads/threads.ts
+++ b/src/resources/beta/threads/threads.ts
@@ -280,7 +280,7 @@ export namespace ThreadCreateAndRunParams {
   }
 
   export interface AssistantToolsFunction {
-    function: Shared.FunctionObject;
+    function: Shared.FunctionDefinition;
 
     /**
      * The type of tool being defined: `function`
diff --git a/src/resources/chat/completions.ts b/src/resources/chat/completions.ts
index 38a27de67..232dc9c8a 100644
--- a/src/resources/chat/completions.ts
+++ b/src/resources/chat/completions.ts
@@ -486,7 +486,7 @@ export interface ChatCompletionSystemMessageParam {
 }
 
 export interface ChatCompletionTool {
-  function: Shared.FunctionObject;
+  function: Shared.FunctionDefinition;
 
   /**
    * The type of the tool. Currently, only `function` is supported.
diff --git a/src/resources/shared.ts b/src/resources/shared.ts
index 873278df5..d8d9bd0c8 100644
--- a/src/resources/shared.ts
+++ b/src/resources/shared.ts
@@ -1,6 +1,6 @@
 // File generated from our OpenAPI spec by Stainless.
 
-export interface FunctionObject {
+export interface FunctionDefinition {
   /**
    * The name of the function to be called. Must be a-z, A-Z, 0-9, or contain
    * underscores and dashes, with a maximum length of 64.