diff --git a/src/resources/beta/threads/threads.ts b/src/resources/beta/threads/threads.ts
index ccc94fb65..641f48738 100644
--- a/src/resources/beta/threads/threads.ts
+++ b/src/resources/beta/threads/threads.ts
@@ -2,6 +2,7 @@
 
 import * as Core from 'openai/core';
 import { APIResource } from 'openai/resource';
+import { isRequestOptions } from 'openai/core';
 import * as ThreadsAPI from 'openai/resources/beta/threads/threads';
 import * as MessagesAPI from 'openai/resources/beta/threads/messages/messages';
 import * as RunsAPI from 'openai/resources/beta/threads/runs/runs';
@@ -13,7 +14,15 @@ export class Threads extends APIResource {
   /**
    * Create a thread.
    */
-  create(body: ThreadCreateParams, options?: Core.RequestOptions): Core.APIPromise<Thread> {
+  create(body?: ThreadCreateParams, options?: Core.RequestOptions): Core.APIPromise<Thread>;
+  create(options?: Core.RequestOptions): Core.APIPromise<Thread>;
+  create(
+    body: ThreadCreateParams | Core.RequestOptions = {},
+    options?: Core.RequestOptions,
+  ): Core.APIPromise<Thread> {
+    if (isRequestOptions(body)) {
+      return this.create({}, body);
+    }
     return this.post('/threads', {
       body,
       ...options,
diff --git a/src/resources/chat/completions.ts b/src/resources/chat/completions.ts
index b81da9fa3..412688dfa 100644
--- a/src/resources/chat/completions.ts
+++ b/src/resources/chat/completions.ts
@@ -177,6 +177,14 @@ export interface ChatCompletionChunk {
    * The object type, which is always `chat.completion.chunk`.
    */
   object: 'chat.completion.chunk';
+
+  /**
+   * This fingerprint represents the backend configuration that the model runs with.
+   *
+   * Can be used in conjunction with the `seed` request parameter to understand when
+   * backend changes have been made that might impact determinism.
+   */
+  system_fingerprint?: string;
 }
 
 export namespace ChatCompletionChunk {
@@ -296,14 +304,14 @@ export interface ChatCompletionContentPartImage {
 export namespace ChatCompletionContentPartImage {
   export interface ImageURL {
     /**
-     * Specifies the detail level of the image.
+     * Either a URL of the image or the base64 encoded image data.
      */
-    detail?: 'auto' | 'low' | 'high';
+    url: string;
 
     /**
-     * Either a URL of the image or the base64 encoded image data.
+     * Specifies the detail level of the image.
      */
-    url?: string;
+    detail?: 'auto' | 'low' | 'high';
   }
 }
 
@@ -579,6 +587,8 @@ export interface ChatCompletionCreateParamsBase {
    */
   model:
     | (string & {})
+    | 'gpt-4-1106-preview'
+    | 'gpt-4-vision-preview'
     | 'gpt-4'
     | 'gpt-4-0314'
     | 'gpt-4-0613'
diff --git a/tests/api-resources/beta/threads/threads.test.ts b/tests/api-resources/beta/threads/threads.test.ts
index 4ca2247dd..fc9fef723 100644
--- a/tests/api-resources/beta/threads/threads.test.ts
+++ b/tests/api-resources/beta/threads/threads.test.ts
@@ -10,7 +10,7 @@ const openai = new OpenAI({
 
 describe('resource threads', () => {
   test('create', async () => {
-    const responsePromise = openai.beta.threads.create({});
+    const responsePromise = openai.beta.threads.create();
     const rawResponse = await responsePromise.asResponse();
     expect(rawResponse).toBeInstanceOf(Response);
     const response = await responsePromise;
@@ -20,6 +20,30 @@ describe('resource threads', () => {
     expect(dataAndResponse.response).toBe(rawResponse);
   });
 
+  test('create: request options instead of params are passed correctly', async () => {
+    // ensure the request options are being passed correctly by passing an invalid HTTP method in order to cause an error
+    await expect(openai.beta.threads.create({ path: '/_stainless_unknown_path' })).rejects.toThrow(
+      OpenAI.NotFoundError,
+    );
+  });
+
+  test('create: request options and params are passed correctly', async () => {
+    // ensure the request options are being passed correctly by passing an invalid HTTP method in order to cause an error
+    await expect(
+      openai.beta.threads.create(
+        {
+          messages: [
+            { role: 'user', content: 'x', file_ids: ['string'], metadata: {} },
+            { role: 'user', content: 'x', file_ids: ['string'], metadata: {} },
+            { role: 'user', content: 'x', file_ids: ['string'], metadata: {} },
+          ],
+          metadata: {},
+        },
+        { path: '/_stainless_unknown_path' },
+      ),
+    ).rejects.toThrow(OpenAI.NotFoundError);
+  });
+
   test('retrieve', async () => {
     const responsePromise = openai.beta.threads.retrieve('string');
     const rawResponse = await responsePromise.asResponse();