diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 74af4d46e..e99be4da9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.49.1"
+  ".": "4.50.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0f49f420..47cafc9b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 4.50.0 (2024-06-10)
+
+Full Changelog: [v4.49.1...v4.50.0](https://github.com/openai/openai-node/compare/v4.49.1...v4.50.0)
+
+### Features
+
+* support `application/octet-stream` request bodies ([#892](https://github.com/openai/openai-node/issues/892)) ([51661c8](https://github.com/openai/openai-node/commit/51661c8068d4990df6916becb6bb85353b54ef4d))
+
 ## 4.49.1 (2024-06-07)
 
 Full Changelog: [v4.49.0...v4.49.1](https://github.com/openai/openai-node/compare/v4.49.0...v4.49.1)
diff --git a/README.md b/README.md
index 61c0b2697..c1c910645 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ You can import in Deno via:
 <!-- x-release-please-start-version -->
 
 ```ts
-import OpenAI from 'https://deno.land/x/openai@v4.49.1/mod.ts';
+import OpenAI from 'https://deno.land/x/openai@v4.50.0/mod.ts';
 ```
 
 <!-- x-release-please-end -->
diff --git a/package.json b/package.json
index f75c903c4..0cc852583 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openai",
-  "version": "4.49.1",
+  "version": "4.50.0",
   "description": "The official TypeScript library for the OpenAI API",
   "author": "OpenAI <support@openai.com>",
   "types": "dist/index.d.ts",
diff --git a/scripts/build-deno b/scripts/build-deno
index 73f54338d..6d6109f7b 100755
--- a/scripts/build-deno
+++ b/scripts/build-deno
@@ -16,7 +16,7 @@ This is a build produced from https://github.com/openai/openai-node – please g
 Usage:
 
 \`\`\`ts
-import OpenAI from "https://deno.land/x/openai@v4.49.1/mod.ts";
+import OpenAI from "https://deno.land/x/openai@v4.50.0/mod.ts";
 
 const client = new OpenAI();
 \`\`\`
diff --git a/src/core.ts b/src/core.ts
index 39fe0f97f..2d91751d7 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -19,7 +19,7 @@ import {
   type HeadersInit,
 } from './_shims/index';
 export { type Response };
-import { isMultipartBody } from './uploads';
+import { BlobLike, isBlobLike, isMultipartBody } from './uploads';
 export {
   maybeMultipartFormRequestOptions,
   multipartFormRequestOptions,
@@ -249,7 +249,17 @@ export abstract class APIClient {
     path: string,
     opts?: PromiseOrValue<RequestOptions<Req>>,
   ): APIPromise<Rsp> {
-    return this.request(Promise.resolve(opts).then((opts) => ({ method, path, ...opts })));
+    return this.request(
+      Promise.resolve(opts).then(async (opts) => {
+        const body =
+          opts && isBlobLike(opts?.body) ? new DataView(await opts.body.arrayBuffer())
+          : opts?.body instanceof DataView ? opts.body
+          : opts?.body instanceof ArrayBuffer ? new DataView(opts.body)
+          : opts && ArrayBuffer.isView(opts?.body) ? new DataView(opts.body.buffer)
+          : opts?.body;
+        return { method, path, ...opts, body };
+      }),
+    );
   }
 
   getAPIList<Item, PageClass extends AbstractPage<Item> = AbstractPage<Item>>(
@@ -271,6 +281,8 @@ export abstract class APIClient {
         const encoded = encoder.encode(body);
         return encoded.length.toString();
       }
+    } else if (ArrayBuffer.isView(body)) {
+      return body.byteLength.toString();
     }
 
     return null;
@@ -280,7 +292,9 @@ export abstract class APIClient {
     const { method, path, query, headers: headers = {} } = options;
 
     const body =
-      isMultipartBody(options.body) ? options.body.body
+      ArrayBuffer.isView(options.body) || (options.__binaryRequest && typeof options.body === 'string') ?
+        options.body
+      : isMultipartBody(options.body) ? options.body.body
       : options.body ? JSON.stringify(options.body, null, 2)
       : null;
     const contentLength = this.calculateContentLength(body);
@@ -735,7 +749,9 @@ export type Headers = Record<string, string | null | undefined>;
 export type DefaultQuery = Record<string, string | undefined>;
 export type KeysEnum<T> = { [P in keyof Required<T>]: true };
 
-export type RequestOptions<Req = unknown | Record<string, unknown> | Readable> = {
+export type RequestOptions<
+  Req = unknown | Record<string, unknown> | Readable | BlobLike | ArrayBufferView | ArrayBuffer,
+> = {
   method?: HTTPMethod;
   path?: string;
   query?: Req | undefined;
@@ -749,6 +765,7 @@ export type RequestOptions<Req = unknown | Record<string, unknown> | Readable> =
   signal?: AbortSignal | undefined | null;
   idempotencyKey?: string;
 
+  __binaryRequest?: boolean | undefined;
   __binaryResponse?: boolean | undefined;
   __streamClass?: typeof Stream;
 };
@@ -770,6 +787,7 @@ const requestOptionsKeys: KeysEnum<RequestOptions> = {
   signal: true,
   idempotencyKey: true,
 
+  __binaryRequest: true,
   __binaryResponse: true,
   __streamClass: true,
 };
@@ -783,10 +801,11 @@ export const isRequestOptions = (obj: unknown): obj is RequestOptions => {
   );
 };
 
-export type FinalRequestOptions<Req = unknown | Record<string, unknown> | Readable> = RequestOptions<Req> & {
-  method: HTTPMethod;
-  path: string;
-};
+export type FinalRequestOptions<Req = unknown | Record<string, unknown> | Readable | DataView> =
+  RequestOptions<Req> & {
+    method: HTTPMethod;
+    path: string;
+  };
 
 declare const Deno: any;
 declare const EdgeRuntime: any;
diff --git a/src/version.ts b/src/version.ts
index 7df786cb2..44f8e47e3 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '4.49.1'; // x-release-please-version
+export const VERSION = '4.50.0'; // x-release-please-version