diff --git a/README.md b/README.md
index 856f3e171..3ebda69ca 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The full API of this library can be found in [api.md file](https://github.com/op
 import OpenAI from 'openai';
 
 const openai = new OpenAI({
-  apiKey: 'my api key', // defaults to process.env["OPENAI_API_KEY"]
+  apiKey: 'My API Key', // defaults to process.env["OPENAI_API_KEY"]
 });
 
 async function main() {
@@ -73,7 +73,7 @@ This library includes TypeScript definitions for all request params and response
 import OpenAI from 'openai';
 
 const openai = new OpenAI({
-  apiKey: 'my api key', // defaults to process.env["OPENAI_API_KEY"]
+  apiKey: 'My API Key', // defaults to process.env["OPENAI_API_KEY"]
 });
 
 async function main() {
diff --git a/src/index.ts b/src/index.ts
index 05f41b882..4c6d0ba7a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,10 +9,15 @@ import * as API from 'openai/resources/index';
 
 export interface ClientOptions {
   /**
-   * Defaults to process.env["OPENAI_API_KEY"].
+   * Defaults to process.env['OPENAI_API_KEY'].
    */
   apiKey?: string;
 
+  /**
+   * Defaults to process.env['OPENAI_ORG_ID'].
+   */
+  organization?: string | null;
+
   /**
    * Override the default base URL for the API, e.g., "https://api.example.com/v2/"
    */
@@ -72,21 +77,20 @@ export interface ClientOptions {
    * Only set this option to `true` if you understand the risks and have appropriate mitigations in place.
    */
   dangerouslyAllowBrowser?: boolean;
-
-  organization?: string | null;
 }
 
 /** API Client for interfacing with the OpenAI API. */
 export class OpenAI extends Core.APIClient {
   apiKey: string;
-  organization?: string | null;
+  organization: string | null;
 
   private _options: ClientOptions;
 
   /**
    * API Client for interfacing with the OpenAI API.
    *
-   * @param {string} [opts.apiKey=process.env['OPENAI_API_KEY']] - The API Key to send to the API.
+   * @param {string} [opts.apiKey==process.env['OPENAI_API_KEY'] ?? undefined]
+   * @param {string | null} [opts.organization==process.env['OPENAI_ORG_ID'] ?? null]
    * @param {string} [opts.baseURL] - Override the default base URL for the API.
    * @param {number} [opts.timeout=10 minutes] - The maximum amount of time (in milliseconds) the client will wait for a response before timing out.
    * @param {number} [opts.httpAgent] - An HTTP agent used to manage HTTP(s) connections.
@@ -95,7 +99,6 @@ export class OpenAI extends Core.APIClient {
    * @param {Core.Headers} opts.defaultHeaders - Default headers to include with every request to the API.
    * @param {Core.DefaultQuery} opts.defaultQuery - Default query parameters to include with every request to the API.
    * @param {boolean} [opts.dangerouslyAllowBrowser=false] - By default, client-side use of this library is not allowed, as it risks exposing your secret API credentials to attackers.
-   * @param {string | null} [opts.organization]
    */
   constructor({
     apiKey = Core.readEnv('OPENAI_API_KEY'),
@@ -104,7 +107,7 @@ export class OpenAI extends Core.APIClient {
   }: ClientOptions = {}) {
     if (apiKey === undefined) {
       throw new Errors.OpenAIError(
-        "The OPENAI_API_KEY environment variable is missing or empty; either provide it, or instantiate the OpenAI client with an apiKey option, like new OpenAI({ apiKey: 'my apiKey' }).",
+        "The OPENAI_API_KEY environment variable is missing or empty; either provide it, or instantiate the OpenAI client with an apiKey option, like new OpenAI({ apiKey: 'My API Key' }).",
       );
     }
 
diff --git a/tests/api-resources/audio/transcriptions.test.ts b/tests/api-resources/audio/transcriptions.test.ts
index ce0f5e389..cc23c130f 100644
--- a/tests/api-resources/audio/transcriptions.test.ts
+++ b/tests/api-resources/audio/transcriptions.test.ts
@@ -4,7 +4,7 @@ import OpenAI, { toFile } from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/audio/translations.test.ts b/tests/api-resources/audio/translations.test.ts
index 903c18909..723625f6e 100644
--- a/tests/api-resources/audio/translations.test.ts
+++ b/tests/api-resources/audio/translations.test.ts
@@ -4,7 +4,7 @@ import OpenAI, { toFile } from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/chat/completions.test.ts b/tests/api-resources/chat/completions.test.ts
index 0725211a8..4a5616cae 100644
--- a/tests/api-resources/chat/completions.test.ts
+++ b/tests/api-resources/chat/completions.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/completions.test.ts b/tests/api-resources/completions.test.ts
index c4d09793d..b3f083727 100644
--- a/tests/api-resources/completions.test.ts
+++ b/tests/api-resources/completions.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/edits.test.ts b/tests/api-resources/edits.test.ts
index 8acf37951..add95f051 100644
--- a/tests/api-resources/edits.test.ts
+++ b/tests/api-resources/edits.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/embeddings.test.ts b/tests/api-resources/embeddings.test.ts
index 23a33b30c..1e2af9297 100644
--- a/tests/api-resources/embeddings.test.ts
+++ b/tests/api-resources/embeddings.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/files.test.ts b/tests/api-resources/files.test.ts
index daa70c2ae..dc8a6da00 100644
--- a/tests/api-resources/files.test.ts
+++ b/tests/api-resources/files.test.ts
@@ -4,7 +4,7 @@ import OpenAI, { toFile } from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/fine-tunes.test.ts b/tests/api-resources/fine-tunes.test.ts
index 1221b6bc6..c82898ff2 100644
--- a/tests/api-resources/fine-tunes.test.ts
+++ b/tests/api-resources/fine-tunes.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/fine-tuning/jobs.test.ts b/tests/api-resources/fine-tuning/jobs.test.ts
index 6222a6a3e..9bcb4b085 100644
--- a/tests/api-resources/fine-tuning/jobs.test.ts
+++ b/tests/api-resources/fine-tuning/jobs.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/images.test.ts b/tests/api-resources/images.test.ts
index 55a5c22cd..c9291b258 100644
--- a/tests/api-resources/images.test.ts
+++ b/tests/api-resources/images.test.ts
@@ -4,7 +4,7 @@ import OpenAI, { toFile } from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/models.test.ts b/tests/api-resources/models.test.ts
index d3c06b8a7..91eb0d055 100644
--- a/tests/api-resources/models.test.ts
+++ b/tests/api-resources/models.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/api-resources/moderations.test.ts b/tests/api-resources/moderations.test.ts
index 798710ce7..ad315df5d 100644
--- a/tests/api-resources/moderations.test.ts
+++ b/tests/api-resources/moderations.test.ts
@@ -4,7 +4,7 @@ import OpenAI from 'openai';
 import { Response } from 'node-fetch';
 
 const openai = new OpenAI({
-  apiKey: 'something1234',
+  apiKey: 'My API Key',
   baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
 });
 
diff --git a/tests/index.test.ts b/tests/index.test.ts
index bbb4b2135..192d26c6c 100644
--- a/tests/index.test.ts
+++ b/tests/index.test.ts
@@ -23,7 +23,7 @@ describe('instantiate client', () => {
     const client = new OpenAI({
       baseURL: 'http://localhost:5000/',
       defaultHeaders: { 'X-My-Default-Header': '2' },
-      apiKey: 'my api key',
+      apiKey: 'My API Key',
     });
 
     test('they are used in the request', () => {
@@ -55,7 +55,7 @@ describe('instantiate client', () => {
       const client = new OpenAI({
         baseURL: 'http://localhost:5000/',
         defaultQuery: { apiVersion: 'foo' },
-        apiKey: 'my api key',
+        apiKey: 'My API Key',
       });
       expect(client.buildURL('/foo', null)).toEqual('http://localhost:5000/foo?apiVersion=foo');
     });
@@ -64,7 +64,7 @@ describe('instantiate client', () => {
       const client = new OpenAI({
         baseURL: 'http://localhost:5000/',
         defaultQuery: { apiVersion: 'foo', hello: 'world' },
-        apiKey: 'my api key',
+        apiKey: 'My API Key',
       });
       expect(client.buildURL('/foo', null)).toEqual('http://localhost:5000/foo?apiVersion=foo&hello=world');
     });
@@ -73,7 +73,7 @@ describe('instantiate client', () => {
       const client = new OpenAI({
         baseURL: 'http://localhost:5000/',
         defaultQuery: { hello: 'world' },
-        apiKey: 'my api key',
+        apiKey: 'My API Key',
       });
       expect(client.buildURL('/foo', { hello: undefined })).toEqual('http://localhost:5000/foo');
     });
@@ -82,7 +82,7 @@ describe('instantiate client', () => {
   test('custom fetch', async () => {
     const client = new OpenAI({
       baseURL: 'http://localhost:5000/',
-      apiKey: 'my api key',
+      apiKey: 'My API Key',
       fetch: (url) => {
         return Promise.resolve(
           new Response(JSON.stringify({ url, custom: true }), {
@@ -99,7 +99,7 @@ describe('instantiate client', () => {
   test('custom signal', async () => {
     const client = new OpenAI({
       baseURL: process.env['TEST_API_BASE_URL'] ?? 'http://127.0.0.1:4010',
-      apiKey: 'my api key',
+      apiKey: 'My API Key',
       fetch: (...args) => {
         return new Promise((resolve, reject) =>
           setTimeout(
@@ -124,57 +124,42 @@ describe('instantiate client', () => {
 
   describe('baseUrl', () => {
     test('trailing slash', () => {
-      const client = new OpenAI({ baseURL: 'http://localhost:5000/custom/path/', apiKey: 'my api key' });
+      const client = new OpenAI({ baseURL: 'http://localhost:5000/custom/path/', apiKey: 'My API Key' });
       expect(client.buildURL('/foo', null)).toEqual('http://localhost:5000/custom/path/foo');
     });
 
     test('no trailing slash', () => {
-      const client = new OpenAI({ baseURL: 'http://localhost:5000/custom/path', apiKey: 'my api key' });
+      const client = new OpenAI({ baseURL: 'http://localhost:5000/custom/path', apiKey: 'My API Key' });
       expect(client.buildURL('/foo', null)).toEqual('http://localhost:5000/custom/path/foo');
     });
   });
 
   test('maxRetries option is correctly set', () => {
-    const client = new OpenAI({ maxRetries: 1, apiKey: 'my api key' });
+    const client = new OpenAI({ maxRetries: 1, apiKey: 'My API Key' });
     expect(client.maxRetries).toEqual(1);
 
     // default
-    const client2 = new OpenAI({ apiKey: 'my api key' });
+    const client2 = new OpenAI({ apiKey: 'My API Key' });
     expect(client2.maxRetries).toEqual(2);
   });
 
-  test('with minimal arguments', () => {
-    // set API Key via env var
-    process.env['OPENAI_API_KEY'] = 'env var api key';
+  test('with environment variable arguments', () => {
+    // set options via env var
+    process.env['OPENAI_API_KEY'] = 'My API Key';
     const client = new OpenAI();
-    expect(client.apiKey).toBe('env var api key');
+    expect(client.apiKey).toBe('My API Key');
   });
 
-  test('with apiKey argument', () => {
-    process.env['OPENAI_API_KEY'] = 'env var api key';
-
-    const client = new OpenAI({ apiKey: 'another api key' });
-    expect(client.apiKey).toBe('another api key');
-  });
-
-  test('with options argument', () => {
-    process.env['OPENAI_API_KEY'] = 'env var api key';
-
-    // apiKey
-    const client = new OpenAI({ apiKey: 'my api key' });
-    expect(client.apiKey).toBe('my api key');
-  });
-
-  test('with disabled authentication', () => {
-    // fails if no API Key provided
-    expect(() => {
-      new OpenAI();
-    }).toThrow();
+  test('with overriden environment variable arguments', () => {
+    // set options via env var
+    process.env['OPENAI_API_KEY'] = 'another My API Key';
+    const client = new OpenAI({ apiKey: 'My API Key' });
+    expect(client.apiKey).toBe('My API Key');
   });
 });
 
 describe('request building', () => {
-  const client = new OpenAI({ apiKey: 'my api key' });
+  const client = new OpenAI({ apiKey: 'My API Key' });
 
   describe('Content-Length', () => {
     test('handles multi-byte characters', () => {
@@ -200,7 +185,7 @@ describe('retries', () => {
       return new Response(JSON.stringify({ a: 1 }), { headers: { 'Content-Type': 'application/json' } });
     };
 
-    const client = new OpenAI({ apiKey: 'my api key', timeout: 2000, fetch: testFetch });
+    const client = new OpenAI({ apiKey: 'My API Key', timeout: 2000, fetch: testFetch });
 
     expect(await client.request({ path: '/foo', method: 'get' })).toEqual({ a: 1 });
     expect(count).toEqual(2);