diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0110fb10b41d..e109603ddedfa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [Unreleased]
 
+### Added
+
+- Adds a `gitlens.experimental.OpenAIModel` setting to specify the OpenAI model to use to generate commit messages when using the `GitLens: Generate Commit Message` command — closes [#]() thanks to [PR #]() by sadasant ([@sadasant](https://github.com/sadasant))
+
 ## [13.5.0] - 2023-04-07
 
 ### Added
diff --git a/package.json b/package.json
index b0861275afa82..a09311d37d0e9 100644
--- a/package.json
+++ b/package.json
@@ -3684,6 +3684,13 @@
 						"scope": "window",
 						"order": 55
 					},
+					"gitlens.experimental.OpenAIModel": {
+						"type": "string",
+						"default": "gpt-3.5-turbo",
+						"markdownDescription": "Specifies the OpenAI model to use to generate commit messages when using the `GitLens: Generate Commit Message` command",
+						"scope": "window",
+						"order": 56
+					},
 					"gitlens.advanced.externalDiffTool": {
 						"type": [
 							"string",
diff --git a/src/ai/aiProviderService.ts b/src/ai/aiProviderService.ts
index 78da6b384c2df..0fffd0a2dd7c3 100644
--- a/src/ai/aiProviderService.ts
+++ b/src/ai/aiProviderService.ts
@@ -8,6 +8,7 @@ import { uncommittedStaged } from '../git/models/constants';
 import type { GitRevisionReference } from '../git/models/reference';
 import type { Repository } from '../git/models/repository';
 import { isRepository } from '../git/models/repository';
+import { configuration } from '../system/configuration';
 import type { Storage } from '../system/storage';
 import { OpenAIProvider } from './openaiProvider';
 
@@ -23,7 +24,8 @@ export class AIProviderService implements Disposable {
 	private _provider: AIProvider;
 
 	constructor(private readonly container: Container) {
-		this._provider = new OpenAIProvider(container);
+		const model = configuration.get('experimental.OpenAIModel');
+		this._provider = new OpenAIProvider(container, model);
 	}
 
 	dispose() {
diff --git a/src/ai/openaiProvider.ts b/src/ai/openaiProvider.ts
index 92c382994f6a7..a9e91e8465086 100644
--- a/src/ai/openaiProvider.ts
+++ b/src/ai/openaiProvider.ts
@@ -13,10 +13,14 @@ export class OpenAIProvider implements AIProvider {
 	readonly id = 'openai';
 	readonly name = 'OpenAI';
 
-	constructor(private readonly container: Container) {}
+	constructor(private readonly container: Container, private model: OpenAIChatCompletionModels = 'gpt-3.5-turbo') {}
 
 	dispose() {}
 
+	public setModel(model: OpenAIChatCompletionModels) {
+		this.model = model;
+	}
+
 	async generateCommitMessage(diff: string, options?: { context?: string }): Promise<string | undefined> {
 		const openaiApiKey = await getApiKey(this.container.storage);
 		if (openaiApiKey == null) return undefined;
@@ -34,7 +38,7 @@ export class OpenAIProvider implements AIProvider {
 		}
 
 		const data: OpenAIChatCompletionRequest = {
-			model: 'gpt-3.5-turbo',
+			model: this.model,
 			messages: [
 				{
 					role: 'system',
@@ -90,7 +94,7 @@ export class OpenAIProvider implements AIProvider {
 		}
 
 		const data: OpenAIChatCompletionRequest = {
-			model: 'gpt-3.5-turbo',
+			model: this.model,
 			messages: [
 				{
 					role: 'system',
@@ -195,8 +199,10 @@ async function getApiKey(storage: Storage): Promise<string | undefined> {
 	return openaiApiKey;
 }
 
+export type OpenAIChatCompletionModels = 'gpt-3.5-turbo' | 'gpt-3.5-turbo-0301' | 'gpt-4' | 'gpt-4-0314' | 'gpt-4-32k' | 'gpt-4-32k-0314';
+
 interface OpenAIChatCompletionRequest {
-	model: 'gpt-3.5-turbo' | 'gpt-3.5-turbo-0301';
+	model: OpenAIChatCompletionModels;
 	messages: { role: 'system' | 'user' | 'assistant'; content: string }[];
 	temperature?: number;
 	top_p?: number;
diff --git a/src/config.ts b/src/config.ts
index 5c050037d9cd5..aed21cd5abbe0 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -49,6 +49,7 @@ export interface Config {
 	detectNestedRepositories: boolean;
 	experimental: {
 		generateCommitMessagePrompt: string;
+		OpenAIModel: 'gpt-3.5-turbo' | 'gpt-3.5-turbo-0301' | 'gpt-4' | 'gpt-4-0314' | 'gpt-4-32k' | 'gpt-4-32k-0314';
 	};
 	fileAnnotations: {
 		command: string | null;