diff --git a/README.md b/README.md
index c07a9f2e..01113cb5 100644
--- a/README.md
+++ b/README.md
@@ -197,11 +197,11 @@ aicommits config set proxy=
 
 #### model
 
-Default: `gpt-3.5-turbo`
+Default: `gpt-4o-mini`
 
 The Chat Completions (`/v1/chat/completions`) model to use. Consult the list of models available in the [OpenAI Documentation](https://platform.openai.com/docs/models/model-endpoint-compatibility).
 
-> Tip: If you have access, try upgrading to [`gpt-4`](https://platform.openai.com/docs/models/gpt-4) for next-level code analysis. It can handle double the input size, but comes at a higher cost. Check out OpenAI's website to learn more.
+> Tip: If budget allows, consider upgrading to [`gpt-4o`](https://platform.openai.com/docs/models/gpt-4o) for next-level code analysis. It offers enhanced capabilities but comes at a higher cost. Check out OpenAI's website to learn more.
 
 #### timeout
 
diff --git a/package.json b/package.json
index 4eb26f13..111e2c7d 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
 		"prepack": "pnpm build && clean-pkg-json"
 	},
 	"dependencies": {
-		"@dqbd/tiktoken": "^1.0.2"
+		"@dqbd/tiktoken": "^1.0.15"
 	},
 	"devDependencies": {
 		"@clack/prompts": "^0.7.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 4f5069d5..6aedd6d4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6,8 +6,8 @@ settings:
 
 dependencies:
   '@dqbd/tiktoken':
-    specifier: ^1.0.2
-    version: 1.0.7
+    specifier: ^1.0.15
+    version: 1.0.15
 
 devDependencies:
   '@clack/prompts':
@@ -100,8 +100,8 @@ packages:
     bundledDependencies:
       - is-unicode-supported
 
-  /@dqbd/tiktoken@1.0.7:
-    resolution: {integrity: sha512-bhR5k5W+8GLzysjk8zTMVygQZsgvf7W1F0IlL4ZQ5ugjo5rCyiwGM5d8DYriXspytfu98tv59niang3/T+FoDw==}
+  /@dqbd/tiktoken@1.0.15:
+    resolution: {integrity: sha512-a6I67K1xUkuqcuwulobIJiLikkoE7egMaviI1Jg5bxSn2V7QGqXsGE3jTKr8UIOU/o74mAAd5TkeXFNBtaKF4A==}
     dev: false
 
   /@esbuild/android-arm64@0.18.20:
diff --git a/src/utils/config.ts b/src/utils/config.ts
index 0e07a59f..fd125451 100644
--- a/src/utils/config.ts
+++ b/src/utils/config.ts
@@ -82,7 +82,7 @@ const configParsers = {
 	},
 	model(model?: string) {
 		if (!model || model.length === 0) {
-			return 'gpt-3.5-turbo';
+			return 'gpt-4o-mini';
 		}
 
 		return model as TiktokenModel;
diff --git a/tests/specs/openai/conventional-commits.ts b/tests/specs/openai/conventional-commits.ts
index 7a3e43e6..90dbba1b 100644
--- a/tests/specs/openai/conventional-commits.ts
+++ b/tests/specs/openai/conventional-commits.ts
@@ -140,7 +140,7 @@ export default testSuite(({ describe }) => {
 			} as ValidConfig;
 			const commitMessages = await generateCommitMessage(
 				OPENAI_KEY!,
-				'gpt-3.5-turbo',
+				'gpt-4o-mini',
 				config.locale,
 				gitDiff,
 				config.generate,