diff --git a/.github/workflows/generate.yml b/.github/workflows/generate.yml
index f5db9c3..359060e 100644
--- a/.github/workflows/generate.yml
+++ b/.github/workflows/generate.yml
@@ -63,6 +63,7 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.MACHINE_USER_TOKEN }}
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          OPENAI_MODEL: ${{ secrets.OPENAI_MODEL }}
         run: |
           set -ex
           
diff --git a/src/Command/GenerateCommitMessage.php b/src/Command/GenerateCommitMessage.php
index 08b30a5..09d4482 100644
--- a/src/Command/GenerateCommitMessage.php
+++ b/src/Command/GenerateCommitMessage.php
@@ -10,6 +10,8 @@
 
 class GenerateCommitMessage extends Command
 {
+    public const DefaultModel = 'gpt-oss-120b';
+
     private OpenAI\Client $client;
 
     protected function configure()
@@ -46,7 +48,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         }
 
         $result = $this->client->chat()->create([
-            'model' => getenv('OPENAI_MODEL') ?: 'gpt-4o-mini',
+            'model' => getenv('OPENAI_MODEL') ?: self::DefaultModel,
             'messages' => [
                 ['role' => 'system', 'content' => 'You will be provided a Git diff. Generate a commit message from it, following the conventional commit message format. Provide the output in plain text, without any additional formatting.'],
                 ['role' => 'user', 'content' => $diff],
diff --git a/src/Command/GenerateReleaseNotes.php b/src/Command/GenerateReleaseNotes.php
index 9eb96e4..de4955e 100644
--- a/src/Command/GenerateReleaseNotes.php
+++ b/src/Command/GenerateReleaseNotes.php
@@ -29,11 +29,13 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $diff = substr($diff, 0, 256 * 1024);
         }
 
-        $yourApiKey = getenv('OPENAI_API_KEY');
-        $client = OpenAI::client($yourApiKey);
+        $client = (new OpenAI\Factory)
+            ->withBaseUri(getenv('OPENAI_BASE_URL') ?: 'https://llm.aihosting.mittwald.de/v1')
+            ->withApiKey(getenv('OPENAI_API_KEY'))
+            ->make();
 
         $result = $client->chat()->create([
-            'model' => 'gpt-4o-mini',
+            'model' => getenv('OPENAI_MODEL') ?: GenerateCommitMessage::DefaultModel,
             'messages' => [
                 ['role' => 'system', 'content' => 'You will be provided a Git diff. Generate a Github release notes document, in markdown format. Your response should include ONLY the release notes without any additional start or end markers. Do not include a generic heading or date information; start any intermediate headings at the h2 level. When features are added, also include a high-level summary of said features.'],
                 ['role' => 'user', 'content' => $diff],