Replace OpenAI's o1-preview with o3

Since `o1` models are deprecated, and the Responses API no longer
supports `o1`.

See: https://platform.openai.com/docs/deprecations#2025-04-28-o1-preview-and-o1-mini

Author: paulinevos

examples/openai/chat-o1.php renamed to examples/openai/chat-o3.php

@@ -32,7 +32,7 @@
     at the beginning and end, not throughout the code.
     PROMPT;
 
-$agent = new Agent($platform, 'o1-preview');
+$agent = new Agent($platform, 'o3');
 $result = $agent->call(new MessageBag(Message::ofUser($prompt)));
 
 echo $result->getContent().\PHP_EOL;

src/platform/src/Bridge/OpenAi/ModelCatalog.php

@@ -91,32 +91,23 @@ public function __construct(array $additionalModels = [])
                     Capability::OUTPUT_TEXT,
                     Capability::OUTPUT_STREAMING,
                     Capability::TOOL_CALLING,
+                    // Audio is unsupported temporarily due to migration to Responses API;
+                    // Capability will be reintroduced when Responses API supports audio ("coming soon")
+                    // See: https://platform.openai.com/docs/guides/migrate-to-responses#responses-benefits
+                    // Capability::INPUT_AUDIO,
                     Capability::INPUT_IMAGE,
                     Capability::OUTPUT_STRUCTURED,
                 ],
             ],
-            'o1-mini' => [
-                'class' => Gpt::class,
-                'capabilities' => [
-                    Capability::INPUT_MESSAGES,
-                    Capability::OUTPUT_TEXT,
-                    Capability::OUTPUT_STREAMING,
-                    Capability::TOOL_CALLING,
-                    Capability::INPUT_IMAGE,
-                ],
-            ],
-            'o1-preview' => [
+            'o3' => [
                 'class' => Gpt::class,
                 'capabilities' => [
                     Capability::INPUT_MESSAGES,
                     Capability::OUTPUT_TEXT,
                     Capability::OUTPUT_STREAMING,
                     Capability::TOOL_CALLING,
                     Capability::INPUT_IMAGE,
-                    // Audio is unsupported temporarily due to migration to Responses API;
-                    // Capability will be reintroduced when Responses API supports audio ("coming soon")
-                    // See: https://platform.openai.com/docs/guides/migrate-to-responses#responses-benefits
-                    // Capability::INPUT_AUDIO,
+                    Capability::OUTPUT_STRUCTURED,
                 ],
             ],
             'o3-mini' => [