Add GPT-5 mini model card

Author: anastasiaberyoza

content/guides/box-ai/ai-models/index.md

@@ -77,7 +77,15 @@ Box AI is powered by the following AI models. These models are integrated with B
 				<strong style="background-color: #e1ffe7">Available</strong>
 				<strong style="background-color: #f8d59b">Premium</strong>
 			</div>
-		</Tile>   
+		</Tile>
+        <Tile type="gpt" title="openai__gpt_5_mini" href="/guides/box-ai/ai-models/openai-gpt-5-mini-model-card">
+			A model designed for well-defined tasks and precise prompts
+   		<div>
+   			<strong style="background-color: #e8e8e8">Chat</strong>
+				<strong style="background-color: #e1ffe7">Available</strong>
+				<strong style="background-color: #fdfad8">Standard</strong>
+			</div>
+		</Tile>    
 		<Tile type="gpt" title="azure__openai__gpt_4_1_mini" href="/guides/box-ai/ai-models/azure-openai-gpt-4-1-mini-model-card">
 			A multimodal model designed to handle lightweight tasks.
 			<div>