diff --git a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleImageGenerationModel.php b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleImageGenerationModel.php
index 7200fa3f..ecb2cf54 100644
--- a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleImageGenerationModel.php
+++ b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleImageGenerationModel.php
@@ -24,7 +24,11 @@
 use WordPress\AiClient\Results\Enums\FinishReasonEnum;
 
 /**
- * Base class for an image generation model for an OpenAI compatible provider.
+ * Base class for an image generation model for providers that implement OpenAI's API format.
+ *
+ * This abstract class is designed to work with any AI provider that offers an OpenAI-compatible
+ * API endpoint for image generation, including but not limited to Anthropic, Google, and other
+ * providers that have adopted OpenAI's image generation API specification as a standard interface.
  *
  * @since 0.1.0
  *
diff --git a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleModelMetadataDirectory.php b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleModelMetadataDirectory.php
index c1bda19b..475103c1 100644
--- a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleModelMetadataDirectory.php
+++ b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleModelMetadataDirectory.php
@@ -13,7 +13,11 @@
 use WordPress\AiClient\Providers\Models\DTO\ModelMetadata;
 
 /**
- * Base class for a model metadata directory for an OpenAI compatible provider.
+ * Base class for a model metadata directory for providers that implement OpenAI's API format.
+ *
+ * This abstract class is designed to work with any AI provider that offers an OpenAI-compatible
+ * models listing endpoint, including but not limited to Anthropic, Google, and other
+ * providers that have adopted OpenAI's models API specification as a standard interface.
  *
  * @since 0.1.0
  */
diff --git a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleTextGenerationModel.php b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleTextGenerationModel.php
index f48fac24..75908c69 100644
--- a/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleTextGenerationModel.php
+++ b/src/Providers/OpenAiCompatibleImplementation/AbstractOpenAiCompatibleTextGenerationModel.php
@@ -27,7 +27,11 @@
 use WordPress\AiClient\Tools\DTO\FunctionDeclaration;
 
 /**
- * Base class for a text generation model for an OpenAI compatible provider.
+ * Base class for a text generation model for providers that implement OpenAI's API format.
+ *
+ * This abstract class is designed to work with any AI provider that offers an OpenAI-compatible
+ * API endpoint, including but not limited to Anthropic, Google, and other providers
+ * that have adopted OpenAI's API specification as a standard interface.
  *
  * @since 0.1.0
  *
diff --git a/tests/unit/Providers/OpenAiCompatibleImplementation/MockOpenAiCompatibleTextGenerationModel.php b/tests/unit/Providers/OpenAiCompatibleImplementation/MockOpenAiCompatibleTextGenerationModel.php
index 0b7e8549..05d49837 100644
--- a/tests/unit/Providers/OpenAiCompatibleImplementation/MockOpenAiCompatibleTextGenerationModel.php
+++ b/tests/unit/Providers/OpenAiCompatibleImplementation/MockOpenAiCompatibleTextGenerationModel.php
@@ -113,9 +113,9 @@ public function exposePrepareGenerateTextParams(array $prompt): array
         return $this->prepareGenerateTextParams($prompt);
     }
 
-    public function exposeMergeSystemInstruction(array $prompt, string $systemInstruction): array
+    public function exposePrepareMessagesParamWithSystemInstruction(array $prompt, string $systemInstruction): array
     {
-        return $this->mergeSystemInstruction($prompt, $systemInstruction);
+        return $this->prepareMessagesParam($prompt, $systemInstruction);
     }
 
     public function exposePrepareMessagesParam(array $messages): array