diff --git a/sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OrchestrationService.java b/sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OrchestrationService.java
index 1e9e0a096..85943bcd0 100644
--- a/sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OrchestrationService.java
+++ b/sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OrchestrationService.java
@@ -465,12 +465,15 @@ public record Translation(
   @Nonnull
   public OrchestrationChatResponse responseFormatJsonSchema(
       @Nonnull final String word, @Nonnull final Class<?> targetType) {
+    // Gemini cannot be used here. This is a known issue that should be resolved with AI Core
+    // release 2510b. See https://jira.tools.sap/browse/AI-125770
+    final var configWithGpt4 = new OrchestrationModuleConfig().withLlmConfig(GPT_4O_MINI);
     val schema =
         ResponseJsonSchema.fromType(targetType)
             .withDescription("Output schema for language translation.")
             .withStrict(true);
     val configWithResponseSchema =
-        config.withTemplateConfig(TemplateConfig.create().withJsonSchemaResponse(schema));
+        configWithGpt4.withTemplateConfig(TemplateConfig.create().withJsonSchemaResponse(schema));
 
     val prompt =
         new OrchestrationPrompt(
@@ -586,8 +589,12 @@ public OrchestrationChatResponse templateFromPromptRegistryByScenario(
   @Nonnull
   public OrchestrationChatResponse localPromptTemplate(@Nonnull final String promptTemplate)
       throws IOException {
+    // Gemini cannot be used here. This is a known issue that should be resolved with AI Core
+    // release 2510b. See https://jira.tools.sap/browse/AI-125770
+    final var configWithGpt4 = new OrchestrationModuleConfig().withLlmConfig(GPT_4O_MINI);
     val template = TemplateConfig.create().fromYaml(promptTemplate);
-    val configWithTemplate = template != null ? config.withTemplateConfig(template) : config;
+    val configWithTemplate =
+        template != null ? configWithGpt4.withTemplateConfig(template) : configWithGpt4;
 
     val inputParams = Map.of("language", "German");
     val prompt = new OrchestrationPrompt(inputParams);
diff --git a/sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/ScenarioTest.java b/sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/ScenarioTest.java
index a2085e412..767c88f28 100644
--- a/sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/ScenarioTest.java
+++ b/sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/ScenarioTest.java
@@ -9,6 +9,7 @@
 import java.lang.reflect.Field;
 import java.util.HashMap;
 import java.util.Optional;
+import java.util.Set;
 import lombok.SneakyThrows;
 import org.assertj.core.api.SoftAssertions;
 import org.junit.jupiter.api.DisplayName;
@@ -70,6 +71,8 @@ void orchestrationAiModelAvailability() {
     // Gather AI Core's list of available Orchestration models
     final var aiModelList = new ScenarioController().getModels().getResources();
 
+    var internalOnlyModels = Set.of("abap-codestral");
+
     final var availableOrchestrationModels =
         aiModelList.stream()
             .filter(
@@ -77,6 +80,7 @@ void orchestrationAiModelAvailability() {
                     model.getAllowedScenarios().stream()
                         .anyMatch(scenario -> scenario.getScenarioId().equals("orchestration")))
             .filter(model -> !model.getModel().contains("embed"))
+            .filter(model -> !internalOnlyModels.contains(model.getModel()))
             .collect(
                 () -> new HashMap<String, Boolean>(),
                 (list, model) -> list.put(model.getModel(), isDeprecated(model)),