diff --git a/multiapi-engine/pom.xml b/multiapi-engine/pom.xml
index 6c668e8a..86cffc01 100644
--- a/multiapi-engine/pom.xml
+++ b/multiapi-engine/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.sngular</groupId>
   <artifactId>multiapi-engine</artifactId>
-  <version>6.5.0</version>
+  <version>6.5.1</version>
   <packaging>jar</packaging>
 
   <properties>
diff --git a/multiapi-engine/src/main/java/com/sngular/api/generator/plugin/common/tools/ModelBuilder.java b/multiapi-engine/src/main/java/com/sngular/api/generator/plugin/common/tools/ModelBuilder.java
index 736f476e..5172950e 100644
--- a/multiapi-engine/src/main/java/com/sngular/api/generator/plugin/common/tools/ModelBuilder.java
+++ b/multiapi-engine/src/main/java/com/sngular/api/generator/plugin/common/tools/ModelBuilder.java
@@ -448,15 +448,15 @@ private static List<SchemaFieldObject> processArray(
     final List<SchemaFieldObject> fieldObjectArrayList = new LinkedList<>();
 
     if (!ApiTool.hasItems(schema) || ApiTool.getItems(schema).isBoolean()) {
-      // No `items` schema, or `items: false` (JSON Schema 2020-12). If the array
-      // declares positional `prefixItems` (tuple), or nothing typable at all, the
-      // element type degrades to Object -> List<Object>.
+      // No `items` schema, or `items: false` (JSON Schema 2020-12). A `prefixItems`
+      // tuple becomes a List of its common element type when every position shares one
+      // type, otherwise (mixed types, or nothing typable) the element type is Object.
       final boolean isTuple = ApiTool.hasPrefixItems(schema);
       fieldObjectArrayList.add(SchemaFieldObject
                                    .builder()
                                    .baseName(fieldName)
                                    .dataType(isTuple
-                                                 ? SchemaFieldObjectType.fromTypeList(TypeConstants.ARRAY, TypeConstants.OBJECT)
+                                                 ? SchemaFieldObjectType.fromTypeList(TypeConstants.ARRAY, uniformPrefixItemType(schema, specFile))
                                                  : new SchemaFieldObjectType(TypeConstants.OBJECT))
                                    .build());
     } else {
@@ -922,8 +922,35 @@ private static String resolveArrayItemType(final JsonNode schema, final CommonSp
     if (Objects.nonNull(items) && !items.isBoolean()) {
       return ApiTool.hasRef(items) ? MapperUtil.getPojoNameFromRef(items, specFile, null) : ApiTool.getType(items);
     }
-    // `prefixItems` (tuple) or `items: false` -> degrade the element type to Object.
-    return TypeConstants.OBJECT;
+    // `prefixItems` (tuple): common element type if uniform, else Object. `items: false` -> Object.
+    return uniformPrefixItemType(schema, specFile);
+  }
+
+  private static String uniformPrefixItemType(final JsonNode schema, final CommonSpecFile specFile) {
+    if (!ApiTool.hasPrefixItems(schema)) {
+      return TypeConstants.OBJECT;
+    }
+    final JsonNode prefixItems = ApiTool.getPrefixItems(schema);
+    if (Objects.isNull(prefixItems) || !prefixItems.isArray() || !prefixItems.elements().hasNext()) {
+      return TypeConstants.OBJECT;
+    }
+    String common = null;
+    for (final JsonNode item : prefixItems) {
+      final String type;
+      if (ApiTool.hasRef(item)) {
+        type = MapperUtil.getPojoNameFromRef(item, specFile, null);
+      } else if (ApiTool.hasType(item)) {
+        type = MapperUtil.getSimpleType(item, specFile);
+      } else {
+        return TypeConstants.OBJECT;
+      }
+      if (Objects.isNull(common)) {
+        common = type;
+      } else if (!common.equals(type)) {
+        return TypeConstants.OBJECT;
+      }
+    }
+    return Objects.isNull(common) ? TypeConstants.OBJECT : common;
   }
 
   private static SchemaFieldObject buildPatternPropertiesField(
diff --git a/multiapi-engine/src/test/resources/openapigenerator/testOpenApi31Completeness/assets/GadgetDTO.java b/multiapi-engine/src/test/resources/openapigenerator/testOpenApi31Completeness/assets/GadgetDTO.java
index 414b1cfc..2356a400 100644
--- a/multiapi-engine/src/test/resources/openapigenerator/testOpenApi31Completeness/assets/GadgetDTO.java
+++ b/multiapi-engine/src/test/resources/openapigenerator/testOpenApi31Completeness/assets/GadgetDTO.java
@@ -9,6 +9,7 @@
 import org.springframework.web.multipart.MultipartFile;
 import java.util.List;
 import java.util.ArrayList;
+import java.math.BigDecimal;
 import java.util.Map;
 import java.util.HashMap;
 
@@ -24,7 +25,7 @@ public class GadgetDTO {
   @JsonProperty(value ="metadata")
   private Map<String, String> metadata;
   @JsonProperty(value ="coords")
-  private List<Object> coords;
+  private List<BigDecimal> coords;
   @JsonProperty(value ="owner")
   private PersonDTO owner;
   @JsonProperty(value ="serial")
@@ -52,7 +53,7 @@ public static class GadgetDTOBuilder {
     private Object nothing;
     private String id;
     private Map<String, String> metadata = new HashMap<String, String>();
-    private List<Object> coords = new ArrayList<Object>();
+    private List<BigDecimal> coords = new ArrayList<BigDecimal>();
     private PersonDTO owner;
     private String serial;
 
@@ -81,14 +82,14 @@ public GadgetDTO.GadgetDTOBuilder metadataValue(String key, String value) {
       return this;
     }
 
-    public GadgetDTO.GadgetDTOBuilder coords(List<Object> coords) {
+    public GadgetDTO.GadgetDTOBuilder coords(List<BigDecimal> coords) {
       if (!coords.isEmpty()) {
         this.coords.addAll(coords);
       }
       return this;
     }
 
-    public GadgetDTO.GadgetDTOBuilder coord(Object coord) {
+    public GadgetDTO.GadgetDTOBuilder coord(BigDecimal coord) {
       if (Objects.nonNull(coord)) {
         this.coords.add(coord);
       }
@@ -144,10 +145,10 @@ public void setMetadata(Map<String, String> metadata) {
   }
 
   @Schema(name = "coords", required = false)
-  public List<Object> getCoords() {
+  public List<BigDecimal> getCoords() {
     return coords;
   }
-  public void setCoords(List<Object> coords) {
+  public void setCoords(List<BigDecimal> coords) {
     this.coords = coords;
   }
 
diff --git a/scs-multiapi-gradle-plugin/build.gradle b/scs-multiapi-gradle-plugin/build.gradle
index bc031991..d750506a 100644
--- a/scs-multiapi-gradle-plugin/build.gradle
+++ b/scs-multiapi-gradle-plugin/build.gradle
@@ -21,7 +21,7 @@ repositories {
 }
 
 group = 'com.sngular'
-version = '6.5.0'
+version = '6.5.1'
 
 def SCSMultiApiPluginGroupId = group
 def SCSMultiApiPluginVersion = version
@@ -31,7 +31,7 @@ dependencies {
   shadow localGroovy()
   shadow gradleApi()
 
-  implementation 'com.sngular:multiapi-engine:6.5.0'
+  implementation 'com.sngular:multiapi-engine:6.5.1'
   testImplementation 'org.assertj:assertj-core:3.24.2'
   testImplementation 'com.puppycrawl.tools:checkstyle:10.12.3'
   testImplementation 'org.junit.platform:junit-platform-launcher:1.9.2'
@@ -100,7 +100,7 @@ testing {
 
     integrationTest(JvmTestSuite) {
       dependencies {
-        implementation 'com.sngular:scs-multiapi-gradle-plugin:6.5.0'
+        implementation 'com.sngular:scs-multiapi-gradle-plugin:6.5.1'
         implementation 'org.assertj:assertj-core:3.24.2'
       }
 
diff --git a/scs-multiapi-maven-plugin/pom.xml b/scs-multiapi-maven-plugin/pom.xml
index d70d56f0..eaa78b50 100644
--- a/scs-multiapi-maven-plugin/pom.xml
+++ b/scs-multiapi-maven-plugin/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.sngular</groupId>
   <artifactId>scs-multiapi-maven-plugin</artifactId>
-    <version>6.5.0</version>
+    <version>6.5.1</version>
   <packaging>maven-plugin</packaging>
 
   <name>AsyncApi - OpenApi Code Generator Maven Plugin</name>
@@ -271,7 +271,7 @@
     <dependency>
       <groupId>com.sngular</groupId>
       <artifactId>multiapi-engine</artifactId>
-      <version>6.5.0</version>
+      <version>6.5.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
@@ -560,7 +560,7 @@
           <plugin>
             <groupId>org.sonatype.central</groupId>
             <artifactId>central-publishing-maven-plugin</artifactId>
-            <version>0.6.0</version>
+            <version>0.11.0</version>
             <extensions>true</extensions>
             <configuration>
               <autoPublish>true</autoPublish>