diff --git a/direct-query/src/main/java/org/opensearch/sql/directquery/transport/model/datasource/PrometheusResult.java b/direct-query/src/main/java/org/opensearch/sql/directquery/transport/model/datasource/PrometheusResult.java
index 09ff30598d8..ab8c67c6a32 100644
--- a/direct-query/src/main/java/org/opensearch/sql/directquery/transport/model/datasource/PrometheusResult.java
+++ b/direct-query/src/main/java/org/opensearch/sql/directquery/transport/model/datasource/PrometheusResult.java
@@ -7,6 +7,7 @@
 
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.annotation.JsonTypeName;
 import java.util.List;
 import java.util.Map;
@@ -22,6 +23,7 @@
 @Getter
 @Setter
 @JsonTypeName("prometheus")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NONE)
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class PrometheusResult implements DataSourceResult {
 
diff --git a/direct-query/src/test/java/org/opensearch/sql/directquery/transport/model/ExecuteDirectQueryActionResponseTest.java b/direct-query/src/test/java/org/opensearch/sql/directquery/transport/model/ExecuteDirectQueryActionResponseTest.java
index 9f4ab5fa9e1..e19bc1a143e 100644
--- a/direct-query/src/test/java/org/opensearch/sql/directquery/transport/model/ExecuteDirectQueryActionResponseTest.java
+++ b/direct-query/src/test/java/org/opensearch/sql/directquery/transport/model/ExecuteDirectQueryActionResponseTest.java
@@ -287,4 +287,30 @@ public void testConstructorWithPrometheusError() throws IOException {
     PrometheusResult result = (PrometheusResult) response.getResults().get(dataSourceName);
     assertNotNull(result);
   }
+
+  @Test
+  public void testPrometheusResultWithTypeLabelInMetric() throws IOException {
+    // Regression test: metrics containing a label named "type" should not cause
+    // InvalidTypeIdException during deserialization (GitHub #5684)
+    String queryId = "query-type-label";
+    String sessionId = "session-type-label";
+    String rawResult =
+        "{\"resultType\":\"vector\",\"result\":[{\"metric\":"
+            + "{\"__name__\":\"cpu_usage\",\"type\":\"gauge\",\"instance\":\"localhost:9090\"},"
+            + "\"value\":[1625000000,\"0.5\"]}]}";
+    String dataSourceName = "prom-with-type-label";
+    String dataSourceType = "prometheus";
+
+    ExecuteDirectQueryActionResponse response =
+        new ExecuteDirectQueryActionResponse(
+            queryId, rawResult, sessionId, dataSourceName, dataSourceType);
+
+    assertEquals(queryId, response.getQueryId());
+    assertEquals(1, response.getResults().size());
+    assertInstanceOf(PrometheusResult.class, response.getResults().get(dataSourceName));
+    PrometheusResult result = (PrometheusResult) response.getResults().get(dataSourceName);
+    assertNotNull(result.getResult());
+    assertEquals(1, result.getResult().size());
+    assertEquals("gauge", result.getResult().get(0).getMetric().get("type"));
+  }
 }
\ No newline at end of file