diff --git a/core/src/main/java/com/google/adk/events/Event.java b/core/src/main/java/com/google/adk/events/Event.java
index b6141f569..d56a0ab68 100644
--- a/core/src/main/java/com/google/adk/events/Event.java
+++ b/core/src/main/java/com/google/adk/events/Event.java
@@ -30,6 +30,7 @@
 import com.google.genai.types.FinishReason;
 import com.google.genai.types.FunctionCall;
 import com.google.genai.types.FunctionResponse;
+import com.google.genai.types.GenerateContentResponseUsageMetadata;
 import com.google.genai.types.GroundingMetadata;
 import java.time.Instant;
 import java.util.List;
@@ -54,6 +55,9 @@ public class Event extends JsonBaseModel {
   private Optional<Boolean> turnComplete = Optional.empty();
   private Optional<FinishReason> errorCode = Optional.empty();
   private Optional<String> errorMessage = Optional.empty();
+  private Optional<FinishReason> finishReason = Optional.empty();
+  private Optional<GenerateContentResponseUsageMetadata> usageMetadata = Optional.empty();
+  private Optional<Double> avgLogprobs = Optional.empty();
   private Optional<Boolean> interrupted = Optional.empty();
   private Optional<String> branch = Optional.empty();
   private Optional<GroundingMetadata> groundingMetadata = Optional.empty();
@@ -153,10 +157,19 @@ public Optional<FinishReason> errorCode() {
     return errorCode;
   }
 
+  @JsonProperty("finishReason")
+  public Optional<FinishReason> finishReason() {
+    return finishReason;
+  }
+
   public void setErrorCode(Optional<FinishReason> errorCode) {
     this.errorCode = errorCode;
   }
 
+  public void setFinishReason(Optional<FinishReason> finishReason) {
+    this.finishReason = finishReason;
+  }
+
   @JsonProperty("errorMessage")
   public Optional<String> errorMessage() {
     return errorMessage;
@@ -166,6 +179,24 @@ public void setErrorMessage(Optional<String> errorMessage) {
     this.errorMessage = errorMessage;
   }
 
+  @JsonProperty("usageMetadata")
+  public Optional<GenerateContentResponseUsageMetadata> usageMetadata() {
+    return usageMetadata;
+  }
+
+  public void setUsageMetadata(Optional<GenerateContentResponseUsageMetadata> usageMetadata) {
+    this.usageMetadata = usageMetadata;
+  }
+
+  @JsonProperty("avgLogprobs")
+  public Optional<Double> avgLogprobs() {
+    return avgLogprobs;
+  }
+
+  public void setAvgLogprobs(Optional<Double> avgLogprobs) {
+    this.avgLogprobs = avgLogprobs;
+  }
+
   @JsonProperty("interrupted")
   public Optional<Boolean> interrupted() {
     return interrupted;
@@ -299,6 +330,9 @@ public static class Builder {
     private Optional<Boolean> turnComplete = Optional.empty();
     private Optional<FinishReason> errorCode = Optional.empty();
     private Optional<String> errorMessage = Optional.empty();
+    private Optional<FinishReason> finishReason = Optional.empty();
+    private Optional<GenerateContentResponseUsageMetadata> usageMetadata = Optional.empty();
+    private Optional<Double> avgLogprobs = Optional.empty();
     private Optional<Boolean> interrupted = Optional.empty();
     private Optional<String> branch = Optional.empty();
     private Optional<GroundingMetadata> groundingMetadata = Optional.empty();
@@ -419,6 +453,45 @@ public Builder errorMessage(Optional<String> value) {
       return this;
     }
 
+    @CanIgnoreReturnValue
+    @JsonProperty("finishReason")
+    public Builder finishReason(@Nullable FinishReason value) {
+      this.finishReason = Optional.ofNullable(value);
+      return this;
+    }
+
+    @CanIgnoreReturnValue
+    public Builder finishReason(Optional<FinishReason> value) {
+      this.finishReason = value;
+      return this;
+    }
+
+    @CanIgnoreReturnValue
+    @JsonProperty("usageMetadata")
+    public Builder usageMetadata(@Nullable GenerateContentResponseUsageMetadata value) {
+      this.usageMetadata = Optional.ofNullable(value);
+      return this;
+    }
+
+    @CanIgnoreReturnValue
+    public Builder usageMetadata(Optional<GenerateContentResponseUsageMetadata> value) {
+      this.usageMetadata = value;
+      return this;
+    }
+
+    @CanIgnoreReturnValue
+    @JsonProperty("avgLogprobs")
+    public Builder avgLogprobs(@Nullable Double value) {
+      this.avgLogprobs = Optional.ofNullable(value);
+      return this;
+    }
+
+    @CanIgnoreReturnValue
+    public Builder avgLogprobs(Optional<Double> value) {
+      this.avgLogprobs = value;
+      return this;
+    }
+
     @CanIgnoreReturnValue
     @JsonProperty("interrupted")
     public Builder interrupted(@Nullable Boolean value) {
@@ -496,10 +569,12 @@ public Event build() {
       event.setTurnComplete(turnComplete);
       event.setErrorCode(errorCode);
       event.setErrorMessage(errorMessage);
+      event.setFinishReason(finishReason);
+      event.setUsageMetadata(usageMetadata);
+      event.setAvgLogprobs(avgLogprobs);
       event.setInterrupted(interrupted);
       event.branch(branch);
       event.setGroundingMetadata(groundingMetadata);
-
       event.setActions(actions().orElse(EventActions.builder().build()));
       event.setTimestamp(timestamp().orElse(Instant.now().toEpochMilli()));
       return event;
@@ -529,6 +604,9 @@ public Builder toBuilder() {
             .turnComplete(this.turnComplete)
             .errorCode(this.errorCode)
             .errorMessage(this.errorMessage)
+            .finishReason(this.finishReason)
+            .usageMetadata(this.usageMetadata)
+            .avgLogprobs(this.avgLogprobs)
             .interrupted(this.interrupted)
             .branch(this.branch)
             .groundingMetadata(this.groundingMetadata);
@@ -557,6 +635,9 @@ public boolean equals(Object obj) {
         && Objects.equals(turnComplete, other.turnComplete)
         && Objects.equals(errorCode, other.errorCode)
         && Objects.equals(errorMessage, other.errorMessage)
+        && Objects.equals(finishReason, other.finishReason)
+        && Objects.equals(usageMetadata, other.usageMetadata)
+        && Objects.equals(avgLogprobs, other.avgLogprobs)
         && Objects.equals(interrupted, other.interrupted)
         && Objects.equals(branch, other.branch)
         && Objects.equals(groundingMetadata, other.groundingMetadata);
@@ -580,6 +661,9 @@ public int hashCode() {
         turnComplete,
         errorCode,
         errorMessage,
+        finishReason,
+        usageMetadata,
+        avgLogprobs,
         interrupted,
         branch,
         groundingMetadata,
diff --git a/core/src/main/java/com/google/adk/flows/llmflows/BaseLlmFlow.java b/core/src/main/java/com/google/adk/flows/llmflows/BaseLlmFlow.java
index 34114d004..5c7dad328 100644
--- a/core/src/main/java/com/google/adk/flows/llmflows/BaseLlmFlow.java
+++ b/core/src/main/java/com/google/adk/flows/llmflows/BaseLlmFlow.java
@@ -633,7 +633,10 @@ private Event buildModelResponseEvent(
             .errorMessage(llmResponse.errorMessage())
             .interrupted(llmResponse.interrupted())
             .turnComplete(llmResponse.turnComplete())
-            .groundingMetadata(llmResponse.groundingMetadata());
+            .groundingMetadata(llmResponse.groundingMetadata())
+            .avgLogprobs(llmResponse.avgLogprobs())
+            .finishReason(llmResponse.finishReason())
+            .usageMetadata(llmResponse.usageMetadata());
 
     Event event = eventBuilder.build();
 
diff --git a/core/src/main/java/com/google/adk/models/LlmResponse.java b/core/src/main/java/com/google/adk/models/LlmResponse.java
index 0d748d1f3..0a8c2806d 100644
--- a/core/src/main/java/com/google/adk/models/LlmResponse.java
+++ b/core/src/main/java/com/google/adk/models/LlmResponse.java
@@ -79,6 +79,14 @@ public abstract class LlmResponse extends JsonBaseModel {
   @JsonProperty("errorCode")
   public abstract Optional<FinishReason> errorCode();
 
+  /** Error code if the response is an error. Code varies by model. */
+  @JsonProperty("finishReason")
+  public abstract Optional<FinishReason> finishReason();
+
+  /** Error code if the response is an error. Code varies by model. */
+  @JsonProperty("avgLogprobs")
+  public abstract Optional<Double> avgLogprobs();
+
   /** Error message if the response is an error. */
   @JsonProperty("errorMessage")
   public abstract Optional<String> errorMessage();
@@ -136,6 +144,16 @@ static LlmResponse.Builder jacksonBuilder() {
 
     public abstract Builder errorCode(Optional<FinishReason> errorCode);
 
+    @JsonProperty("finishReason")
+    public abstract Builder finishReason(@Nullable FinishReason finishReason);
+
+    public abstract Builder finishReason(Optional<FinishReason> finishReason);
+
+    @JsonProperty("avgLogprobs")
+    public abstract Builder avgLogprobs(@Nullable Double avgLogprobs);
+
+    public abstract Builder avgLogprobs(Optional<Double> avgLogprobs);
+
     @JsonProperty("errorMessage")
     public abstract Builder errorMessage(@Nullable String errorMessage);
 
diff --git a/core/src/test/java/com/google/adk/events/EventTest.java b/core/src/test/java/com/google/adk/events/EventTest.java
index 358ac8bdf..f443abee5 100644
--- a/core/src/test/java/com/google/adk/events/EventTest.java
+++ b/core/src/test/java/com/google/adk/events/EventTest.java
@@ -24,6 +24,7 @@
 import com.google.genai.types.Content;
 import com.google.genai.types.FinishReason;
 import com.google.genai.types.FunctionCall;
+import com.google.genai.types.GenerateContentResponseUsageMetadata;
 import com.google.genai.types.Part;
 import java.time.Instant;
 import java.util.concurrent.ConcurrentHashMap;
@@ -67,6 +68,14 @@ public final class EventTest {
           .turnComplete(true)
           .errorCode(new FinishReason("error_code"))
           .errorMessage("error_message")
+          .finishReason(new FinishReason("finish_reason"))
+          .usageMetadata(
+              GenerateContentResponseUsageMetadata.builder()
+                  .promptTokenCount(10)
+                  .candidatesTokenCount(20)
+                  .totalTokenCount(30)
+                  .build())
+          .avgLogprobs(0.5)
           .interrupted(true)
           .timestamp(123456789L)
           .build();
@@ -80,6 +89,15 @@ public void event_builder_works() {
     assertThat(EVENT.turnComplete().get()).isTrue();
     assertThat(EVENT.errorCode()).hasValue(new FinishReason("error_code"));
     assertThat(EVENT.errorMessage()).hasValue("error_message");
+    assertThat(EVENT.finishReason()).hasValue(new FinishReason("finish_reason"));
+    assertThat(EVENT.usageMetadata())
+        .hasValue(
+            GenerateContentResponseUsageMetadata.builder()
+                .promptTokenCount(10)
+                .candidatesTokenCount(20)
+                .totalTokenCount(30)
+                .build());
+    assertThat(EVENT.avgLogprobs()).hasValue(0.5);
     assertThat(EVENT.interrupted()).hasValue(true);
     assertThat(EVENT.timestamp()).isEqualTo(123456789L);
     assertThat(EVENT.actions()).isEqualTo(EVENT_ACTIONS);
diff --git a/core/src/test/java/com/google/adk/flows/llmflows/BaseLlmFlowTest.java b/core/src/test/java/com/google/adk/flows/llmflows/BaseLlmFlowTest.java
index 700a9c0c4..37a043930 100644
--- a/core/src/test/java/com/google/adk/flows/llmflows/BaseLlmFlowTest.java
+++ b/core/src/test/java/com/google/adk/flows/llmflows/BaseLlmFlowTest.java
@@ -37,7 +37,9 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.genai.types.Content;
+import com.google.genai.types.FinishReason;
 import com.google.genai.types.FunctionDeclaration;
+import com.google.genai.types.GenerateContentResponseUsageMetadata;
 import com.google.genai.types.Part;
 import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.core.Single;
@@ -63,7 +65,44 @@ public void run_singleTextResponse_returnsSingleEvent() {
     List<Event> events = baseLlmFlow.run(invocationContext).toList().blockingGet();
 
     assertThat(events).hasSize(1);
-    assertThat(getOnlyElement(events).content()).hasValue(content);
+    Event event = getOnlyElement(events);
+    assertThat(event.content()).hasValue(content);
+    assertThat(event.avgLogprobs()).isEmpty();
+    assertThat(event.finishReason()).isEmpty();
+    assertThat(event.usageMetadata()).isEmpty();
+  }
+
+  @Test
+  public void run_singleTextResponse_withMetadata_returnsSingleEventWithMetadata() {
+    Content content = Content.fromParts(Part.fromText("LLM response"));
+    LlmResponse llmResponse =
+        LlmResponse.builder()
+            .content(content)
+            .avgLogprobs(-0.123)
+            .finishReason(new FinishReason(FinishReason.Known.STOP))
+            .usageMetadata(
+                GenerateContentResponseUsageMetadata.builder()
+                    .promptTokenCount(10)
+                    .candidatesTokenCount(20)
+                    .build())
+            .build();
+    TestLlm testLlm = createTestLlm(llmResponse);
+    InvocationContext invocationContext = createInvocationContext(createTestAgent(testLlm));
+    BaseLlmFlow baseLlmFlow = createBaseLlmFlowWithoutProcessors();
+
+    List<Event> events = baseLlmFlow.run(invocationContext).toList().blockingGet();
+
+    assertThat(events).hasSize(1);
+    Event event = getOnlyElement(events);
+    assertThat(event.content()).hasValue(content);
+    assertThat(event.avgLogprobs()).hasValue(-0.123);
+    assertThat(event.finishReason()).hasValue(new FinishReason(FinishReason.Known.STOP));
+    assertThat(event.usageMetadata())
+        .hasValue(
+            GenerateContentResponseUsageMetadata.builder()
+                .promptTokenCount(10)
+                .candidatesTokenCount(20)
+                .build());
   }
 
   @Test