diff --git a/src/main/java/com/google/genai/types/ClientOptions.java b/src/main/java/com/google/genai/types/ClientOptions.java
index f6827d7a83b..74b753cef26 100644
--- a/src/main/java/com/google/genai/types/ClientOptions.java
+++ b/src/main/java/com/google/genai/types/ClientOptions.java
@@ -19,6 +19,7 @@
 package com.google.genai.types;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.google.auto.value.AutoValue;
@@ -42,6 +43,10 @@ public abstract class ClientOptions extends JsonSerializable {
   @JsonProperty("proxyOptions")
   public abstract Optional<ProxyOptions> proxyOptions();
 
+  /** The executor to use for running async stream handler callbacks. */
+  @JsonIgnore
+  public abstract Optional<java.util.concurrent.Executor> streamHandlerExecutor();
+
   /** Instantiates a builder for ClientOptions. */
   @ExcludeFromGeneratedCoverageReport
   public static Builder builder() {
@@ -124,6 +129,26 @@ public Builder clearProxyOptions() {
       return proxyOptions(Optional.empty());
     }
 
+    /**
+     * Setter for streamHandlerExecutor.
+     *
+     * <p>streamHandlerExecutor: The executor to use for running async stream handler callbacks.
+     */
+    @JsonIgnore
+    public abstract Builder streamHandlerExecutor(
+        java.util.concurrent.Executor streamHandlerExecutor);
+
+    @ExcludeFromGeneratedCoverageReport
+    abstract Builder streamHandlerExecutor(
+        Optional<java.util.concurrent.Executor> streamHandlerExecutor);
+
+    /** Clears the value of streamHandlerExecutor field. */
+    @ExcludeFromGeneratedCoverageReport
+    @CanIgnoreReturnValue
+    public Builder clearStreamHandlerExecutor() {
+      return streamHandlerExecutor(Optional.empty());
+    }
+
     public abstract ClientOptions build();
   }