diff --git a/contrib/langchain4j/src/test/java/com/google/adk/models/langchain4j/RunLoop.java b/contrib/langchain4j/src/test/java/com/google/adk/models/langchain4j/RunLoop.java
index 04a2aa585..ede7300fe 100644
--- a/contrib/langchain4j/src/test/java/com/google/adk/models/langchain4j/RunLoop.java
+++ b/contrib/langchain4j/src/test/java/com/google/adk/models/langchain4j/RunLoop.java
@@ -53,7 +53,8 @@ public static List<Event> runLoop(BaseAgent agent, boolean streaming, Object...
       allEvents.addAll(
           runner
               .runAsync(
-                  session,
+                  session.userId(),
+                  session.id(),
                   messageContent,
                   RunConfig.builder()
                       .setStreamingMode(
diff --git a/contrib/spring-ai/src/test/java/com/google/adk/models/springai/SpringAIIntegrationTest.java b/contrib/spring-ai/src/test/java/com/google/adk/models/springai/SpringAIIntegrationTest.java
index 6843c8eaa..11b17ebf1 100644
--- a/contrib/spring-ai/src/test/java/com/google/adk/models/springai/SpringAIIntegrationTest.java
+++ b/contrib/spring-ai/src/test/java/com/google/adk/models/springai/SpringAIIntegrationTest.java
@@ -18,6 +18,7 @@
 import static org.junit.jupiter.api.Assertions.*;
 
 import com.google.adk.agents.LlmAgent;
+import com.google.adk.agents.RunConfig;
 import com.google.adk.events.Event;
 import com.google.adk.models.springai.integrations.tools.WeatherTool;
 import com.google.adk.runner.InMemoryRunner;
@@ -73,14 +74,15 @@ public ChatResponse call(Prompt prompt) {
 
     // when
     Runner runner = new InMemoryRunner(agent);
-    Session session = runner.sessionService().createSession("test-app", "test-user").blockingGet();
+    Session session =
+        runner.sessionService().createSession(agent.name(), "test-user").blockingGet();
 
     Content userMessage =
         Content.builder().role("user").parts(List.of(Part.fromText("What is a qubit?"))).build();
 
     List<Event> events =
         runner
-            .runAsync(session, userMessage, com.google.adk.agents.RunConfig.builder().build())
+            .runAsync(session.userId(), session.id(), userMessage, RunConfig.builder().build())
             .toList()
             .blockingGet();
 
@@ -149,7 +151,8 @@ public ChatResponse call(Prompt prompt) {
 
     // when
     Runner runner = new InMemoryRunner(agent);
-    Session session = runner.sessionService().createSession("test-app", "test-user").blockingGet();
+    Session session =
+        runner.sessionService().createSession(agent.name(), "test-user").blockingGet();
 
     Content userMessage =
         Content.builder()
@@ -159,7 +162,7 @@ public ChatResponse call(Prompt prompt) {
 
     List<Event> events =
         runner
-            .runAsync(session, userMessage, com.google.adk.agents.RunConfig.builder().build())
+            .runAsync(session.userId(), session.id(), userMessage, RunConfig.builder().build())
             .toList()
             .blockingGet();
 
@@ -217,7 +220,8 @@ public Flux<ChatResponse> stream(Prompt prompt) {
 
     // when
     Runner runner = new InMemoryRunner(agent);
-    Session session = runner.sessionService().createSession("test-app", "test-user").blockingGet();
+    Session session =
+        runner.sessionService().createSession(agent.name(), "test-user").blockingGet();
 
     Content userMessage =
         Content.builder()
@@ -228,11 +232,10 @@ public Flux<ChatResponse> stream(Prompt prompt) {
     List<Event> events =
         runner
             .runAsync(
-                session,
+                session.userId(),
+                session.id(),
                 userMessage,
-                com.google.adk.agents.RunConfig.builder()
-                    .setStreamingMode(com.google.adk.agents.RunConfig.StreamingMode.SSE)
-                    .build())
+                RunConfig.builder().setStreamingMode(RunConfig.StreamingMode.SSE).build())
             .toList()
             .blockingGet();
 
diff --git a/contrib/spring-ai/src/test/java/com/google/adk/models/springai/TestUtils.java b/contrib/spring-ai/src/test/java/com/google/adk/models/springai/TestUtils.java
index f18ded055..891dcd62d 100644
--- a/contrib/spring-ai/src/test/java/com/google/adk/models/springai/TestUtils.java
+++ b/contrib/spring-ai/src/test/java/com/google/adk/models/springai/TestUtils.java
@@ -46,7 +46,8 @@ public static List<Event> askAgent(BaseAgent agent, boolean streaming, Object...
       allEvents.addAll(
           runner
               .runAsync(
-                  session,
+                  session.userId(),
+                  session.id(),
                   messageContent,
                   RunConfig.builder()
                       .setStreamingMode(
@@ -67,13 +68,17 @@ public static List<Event> askBlockingAgent(BaseAgent agent, Object... messages)
     }
 
     Runner runner = new InMemoryRunner(agent);
-    Session session = runner.sessionService().createSession("test-app", "test-user").blockingGet();
+    Session session =
+        runner.sessionService().createSession(agent.name(), "test-user").blockingGet();
 
     List<Event> events = new ArrayList<>();
 
     for (Content content : contents) {
       List<Event> batchEvents =
-          runner.runAsync(session, content, RunConfig.builder().build()).toList().blockingGet();
+          runner
+              .runAsync(session.userId(), session.id(), content, RunConfig.builder().build())
+              .toList()
+              .blockingGet();
       events.addAll(batchEvents);
     }
 
@@ -88,7 +93,8 @@ public static List<Event> askAgentStreaming(BaseAgent agent, Object... messages)
     }
 
     Runner runner = new InMemoryRunner(agent);
-    Session session = runner.sessionService().createSession("test-app", "test-user").blockingGet();
+    Session session =
+        runner.sessionService().createSession(agent.name(), "test-user").blockingGet();
 
     List<Event> events = new ArrayList<>();
 
@@ -96,7 +102,8 @@ public static List<Event> askAgentStreaming(BaseAgent agent, Object... messages)
       List<Event> batchEvents =
           runner
               .runAsync(
-                  session,
+                  session.userId(),
+                  session.id(),
                   content,
                   RunConfig.builder().setStreamingMode(RunConfig.StreamingMode.SSE).build())
               .toList()
diff --git a/core/src/main/java/com/google/adk/runner/Runner.java b/core/src/main/java/com/google/adk/runner/Runner.java
index 29b2b76d3..0fd8bb92e 100644
--- a/core/src/main/java/com/google/adk/runner/Runner.java
+++ b/core/src/main/java/com/google/adk/runner/Runner.java
@@ -415,35 +415,6 @@ public Flowable<Event> runAsync(String userId, String sessionId, Content newMess
     return runAsync(userId, sessionId, newMessage, RunConfig.builder().build());
   }
 
-  /**
-   * See {@link #runAsync(Session, Content, RunConfig, Map)}.
-   *
-   * @deprecated Use runAsync with sessionId.
-   */
-  @Deprecated(since = "0.4.0", forRemoval = true)
-  public Flowable<Event> runAsync(Session session, Content newMessage, RunConfig runConfig) {
-    return runAsync(session, newMessage, runConfig, /* stateDelta= */ null);
-  }
-
-  /**
-   * Runs the agent asynchronously using a provided Session object.
-   *
-   * @param session The session to run the agent in.
-   * @param newMessage The new message from the user to process.
-   * @param runConfig Configuration for the agent run.
-   * @param stateDelta Optional map of state updates to merge into the session for this run.
-   * @return A Flowable stream of {@link Event} objects generated by the agent during execution.
-   * @deprecated Use runAsync with sessionId.
-   */
-  @Deprecated(since = "0.4.0", forRemoval = true)
-  public Flowable<Event> runAsync(
-      Session session,
-      Content newMessage,
-      RunConfig runConfig,
-      @Nullable Map<String, Object> stateDelta) {
-    return runAsyncImpl(session, newMessage, runConfig, stateDelta);
-  }
-
   /**
    * Runs the agent asynchronously using a provided Session object.
    *
@@ -710,18 +681,6 @@ public Flowable<Event> runLive(
     return runLive(sessionKey.userId(), sessionKey.id(), liveRequestQueue, runConfig);
   }
 
-  /**
-   * Runs the agent asynchronously with a default user ID.
-   *
-   * @return stream of generated events.
-   */
-  @Deprecated(since = "0.5.0", forRemoval = true)
-  public Flowable<Event> runWithSessionId(
-      String sessionId, Content newMessage, RunConfig runConfig) {
-    // TODO(b/410859954): Add user_id to getter or method signature. Assuming "tmp-user" for now.
-    return this.runAsync("tmp-user", sessionId, newMessage, runConfig);
-  }
-
   /**
    * Checks if the agent and its parent chain allow transfer up the tree.
    *