diff --git a/codex-rs/analytics/src/analytics_client.rs b/codex-rs/analytics/src/analytics_client.rs
index 32b91205a8..b856118899 100644
--- a/codex-rs/analytics/src/analytics_client.rs
+++ b/codex-rs/analytics/src/analytics_client.rs
@@ -149,6 +149,9 @@ pub struct AnalyticsReducer {
 
 struct ConnectionState {
     product_client_id: String,
+    client_name: Option<String>,
+    client_version: Option<String>,
+    experimental_api_enabled: Option<bool>,
 }
 
 #[derive(Clone)]
@@ -377,6 +380,9 @@ struct SkillInvocationEventParams {
 struct CodexThreadInitializedEventParams {
     thread_id: String,
     product_client_id: String,
+    client_name: Option<String>,
+    client_version: Option<String>,
+    experimental_api_enabled: Option<bool>,
     model: String,
     ephemeral: bool,
     session_source: Option<&'static str>,
@@ -492,7 +498,12 @@ impl AnalyticsReducer {
         self.connections.insert(
             connection_id,
             ConnectionState {
-                product_client_id: params.client_info.name,
+                product_client_id: params.client_info.name.clone(),
+                client_name: Some(params.client_info.name),
+                client_version: Some(params.client_info.version),
+                experimental_api_enabled: params
+                    .capabilities
+                    .map(|capabilities| capabilities.experimental_api),
             },
         );
     }
@@ -506,10 +517,7 @@ impl AnalyticsReducer {
             return;
         };
         out.push(TrackEventRequest::CodexThreadInitialized(
-            codex_thread_initialized_event_request(
-                connection_state.product_client_id.clone(),
-                input,
-            ),
+            codex_thread_initialized_event_request(connection_state, input),
         ));
     }
 
@@ -666,22 +674,25 @@ fn codex_app_metadata(tracking: &TrackEventsContext, app: AppInvocation) -> Code
 }
 
 fn codex_thread_initialized_event_request(
-    product_client_id: String,
+    connection_state: &ConnectionState,
     input: ThreadInitializedInput,
 ) -> CodexThreadInitializedEvent {
     CodexThreadInitializedEvent {
         event_type: "codex_thread_initialized",
-        event_params: codex_thread_initialized_event_params(product_client_id, input),
+        event_params: codex_thread_initialized_event_params(connection_state, input),
     }
 }
 
 fn codex_thread_initialized_event_params(
-    product_client_id: String,
+    connection_state: &ConnectionState,
     input: ThreadInitializedInput,
 ) -> CodexThreadInitializedEventParams {
     CodexThreadInitializedEventParams {
         thread_id: input.thread_id,
-        product_client_id,
+        product_client_id: connection_state.product_client_id.clone(),
+        client_name: connection_state.client_name.clone(),
+        client_version: connection_state.client_version.clone(),
+        experimental_api_enabled: connection_state.experimental_api_enabled,
         model: input.model,
         ephemeral: input.ephemeral,
         session_source: session_source_name(&input.session_source),
diff --git a/codex-rs/analytics/src/analytics_client_tests.rs b/codex-rs/analytics/src/analytics_client_tests.rs
index 6156015bef..431453ca51 100644
--- a/codex-rs/analytics/src/analytics_client_tests.rs
+++ b/codex-rs/analytics/src/analytics_client_tests.rs
@@ -20,6 +20,7 @@ use codex_app_server_protocol::ApprovalsReviewer as AppServerApprovalsReviewer;
 use codex_app_server_protocol::AskForApproval as AppServerAskForApproval;
 use codex_app_server_protocol::ClientInfo;
 use codex_app_server_protocol::ClientResponse;
+use codex_app_server_protocol::InitializeCapabilities;
 use codex_app_server_protocol::InitializeParams;
 use codex_app_server_protocol::RequestId;
 use codex_app_server_protocol::SandboxPolicy as AppServerSandboxPolicy;
@@ -262,7 +263,12 @@ fn app_used_dedupe_is_keyed_by_turn_and_connector() {
 #[test]
 fn thread_initialized_event_serializes_expected_shape() {
     let event = TrackEventRequest::CodexThreadInitialized(codex_thread_initialized_event_request(
-        "codex-tui".to_string(),
+        &super::ConnectionState {
+            product_client_id: "codex-tui".to_string(),
+            client_name: Some("codex-tui".to_string()),
+            client_version: Some("1.0.0".to_string()),
+            experimental_api_enabled: Some(true),
+        },
         ThreadInitializedInput {
             connection_id: 1,
             thread_id: "thread-0".to_string(),
@@ -282,6 +288,9 @@ fn thread_initialized_event_serializes_expected_shape() {
             "event_params": {
                 "thread_id": "thread-0",
                 "product_client_id": "codex-tui",
+                "client_name": "codex-tui",
+                "client_version": "1.0.0",
+                "experimental_api_enabled": true,
                 "model": "gpt-5",
                 "ephemeral": true,
                 "session_source": "user",
@@ -325,7 +334,10 @@ async fn initialize_caches_client_and_thread_lifecycle_publishes_once_initialize
                         title: None,
                         version: "1.0.0".to_string(),
                     },
-                    capabilities: None,
+                    capabilities: Some(InitializeCapabilities {
+                        experimental_api: false,
+                        opt_out_notification_methods: None,
+                    }),
                 },
             },
             &mut events,
@@ -347,6 +359,12 @@ async fn initialize_caches_client_and_thread_lifecycle_publishes_once_initialize
     assert_eq!(payload.as_array().expect("events array").len(), 1);
     assert_eq!(payload[0]["event_type"], "codex_thread_initialized");
     assert_eq!(payload[0]["event_params"]["product_client_id"], "codex-tui");
+    assert_eq!(payload[0]["event_params"]["client_name"], "codex-tui");
+    assert_eq!(payload[0]["event_params"]["client_version"], "1.0.0");
+    assert_eq!(
+        payload[0]["event_params"]["experimental_api_enabled"],
+        false
+    );
     assert_eq!(payload[0]["event_params"]["initialization_mode"], "resumed");
     assert_eq!(payload[0]["event_params"]["session_source"], "user");
     assert_eq!(payload[0]["event_params"]["subagent_source"], json!(null));