diff --git a/codex-rs/exec/src/event_processor_with_jsonl_output.rs b/codex-rs/exec/src/event_processor_with_jsonl_output.rs
index ba1e8cde2..1641398ae 100644
--- a/codex-rs/exec/src/event_processor_with_jsonl_output.rs
+++ b/codex-rs/exec/src/event_processor_with_jsonl_output.rs
@@ -122,6 +122,7 @@ impl EventProcessorWithJsonOutput {
             input_tokens: usage.total.input_tokens,
             cached_input_tokens: usage.total.cached_input_tokens,
             output_tokens: usage.total.output_tokens,
+            reasoning_output_tokens: usage.total.reasoning_output_tokens,
         }
     }
 
diff --git a/codex-rs/exec/src/exec_events.rs b/codex-rs/exec/src/exec_events.rs
index d356a6a70..4a84ef749 100644
--- a/codex-rs/exec/src/exec_events.rs
+++ b/codex-rs/exec/src/exec_events.rs
@@ -65,6 +65,8 @@ pub struct Usage {
     pub cached_input_tokens: i64,
     /// The number of output tokens used during the turn.
     pub output_tokens: i64,
+    /// The number of reasoning output tokens used during the turn.
+    pub reasoning_output_tokens: i64,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, TS)]
diff --git a/codex-rs/exec/tests/event_processor_with_json_output.rs b/codex-rs/exec/tests/event_processor_with_json_output.rs
index e894b8f4e..3a7b5d0fc 100644
--- a/codex-rs/exec/tests/event_processor_with_json_output.rs
+++ b/codex-rs/exec/tests/event_processor_with_json_output.rs
@@ -1232,6 +1232,7 @@ fn token_usage_update_is_emitted_on_turn_completion() {
                     input_tokens: 10,
                     cached_input_tokens: 3,
                     output_tokens: 29,
+                    reasoning_output_tokens: 7,
                 },
             })],
             status: CodexStatus::InitiateShutdown,
diff --git a/sdk/typescript/samples/basic_streaming.ts b/sdk/typescript/samples/basic_streaming.ts
index f9ccbe40d..76a67d494 100755
--- a/sdk/typescript/samples/basic_streaming.ts
+++ b/sdk/typescript/samples/basic_streaming.ts
@@ -56,7 +56,7 @@ const handleEvent = (event: ThreadEvent): void => {
       break;
     case "turn.completed":
       console.log(
-        `Used ${event.usage.input_tokens} input tokens, ${event.usage.cached_input_tokens} cached input tokens, ${event.usage.output_tokens} output tokens.`,
+        `Used ${event.usage.input_tokens} input tokens, ${event.usage.cached_input_tokens} cached input tokens, ${event.usage.output_tokens} output tokens, ${event.usage.reasoning_output_tokens} reasoning output tokens.`,
       );
       break;
     case "turn.failed":
diff --git a/sdk/typescript/src/events.ts b/sdk/typescript/src/events.ts
index b8adcfb4b..3af78c9b5 100644
--- a/sdk/typescript/src/events.ts
+++ b/sdk/typescript/src/events.ts
@@ -25,6 +25,8 @@ export type Usage = {
   cached_input_tokens: number;
   /** The number of output tokens used during the turn. */
   output_tokens: number;
+  /** The number of reasoning output tokens used during the turn. */
+  reasoning_output_tokens: number;
 };
 
 /** Emitted when a turn is completed. Typically right after the assistant's response. */
diff --git a/sdk/typescript/tests/run.test.ts b/sdk/typescript/tests/run.test.ts
index 7af8126e7..27fd1120e 100644
--- a/sdk/typescript/tests/run.test.ts
+++ b/sdk/typescript/tests/run.test.ts
@@ -40,6 +40,7 @@ describe("Codex", () => {
         cached_input_tokens: 12,
         input_tokens: 42,
         output_tokens: 5,
+        reasoning_output_tokens: 0,
       });
       expect(thread.id).toEqual(expect.any(String));
     } finally {
diff --git a/sdk/typescript/tests/runStreamed.test.ts b/sdk/typescript/tests/runStreamed.test.ts
index 3eb0552d3..c99c1a689 100644
--- a/sdk/typescript/tests/runStreamed.test.ts
+++ b/sdk/typescript/tests/runStreamed.test.ts
@@ -50,6 +50,7 @@ describe("Codex", () => {
             cached_input_tokens: 12,
             input_tokens: 42,
             output_tokens: 5,
+            reasoning_output_tokens: 0,
           },
         },
       ]);