diff --git a/src/render/index.ts b/src/render/index.ts
index de6ca96..edc8fe1 100644
--- a/src/render/index.ts
+++ b/src/render/index.ts
@@ -88,6 +88,8 @@ export default class Renderer {
   async renderStream(stream: AsyncIterableStream<TextStreamPart<ToolSet>>) {
     this.resetCounts();
 
+    let reasonStart = 0;
+
     const spin = spinner({ withGuide: false, indicator: "timer" });
     if (!this.isPlain) {
       spin.start("Waiting for response");
@@ -96,6 +98,7 @@ export default class Renderer {
     for await (const part of stream) {
       switch (part.type) {
         case "reasoning-start": {
+          reasonStart = Date.now();
           spin.clear();
           if (supportsColorStderr)
             this.write(
@@ -118,6 +121,8 @@ export default class Renderer {
           } else {
             this.write("\n--- Done Thinking ---\n", process.stderr);
           }
+          const time = (Date.now() - reasonStart) / 1000;
+          this.write(`Thought for ${time.toFixed(2)}s\n`, process.stderr);
 
           if (supportsColorStderr)
             this.write(