diff --git a/package-lock.json b/package-lock.json
index 335f510f9ef..0518d72adc8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,13 +15,12 @@
                 "plugins/*"
             ],
             "dependencies": {
-                "@aws-toolkits/telemetry": "^1.0.242",
                 "@types/node": "^22.7.5",
                 "vscode-nls": "^5.2.0",
                 "vscode-nls-dev": "^4.0.4"
             },
             "devDependencies": {
-                "@aws-toolkits/telemetry": "^1.0.274",
+                "@aws-toolkits/telemetry": "^1.0.282",
                 "@playwright/browser-chromium": "^1.43.1",
                 "@types/he": "^1.2.3",
                 "@types/vscode": "^1.68.0",
@@ -5136,10 +5135,11 @@
             }
         },
         "node_modules/@aws-toolkits/telemetry": {
-            "version": "1.0.275",
-            "resolved": "https://registry.npmjs.org/@aws-toolkits/telemetry/-/telemetry-1.0.275.tgz",
-            "integrity": "sha512-wy8L1xerMwBq+p/fcMkmR5pmPbZ17hG1dPgmThAaKEj6qYJ42pxEWjsCa+VqftA4FtXj4yEtSdja+M0d6Qd4bQ==",
+            "version": "1.0.282",
+            "resolved": "https://registry.npmjs.org/@aws-toolkits/telemetry/-/telemetry-1.0.282.tgz",
+            "integrity": "sha512-MHktYmucYHvEm4Sscr93UmKr83D9pKJIvETo1bZiNtCsE0jxcNglxZwqZruy13Fks5uk523ZhaIALW22TF0Zpg==",
             "dev": true,
+            "license": "Apache-2.0",
             "dependencies": {
                 "ajv": "^6.12.6",
                 "fs-extra": "^11.1.0",
diff --git a/package.json b/package.json
index dae76a7a8c2..70f9d0f4c35 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
         "generateNonCodeFiles": "npm run generateNonCodeFiles -w packages/ --if-present"
     },
     "devDependencies": {
-        "@aws-toolkits/telemetry": "^1.0.274",
+        "@aws-toolkits/telemetry": "^1.0.282",
         "@playwright/browser-chromium": "^1.43.1",
         "@types/he": "^1.2.3",
         "@types/vscode": "^1.68.0",
@@ -71,7 +71,6 @@
     },
     "dependencies": {
         "@types/node": "^22.7.5",
-        "@aws-toolkits/telemetry": "^1.0.242",
         "vscode-nls": "^5.2.0",
         "vscode-nls-dev": "^4.0.4"
     }
diff --git a/packages/core/src/auth/sso/ssoAccessTokenProvider.ts b/packages/core/src/auth/sso/ssoAccessTokenProvider.ts
index 135cc1b605f..bf9c620c2f3 100644
--- a/packages/core/src/auth/sso/ssoAccessTokenProvider.ts
+++ b/packages/core/src/auth/sso/ssoAccessTokenProvider.ts
@@ -256,6 +256,7 @@ export abstract class SsoAccessTokenProvider {
                 awsRegion: this.profile.region,
                 ssoRegistrationExpiresAt: args?.registrationExpiresAt,
                 ssoRegistrationClientId: args?.registrationClientId,
+                sessionDuration: getSessionDuration(this.tokenCacheKey),
             })
 
             // Reset source in case there is a case where browser login was called but we forgot to set the source.
@@ -396,7 +397,7 @@ async function pollForTokenWithProgress<T extends { requestId?: string }>(
  */
 function getSessionDuration(id: string) {
     const creationDate = globals.globalState.getSsoSessionCreationDate(id)
-    return creationDate !== undefined ? Date.now() - creationDate : undefined
+    return creationDate !== undefined ? globals.clock.Date.now() - creationDate : undefined
 }
 
 /**
diff --git a/packages/core/src/test/credentials/sso/ssoAccessTokenProvider.test.ts b/packages/core/src/test/credentials/sso/ssoAccessTokenProvider.test.ts
index a307c11d667..1bde91b26d8 100644
--- a/packages/core/src/test/credentials/sso/ssoAccessTokenProvider.test.ts
+++ b/packages/core/src/test/credentials/sso/ssoAccessTokenProvider.test.ts
@@ -265,6 +265,50 @@ describe('SsoAccessTokenProvider', function () {
             assert.notDeepStrictEqual(await sut.getToken(), cachedToken)
         })
 
+        it(`emits session duration between logins of the same startUrl`, async function () {
+            setupFlow()
+            stubOpen()
+
+            await sut.createToken()
+            clock.tick(5000)
+            await sut.createToken()
+            clock.tick(10_000)
+            await sut.createToken()
+
+            // Mimic when we sign out then in again with the same region+startUrl. The ID is the only thing different.
+            sut = SsoAccessTokenProvider.create(
+                { region, startUrl, identifier: 'bbb' },
+                cache,
+                oidcClient,
+                reAuthState,
+                () => true
+            )
+            await sut.createToken()
+
+            assertTelemetry('aws_loginWithBrowser', [
+                {
+                    credentialStartUrl: startUrl,
+                    awsRegion: region,
+                    sessionDuration: undefined, // A new login.
+                },
+                {
+                    credentialStartUrl: startUrl,
+                    awsRegion: region,
+                    sessionDuration: 5000, // A reauth. 5000 - 0, is the diff between this and previous login
+                },
+                {
+                    credentialStartUrl: startUrl,
+                    awsRegion: region,
+                    sessionDuration: 10000, // A reauth. 15_000 - 5000 is the diff between this and previous login
+                },
+                {
+                    credentialStartUrl: startUrl,
+                    awsRegion: region,
+                    sessionDuration: undefined, // A new login, since we signed out of the last.
+                },
+            ])
+        })
+
         it('respects the device authorization expiration time', async function () {
             // XXX: Don't know how to fix this "unhandled rejection" caused by this test:
             //      rejected promise not handled within 1 second: Error: Timed-out waiting for browser login flow to complete