diff --git a/cmd/launch/codex_app.go b/cmd/launch/codex_app.go
index 0f37bb0840..e711203e4a 100644
--- a/cmd/launch/codex_app.go
+++ b/cmd/launch/codex_app.go
@@ -31,6 +31,7 @@ const (
 	codexAppIntegrationName        = "codex-app"
 	codexAppProfileName            = "ollama-launch-codex-app"
 	codexAppBundleID               = "com.openai.codex"
+	codexAppLaunchURL              = "codex://threads/new?mode=codex"
 	codexAppModelCatalogFilename   = proxy.CodexDesktopModelCatalogFilename
 	codexAppRoutingCatalogFilename = proxy.CodexDesktopRoutingCatalogFilename
 	codexAppAutoReviewModelEnv     = "OLLAMA_CODEX_AUTO_REVIEW_MODEL"
@@ -2078,13 +2079,7 @@ func defaultCodexAppOpenApp(args []string) error {
 		}
 		return fmt.Errorf("ChatGPT was not found; install it from https://chatgpt.com/download, then re-run 'ollama launch chatgpt'")
 	case "darwin":
-		if path := codexAppAppPath(); path != "" {
-			cmd := exec.Command("open", path)
-			cmd.Stdout = os.Stdout
-			cmd.Stderr = os.Stderr
-			return cmd.Run()
-		}
-		cmd := exec.Command("open", "-b", codexAppBundleID)
+		cmd := exec.Command("open", codexAppDarwinOpenArgs(codexAppAppPath())...)
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
 		return cmd.Run()
@@ -2093,12 +2088,26 @@ func defaultCodexAppOpenApp(args []string) error {
 	}
 }
 
+func codexAppDarwinOpenArgs(path string) []string {
+	args := []string{"-b", codexAppBundleID}
+	if path != "" {
+		args = []string{path}
+	}
+	if (&CodexApp{}).OllamaConfigured() {
+		if path != "" {
+			args = []string{"-a", path}
+		}
+		args = append(args, codexAppLaunchURL)
+	}
+	return args
+}
+
 func defaultCodexAppOpenAppPath(path string) error {
 	switch codexAppGOOS {
 	case "windows":
 		return exec.Command("powershell.exe", "-NoProfile", "-Command", "Start-Process -FilePath "+quotePowerShellString(path)).Run()
 	case "darwin":
-		cmd := exec.Command("open", path)
+		cmd := exec.Command("open", codexAppDarwinOpenArgs(path)...)
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
 		return cmd.Run()
diff --git a/cmd/launch/codex_app_test.go b/cmd/launch/codex_app_test.go
index 93e882c634..70636b9811 100644
--- a/cmd/launch/codex_app_test.go
+++ b/cmd/launch/codex_app_test.go
@@ -3055,6 +3055,81 @@ func TestCodexAppRestoreDoesNotTreatCLIProfileAsOwned(t *testing.T) {
 	}
 }
 
+func TestCodexAppDarwinOpenArgs(t *testing.T) {
+	for _, path := range []string{"", "/Applications/ChatGPT.app", "/Users/test/Apps/ChatGPT Preview.app"} {
+		t.Run(path, func(t *testing.T) {
+			setTestHome(t, t.TempDir())
+			withCodexAppPlatform(t, "darwin")
+			t.Setenv("OLLAMA_HOST", "http://127.0.0.1:11434")
+
+			usualArgs := []string{"-b", codexAppBundleID}
+			ollamaArgs := []string{"-b", codexAppBundleID, "codex://threads/new?mode=codex"}
+			if path != "" {
+				usualArgs = []string{path}
+				ollamaArgs = []string{"-a", path, "codex://threads/new?mode=codex"}
+			}
+			if got := codexAppDarwinOpenArgs(path); !slices.Equal(got, usualArgs) {
+				t.Fatalf("unconfigured open args = %q, want %q", got, usualArgs)
+			}
+
+			app := &CodexApp{}
+			if err := app.ConfigureWithModels("qwen3:8b", testLaunchModels("qwen3:8b")); err != nil {
+				t.Fatal(err)
+			}
+			if got := codexAppDarwinOpenArgs(path); !slices.Equal(got, ollamaArgs) {
+				t.Fatalf("Ollama open args = %q, want %q", got, ollamaArgs)
+			}
+
+			if err := restoreCodexAppProfile(); err != nil {
+				t.Fatal(err)
+			}
+			if got := codexAppDarwinOpenArgs(path); !slices.Equal(got, usualArgs) {
+				t.Fatalf("restored open args = %q, want %q", got, usualArgs)
+			}
+		})
+	}
+}
+
+func TestCodexAppDesktopLaunchMode(t *testing.T) {
+	setTestHome(t, t.TempDir())
+	withCodexAppPlatform(t, "darwin")
+	withCodexAppRouterHealth(t, func() error { return nil })
+	t.Setenv("OLLAMA_HOST", "http://127.0.0.1:11434")
+
+	running := false
+	var openedArgs [][]string
+	withCodexAppProcessHooks(t,
+		func() bool { return running },
+		func() error { running = false; return nil },
+		func() error {
+			openedArgs = append(openedArgs, codexAppDarwinOpenArgs("/Applications/ChatGPT.app"))
+			running = true
+			return nil
+		},
+	)
+	codexAppCanOpenID = func() bool { return true }
+
+	app := &CodexApp{}
+	if err := app.UseOllamaFromDesktop("qwen3:8b", testLaunchModels("qwen3:8b"), false); err != nil {
+		t.Fatal(err)
+	}
+	if err := app.RestartFromDesktop(true); err != nil {
+		t.Fatal(err)
+	}
+	if err := app.RestoreFromDesktop(true); err != nil {
+		t.Fatal(err)
+	}
+
+	want := [][]string{
+		{"-a", "/Applications/ChatGPT.app", "codex://threads/new?mode=codex"},
+		{"-a", "/Applications/ChatGPT.app", "codex://threads/new?mode=codex"},
+		{"/Applications/ChatGPT.app"},
+	}
+	if !slices.EqualFunc(openedArgs, want, slices.Equal[[]string]) {
+		t.Fatalf("open args = %q, want first launch and restart in Codex, then a normal launch on restore: %q", openedArgs, want)
+	}
+}
+
 func TestCodexAppRunRestartsRunningAppWhenConfirmed(t *testing.T) {
 	withCodexAppPlatform(t, "darwin")
 	restoreConfirm := withLaunchConfirmPolicy(launchConfirmPolicy{yes: true})