diff --git a/cmd/picoclaw/main.go b/cmd/picoclaw/main.go
index 07bddf875..35737572c 100644
--- a/cmd/picoclaw/main.go
+++ b/cmd/picoclaw/main.go
@@ -931,7 +931,7 @@ func authLoginGoogleAntigravity() {
 			appCfg.Agents.Defaults.Provider = "antigravity"
 		}
 		if appCfg.Agents.Defaults.Provider == "antigravity" || appCfg.Agents.Defaults.Provider == "google-antigravity" {
-			appCfg.Agents.Defaults.Model = "gemini-3-flash"
+			appCfg.Agents.Defaults.Model = "gemini-3-flash-preview"
 		}
 		if err := config.SaveConfig(getConfigPath(), appCfg); err != nil {
 			fmt.Printf("Warning: could not update config: %v\n", err)
@@ -939,7 +939,7 @@ func authLoginGoogleAntigravity() {
 	}
 
 	fmt.Println("\n✓ Google Antigravity login successful!")
-	fmt.Println("Config updated: provider=antigravity, model=gemini-3-flash")
+	fmt.Println("Config updated: provider=antigravity, model=gemini-3-flash-preview")
 	fmt.Println("Try it: picoclaw agent -m \"Hello world\"")
 }
 
diff --git a/pkg/providers/antigravity_provider.go b/pkg/providers/antigravity_provider.go
index 694cc2cdb..128d8cfc4 100644
--- a/pkg/providers/antigravity_provider.go
+++ b/pkg/providers/antigravity_provider.go
@@ -18,7 +18,7 @@ import (
 
 const (
 	antigravityBaseURL      = "https://cloudcode-pa.googleapis.com"
-	antigravityDefaultModel = "gemini-3-flash"
+	antigravityDefaultModel = "gemini-3-flash-preview"
 	antigravityUserAgent    = "antigravity"
 	antigravityXGoogClient  = "google-cloud-sdk vscode_cloudshelleditor/0.1"
 	antigravityVersion      = "1.15.8"