diff --git a/packages/ai/src/providers/google-gemini-cli.ts b/packages/ai/src/providers/google-gemini-cli.ts
index fa6f98f1..daaa711b 100644
--- a/packages/ai/src/providers/google-gemini-cli.ts
+++ b/packages/ai/src/providers/google-gemini-cli.ts
@@ -78,7 +78,7 @@ const GEMINI_CLI_HEADERS = {
 };
 
 // Headers for Antigravity (sandbox endpoint) - requires specific User-Agent
-const DEFAULT_ANTIGRAVITY_VERSION = "1.21.9";
+const DEFAULT_ANTIGRAVITY_VERSION = "1.107.0";
 
 function getAntigravityHeaders() {
 	const version = process.env.PI_AI_ANTIGRAVITY_VERSION || DEFAULT_ANTIGRAVITY_VERSION;