diff --git a/open-sse/executors/antigravity.js b/open-sse/executors/antigravity.js
index 3ab8abfe..2387a523 100644
--- a/open-sse/executors/antigravity.js
+++ b/open-sse/executors/antigravity.js
@@ -18,8 +18,16 @@ function sanitizeFunctionName(name) {
 const MAX_RETRY_AFTER_MS = 10000;
 const MAX_ANTIGRAVITY_OUTPUT_TOKENS = 16384;
 
-// Fields Google generateContent rejects (e.g. Claude adaptive output_config) — stripped from antigravity request envelope
-const ANTIGRAVITY_REQUEST_BLACKLIST = ["output_config"];
+// Fields Google generateContent rejects (Claude/OpenAI/Qwen thinking fields set at body root by thinkingUnified.js)
+const ANTIGRAVITY_REQUEST_BLACKLIST = [
+  "output_config",
+  "thinking",
+  "reasoning_effort",
+  "reasoning",
+  "enable_thinking",
+  "thinking_budget",
+  "thinkingConfig",
+];
 
 export class AntigravityExecutor extends BaseExecutor {
   constructor() {