diff --git a/internal/registry/models/models.json b/internal/registry/models/models.json
index acf368ab5f..95c00c0cdb 100644
--- a/internal/registry/models/models.json
+++ b/internal/registry/models/models.json
@@ -2760,6 +2760,72 @@
         ]
       }
     },
+    {
+      "id": "gemini-3-flash-agent",
+      "object": "model",
+      "owned_by": "antigravity",
+      "type": "antigravity",
+      "display_name": "Gemini 3 Flash Agent",
+      "name": "gemini-3-flash-agent",
+      "description": "Gemini 3 Flash Agent",
+      "context_length": 1048576,
+      "max_completion_tokens": 65536,
+      "thinking": {
+        "min": 128,
+        "max": 32768,
+        "dynamic_allowed": true,
+        "levels": [
+          "minimal",
+          "low",
+          "medium",
+          "high"
+        ]
+      }
+    },
+    {
+      "id": "gemini-3-flash-lite",
+      "object": "model",
+      "owned_by": "antigravity",
+      "type": "antigravity",
+      "display_name": "Gemini 3 Flash Lite",
+      "name": "gemini-3-flash-lite",
+      "description": "Gemini 3 Flash Lite",
+      "context_length": 1048576,
+      "max_completion_tokens": 65536,
+      "thinking": {
+        "min": 128,
+        "max": 32768,
+        "dynamic_allowed": true,
+        "levels": [
+          "minimal",
+          "low",
+          "medium",
+          "high"
+        ]
+      }
+    },
+    {
+      "id": "gemini-3.1-flash-lite",
+      "object": "model",
+      "owned_by": "antigravity",
+      "type": "antigravity",
+      "display_name": "Gemini 3.1 Flash Lite",
+      "name": "gemini-3.1-flash-lite",
+      "description": "Gemini 3.1 Flash Lite",
+      "context_length": 1048576,
+      "max_completion_tokens": 65536,
+      "thinking": {
+        "min": 128,
+        "max": 32768,
+        "dynamic_allowed": true,
+        "levels": [
+          "minimal",
+          "low",
+          "medium",
+          "high"
+        ]
+      }
+    },
     {
       "id": "gpt-oss-120b-medium",
       "object": "model",