diff --git a/internal/registry/models/models.json b/internal/registry/models/models.json
index 4ca36db6e..b7b406a00 100644
--- a/internal/registry/models/models.json
+++ b/internal/registry/models/models.json
@@ -3979,13 +3979,13 @@
   ],
   "antigravity": [
     {
-      "id": "claude-opus-4-6-thinking",
+      "id": "claude-opus-5-5-thinking",
       "object": "model",
       "owned_by": "antigravity",
       "type": "antigravity",
-      "display_name": "Claude Opus 4.6 (Thinking)",
-      "name": "claude-opus-4-6-thinking",
-      "description": "Claude Opus 4.6 (Thinking)",
+      "display_name": "Claude Opus 5.5 (Thinking)",
+      "name": "claude-opus-5-5-thinking",
+      "description": "Claude Opus 5.5 (Thinking)",
       "context_length": 200000,
       "max_completion_tokens": 64000,
       "thinking": {
@@ -4003,13 +4003,13 @@
       ]
     },
     {
-      "id": "claude-sonnet-4-6",
+      "id": "claude-sonnet-5-5",
       "object": "model",
       "owned_by": "antigravity",
       "type": "antigravity",
-      "display_name": "Claude Sonnet 4.6 (Thinking)",
-      "name": "claude-sonnet-4-6",
-      "description": "Claude Sonnet 4.6 (Thinking)",
+      "display_name": "Claude Sonnet 5.5 (Thinking)",
+      "name": "claude-sonnet-5-5",
+      "description": "Claude Sonnet 5.5 (Thinking)",
       "context_length": 200000,
       "max_completion_tokens": 64000,
       "thinking": {