diff --git a/docs/model-api-mapping.json b/docs/model-api-mapping.json
index 1d5c9f6a9..313b6c385 100644
--- a/docs/model-api-mapping.json
+++ b/docs/model-api-mapping.json
@@ -1,7 +1,7 @@
 {
   "title": "Model-to-API Endpoint Mapping",
   "description": "Maps AI model families to their supported API endpoints. Used to determine which endpoint (chat/completions vs responses vs messages) a model requires.",
-  "lastUpdated": "2026-07-17T06:00:00Z",
+  "lastUpdated": "2026-07-22T06:07:25Z",
   "sources": {
     "openai": "https://platform.openai.com/docs/models",
     "anthropic": "https://docs.anthropic.com/en/docs/about-claude/models"
@@ -28,8 +28,8 @@
         {
           "family": "gpt-5.5",
           "patterns": ["gpt-5.5*"],
-          "endpoints": ["responses"],
-          "notes": "Responses API only. Not present in OpenAI OpenAPI spec v2.3.0; reserved for future gpt-5.5 family models."
+          "endpoints": ["chat_completions", "responses"],
+          "notes": "Supports both endpoints. Listed on the official GPT-5.5 model page."
         },
         {
           "family": "gpt-5.4",