diff --git a/crates/forge_repo/src/provider/provider.json b/crates/forge_repo/src/provider/provider.json
index e98b802b..f34049e8 100644
--- a/crates/forge_repo/src/provider/provider.json
+++ b/crates/forge_repo/src/provider/provider.json
@@ -2602,7 +2602,7 @@
         "id": "gpt-5.5",
         "name": "GPT-5.5",
         "description": "Latest frontier model for complex professional work",
-        "context_length": 1000000,
+        "context_length": 400000,
         "tools_supported": true,
         "supports_parallel_tool_calls": true,
         "supports_reasoning": true,