diff --git a/providers/openai/responses_options.go b/providers/openai/responses_options.go
index a80a5d3103f988649727702369748277560aff85..42cdf984cb7e7bea53c112157569e95c8bce1096 100644
--- a/providers/openai/responses_options.go
+++ b/providers/openai/responses_options.go
@@ -219,6 +219,8 @@ var responsesReasoningModelIDs = []string{
 	"gpt-5.4-mini",
 	"gpt-5.4-nano",
 	"gpt-5.4-codex",
+	"gpt-5.5",
+	"gpt-5.5-pro",
 	"gpt-oss-120b",
 }