diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 88489a5607..76c355647e 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -288,7 +288,7 @@ export namespace ProviderTransform {
         result["reasoningEffort"] = "medium"
       }
 
-      if (model.api.id.endsWith("gpt-5.1") && model.providerID !== "azure") {
+      if (model.api.id.endsWith("gpt-5.") && model.providerID !== "azure") {
         result["textVerbosity"] = "low"
       }