diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 0fddabb66bb..35ea19b5f69 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -985,24 +985,27 @@ export function options(input: {
   }
 
   if (input.model.api.id.includes("gpt-5") && !input.model.api.id.includes("gpt-5-chat")) {
-    // kilocode_change start - guard OpenAI Responses-only params for compatible providers
-    const nativeOpenAI = [
-      "@ai-sdk/openai",
-      "@ai-sdk/azure",
-      "@ai-sdk/github-copilot",
-      "@openrouter/ai-sdk-provider",
-      "@kilocode/kilo-gateway",
-    ].includes(input.model.api.npm)
-
     if (!input.model.api.id.includes("gpt-5-pro")) {
       result["reasoningEffort"] = "medium"
-      if (nativeOpenAI) {
+      if (
+        input.model.api.npm === "@ai-sdk/openai" ||
+        input.model.api.npm === "@ai-sdk/azure" ||
+        input.model.api.npm === "@ai-sdk/github-copilot" || // kilocode_change
+        input.model.api.npm === "@openrouter/ai-sdk-provider" || // kilocode_change
+        input.model.api.npm === "@kilocode/kilo-gateway" // kilocode_change
+      ) {
         result["reasoningSummary"] = "auto"
       }
     }
 
     if (
-      nativeOpenAI &&
+      // kilocode_change start - gate textVerbosity to Responses-API providers
+      (input.model.api.npm === "@ai-sdk/openai" ||
+        input.model.api.npm === "@ai-sdk/azure" ||
+        input.model.api.npm === "@ai-sdk/github-copilot" ||
+        input.model.api.npm === "@openrouter/ai-sdk-provider" ||
+        input.model.api.npm === "@kilocode/kilo-gateway") &&
+      // kilocode_change end
       input.model.api.id.includes("gpt-5.") &&
       !input.model.api.id.includes("codex") &&
       !input.model.api.id.includes("-chat") &&
@@ -1010,7 +1013,6 @@ export function options(input: {
     ) {
       result["textVerbosity"] = "low"
     }
-    // kilocode_change end
 
     if (input.model.providerID.startsWith("opencode")) {
       result["promptCacheKey"] = input.sessionID