diff --git a/packages/opencode/src/plugin/github-copilot/models.ts b/packages/opencode/src/plugin/github-copilot/models.ts
index 7f666b0cfbc..286e7dc59e0 100644
--- a/packages/opencode/src/plugin/github-copilot/models.ts
+++ b/packages/opencode/src/plugin/github-copilot/models.ts
@@ -126,7 +126,7 @@ function build(key: string, remote: Item, url: string, prev?: Model): Model {
           thinking: {
             type: "adaptive",
             // kilocode_change start - treat opus-4.8 like opus-4.7
-            ...(["opus-4-7", "opus-4.7", "opus-4-8", "opus-4.8"].some((v) => model.api.id.includes(v))
+            ...(model.api.id.includes("opus-4.7") || model.api.id.includes("opus-4.8")
               ? { display: "summarized" }
               : {}),
             // kilocode_change end
diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 640aadbb157..e6f157c18e8 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -783,7 +783,7 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
         let efforts = [...adaptiveEfforts]
         if (model.providerID === "github-copilot") {
           // kilocode_change start - treat opus-4.8 like opus-4.7
-          if (["opus-4-7", "opus-4.7", "opus-4-8", "opus-4.8"].some((v) => model.api.id.includes(v))) {
+          if (model.api.id.includes("opus-4.7") || model.api.id.includes("opus-4.8")) {
             efforts = ["medium"]
           }
           // kilocode_change end