diff --git a/packages/opencode/src/plugin/github-copilot/models.ts b/packages/opencode/src/plugin/github-copilot/models.ts
index e2524288b72..7f666b0cfbc 100644
--- a/packages/opencode/src/plugin/github-copilot/models.ts
+++ b/packages/opencode/src/plugin/github-copilot/models.ts
@@ -125,9 +125,11 @@ function build(key: string, remote: Item, url: string, prev?: Model): Model {
         variants[effort] = {
           thinking: {
             type: "adaptive",
-            ...(model.api.id.includes("opus-4.7") || model.api.id.includes("opus-4.8")
+            // 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))
               ? { display: "summarized" }
-              : {}), // kilocode_change - treat opus-4.8 like opus-4.7
+              : {}),
+            // kilocode_change end
           },
           effort,
         }
diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index c90ad794087..640aadbb157 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -542,10 +542,11 @@ function openaiReasoningEfforts(apiId: string, releaseDate: string): string[] |
 }
 
 function anthropicAdaptiveEfforts(apiId: string): string[] | null {
+  // 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) => apiId.includes(v))) {
-    // kilocode_change - treat opus-4.8 like opus-4.7
     return ["low", "medium", "high", "xhigh", "max"]
   }
+  // kilocode_change end
   if (["opus-4-6", "opus-4.6", "sonnet-4-6", "sonnet-4.6"].some((v) => apiId.includes(v))) {
     return ["low", "medium", "high", "max"]
   }
@@ -781,10 +782,11 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
       if (adaptiveEfforts) {
         let efforts = [...adaptiveEfforts]
         if (model.providerID === "github-copilot") {
-          if (model.api.id.includes("opus-4.7") || model.api.id.includes("opus-4.8")) {
-            // kilocode_change - treat opus-4.8 like opus-4.7
+          // 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))) {
             efforts = ["medium"]
           }
+          // kilocode_change end
           // Efforts currently supported are: low, medium, high
           efforts = efforts.filter((v) => v !== "max" && v !== "xhigh")
         }
@@ -794,10 +796,11 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
             {
               thinking: {
                 type: "adaptive",
-                // kilocode_change - treat opus-4.8 like opus-4.7
+                // 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))
                   ? { display: "summarized" }
                   : {}),
+                // kilocode_change end
               },
               effort,
             },
@@ -830,10 +833,11 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
               reasoningConfig: {
                 type: "adaptive",
                 maxReasoningEffort: effort,
-                // kilocode_change - treat opus-4.8 like opus-4.7
+                // 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))
                   ? { display: "summarized" }
                   : {}),
+                // kilocode_change end
               },
             },
           ]),
diff --git a/packages/opencode/test/kilocode/transform-opus-4.7.test.ts b/packages/opencode/test/kilocode/transform-opus-4.7.test.ts
index 59584a44a1a..af26d4163f8 100644
--- a/packages/opencode/test/kilocode/transform-opus-4.7.test.ts
+++ b/packages/opencode/test/kilocode/transform-opus-4.7.test.ts
@@ -30,7 +30,7 @@ function mockModel(overrides: Partial<any> = {}): any {
   }
 }
 
-describe("ProviderTransform.variants - Claude Opus 4.7", () => {
+describe("ProviderTransform.variants - Claude Opus 4.7 / 4.8", () => {
   test("opus-4-7 returns adaptive thinking variants including xhigh (native anthropic)", () => {
     const model = mockModel({
       api: {