diff --git a/packages/opencode/src/session/system.ts b/packages/opencode/src/session/system.ts
index 06c71fa7dbdd..e0d7203a05c6 100644
--- a/packages/opencode/src/session/system.ts
+++ b/packages/opencode/src/session/system.ts
@@ -28,7 +28,7 @@ export function provider(model: Provider.Model) {
   if (model.api.id.includes("gemini-")) return [PROMPT_GEMINI]
   if (model.api.id.includes("claude")) return [PROMPT_ANTHROPIC]
   if (model.api.id.toLowerCase().includes("trinity")) return [PROMPT_TRINITY]
-  if (model.api.id.toLowerCase().includes("kimi")) return [PROMPT_KIMI]
+  if (model.api.id.toLowerCase().includes("kimi") || model.api.id.toLowerCase().includes("k2p5") || model.api.id.toLowerCase().includes("k2p6")) return [PROMPT_ANTHROPIC]
   return [PROMPT_DEFAULT]
 }