diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index a911b866..7c40955d 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -95,7 +95,14 @@ export namespace Provider {
 
           switch (regionPrefix) {
             case "us": {
-              const modelRequiresPrefix = ["claude", "deepseek"].some((m) => modelID.includes(m))
+              const modelRequiresPrefix = [
+                "nova-micro",
+                "nova-lite",
+                "nova-pro",
+                "nova-premier",
+                "claude",
+                "deepseek"
+              ].some((m) => modelID.includes(m))
               const isGovCloud = region.startsWith("us-gov")
               if (modelRequiresPrefix && !isGovCloud) {
                 modelID = `${regionPrefix}.${modelID}`