diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index 841fd97f08..c05d053193 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -1358,7 +1358,9 @@ const layer: Layer.Layer<
             )
               delete provider.models[modelID]
 
-            model.variants = mapValues(ProviderTransform.variants(model), (v) => v)
+            if (!model.variants || Object.keys(model.variants).length === 0) {
+              model.variants = mapValues(ProviderTransform.variants(model), (v) => v)
+            }
 
             const configVariants = configProvider?.models?.[modelID]?.variants
             if (configVariants && model.variants) {