diff --git a/packages/core/src/plugin/variant.ts b/packages/core/src/plugin/variant.ts
index 05e1653b6e53..e608c29af167 100644
--- a/packages/core/src/plugin/variant.ts
+++ b/packages/core/src/plugin/variant.ts
@@ -30,8 +30,15 @@ export const Plugin = define({
 export function generate(model: ModelV2Info): ModelV2Info["variants"] {
   if (model.api.type !== "aisdk" || model.api.package !== "@ai-sdk/openai-compatible") return []
   const ids = `${model.id} ${model.api.id}`.toLowerCase()
-  if (!["glm-5.2", "glm-5-2", "glm-5p2"].some((name) => ids.includes(name))) return []
-  return ["high", "max"].map((id) => ({
+  
+  const isGLM = ["glm-5.2", "glm-5-2", "glm-5p2"].some((name) => ids.includes(name))
+  const isHy3 = ["hy3"].some((name) => ids.includes(name))
+  
+  if (!isGLM && !isHy3) return []
+
+  const efforts = isHy3 ? ["low", "medium", "high"] : ["high", "max"]
+
+  return efforts.map((id) => ({
     id,
     headers: {},
     body: { reasoning_effort: id },
diff --git a/packages/core/test/plugin/variant.test.ts b/packages/core/test/plugin/variant.test.ts
index 84af04a4df98..d01bbc064b02 100644
--- a/packages/core/test/plugin/variant.test.ts
+++ b/packages/core/test/plugin/variant.test.ts
@@ -64,4 +64,29 @@ describe("VariantPlugin", () => {
       ])
     }),
   )
+
+  it.effect("adds Hy3 variants after catalog sources", () =>
+    Effect.gen(function* () {
+      const service = yield* Catalog.Service
+      yield* service.transform((catalog) => {
+        catalog.provider.update(ProviderV2.ID.opencode, (provider) => {
+          provider.api = { type: "aisdk", package: "@ai-sdk/openai-compatible" }
+        })
+        catalog.model.update(ProviderV2.ID.opencode, ModelV2.ID.make("hy3"), (model) => {
+          model.api = {
+            id: ModelV2.ID.make("hy3"),
+            type: "aisdk",
+            package: "@ai-sdk/openai-compatible",
+          }
+        })
+      })
+      yield* VariantPlugin.Plugin.effect(host({ catalog: catalogHost(service) }))
+
+      expect((yield* service.model.get(ProviderV2.ID.opencode, ModelV2.ID.make("hy3")))?.variants).toEqual([
+        expect.objectContaining({ id: "low", body: { reasoning_effort: "low" } }),
+        expect.objectContaining({ id: "medium", body: { reasoning_effort: "medium" } }),
+        expect.objectContaining({ id: "high", body: { reasoning_effort: "high" } }),
+      ])
+    }),
+  )
 })