diff --git a/packages/hub-client/src/credential-test.ts b/packages/hub-client/src/credential-test.ts
index 8dd9f483..25dfb298 100644
--- a/packages/hub-client/src/credential-test.ts
+++ b/packages/hub-client/src/credential-test.ts
@@ -618,6 +618,20 @@ export async function fetchOllamaModelCapabilities(
  * to fall back to a heuristic (name-sorting, a curated allowlist) to
  * tell a chat model from an embedding one (CL-6351/CL-6366).
  */
+/**
+ * Ollama's `-cloud` suffix names a model that this instance merely proxies
+ * to ollama.com — it answers `/api/tags` whether or not the box is signed
+ * in, but every actual inference call needs an ollama.com account and its
+ * own credential, which this catalog has no way to supply. Seeding one
+ * puts a keyed cloud upstream into what is otherwise an unauthenticated
+ * local chain (CL-6645). Excluded here rather than filtered by capability
+ * because a signed-in box's `-cloud` model still reports full
+ * capabilities — the suffix, not the capability probe, is what marks it.
+ */
+function isCloudProxyModel(modelName: string): boolean {
+  return modelName.endsWith("-cloud") || modelName.endsWith(":cloud");
+}
+
 export async function fetchOllamaModelCatalog(
   baseURL: string,
   fetchImpl: FetchLike = fetch as unknown as FetchLike,
@@ -634,8 +648,12 @@ export async function fetchOllamaModelCatalog(
     if (parsed instanceof type.errors || parsed.models.length === 0) {
       return undefined;
     }
+    const localModels = parsed.models.filter(
+      (model) => !isCloudProxyModel(model.name),
+    );
+    if (localModels.length === 0) return undefined;
     return await Promise.all(
-      parsed.models.map(async (model) => ({
+      localModels.map(async (model) => ({
         canonicalName: model.name,
         displayName: model.name,
         capabilities: await fetchOllamaModelCapabilities(
diff --git a/packages/hub-client/test/credential-test.test.ts b/packages/hub-client/test/credential-test.test.ts
index 5b90dac6..0edfe07e 100644
--- a/packages/hub-client/test/credential-test.test.ts
+++ b/packages/hub-client/test/credential-test.test.ts
@@ -539,6 +539,51 @@ describe("fetchOllamaModelCatalog", () => {
     ]);
   });
 
+  test("excludes ollama.com cloud-proxy models (a signed-out box can never serve them)", async () => {
+    const fetchImpl: FetchLike = async (url) => {
+      if (url.toString().endsWith("/api/tags")) {
+        return new Response(
+          JSON.stringify({
+            models: [
+              { name: "gpt-oss:20b" },
+              { name: "qwen3-coder:480b-cloud" },
+              { name: "minimax-m2:cloud" },
+            ],
+          }),
+          { status: 200 },
+        );
+      }
+      return new Response(JSON.stringify({ capabilities: ["completion"] }), {
+        status: 200,
+      });
+    };
+
+    const models = await fetchOllamaModelCatalog(
+      "http://localhost:11434",
+      fetchImpl,
+    );
+    expect(models?.map((model) => model.canonicalName)).toEqual([
+      "gpt-oss:20b",
+    ]);
+  });
+
+  test("returns undefined when every model is a cloud-proxy model", async () => {
+    const fetchImpl: FetchLike = async (url) => {
+      if (url.toString().endsWith("/api/tags")) {
+        return new Response(
+          JSON.stringify({ models: [{ name: "minimax-m2:cloud" }] }),
+          { status: 200 },
+        );
+      }
+      return new Response(JSON.stringify({ capabilities: ["completion"] }), {
+        status: 200,
+      });
+    };
+    expect(
+      await fetchOllamaModelCatalog("http://localhost:11434", fetchImpl),
+    ).toBeUndefined();
+  });
+
   test("returns undefined when the instance is unreachable", async () => {
     const fetchImpl: FetchLike = async () => {
       throw new Error("ECONNREFUSED");