diff --git a/packages/sdk/README.md b/packages/sdk/README.md
index feffdf4..c96cee6 100644
--- a/packages/sdk/README.md
+++ b/packages/sdk/README.md
@@ -62,6 +62,16 @@ realtimeClient.setPrompt("Cyberpunk city");
 realtimeClient.disconnect();
 ```
 
+#### Portrait mode
+
+Pass `{ orientation: "portrait" }` to swap width and height for vertical streams:
+
+```typescript
+const model = models.realtime("lucy_2_rt", { orientation: "portrait" });
+// model.width  → 720
+// model.height → 1280
+```
+
 ### Async Processing (Queue API)
 
 For video generation jobs, use the queue API to submit jobs and poll for results:
diff --git a/packages/sdk/src/index.ts b/packages/sdk/src/index.ts
index caddfa2..3aef58b 100644
--- a/packages/sdk/src/index.ts
+++ b/packages/sdk/src/index.ts
@@ -56,6 +56,7 @@ export {
   type Model,
   type ModelDefinition,
   models,
+  type RealtimeModelOptions,
   type RealTimeModels,
   type VideoModelDefinition,
   type VideoModels,
diff --git a/packages/sdk/src/shared/model.ts b/packages/sdk/src/shared/model.ts
index d2f6d4b..d6d0152 100644
--- a/packages/sdk/src/shared/model.ts
+++ b/packages/sdk/src/shared/model.ts
@@ -378,12 +378,41 @@ const _models = {
   },
 } as const;
 
+/**
+ * Options for configuring realtime model output.
+ */
+export type RealtimeModelOptions = {
+  /** The orientation of the output. When `"portrait"`, width and height are swapped. Defaults to `"landscape"`. */
+  orientation?: "landscape" | "portrait";
+};
+
 export const models = {
-  realtime: <T extends RealTimeModels>(model: T): ModelDefinition<T> => {
+  /**
+   * Get a realtime model definition.
+   *
+   * Available models:
+   *   - `"mirage"` - Mirage v1
+   *   - `"mirage_v2"` - Mirage v2
+   *   - `"lucy_v2v_720p_rt"` - Lucy v2v 720p realtime
+   *   - `"lucy_2_rt"` - Lucy 2 realtime
+   *   - `"live_avatar"` - Live avatar
+   *
+   * @param model - The realtime model to use.
+   * @param options - Optional configuration. Set `orientation` to `"portrait"` to swap width and height.
+   * @returns The model definition, with dimensions adjusted for the requested orientation.
+   */
+  realtime: <T extends RealTimeModels>(model: T, options?: RealtimeModelOptions): ModelDefinition<T> => {
     const modelDefinition = _models.realtime[model];
     if (!modelDefinition) {
       throw createModelNotFoundError(model);
     }
+    if (options?.orientation === "portrait") {
+      return {
+        ...modelDefinition,
+        width: modelDefinition.height,
+        height: modelDefinition.width,
+      } as ModelDefinition<T>;
+    }
     return modelDefinition as ModelDefinition<T>;
   },
   /**
diff --git a/packages/sdk/tests/unit.test.ts b/packages/sdk/tests/unit.test.ts
index 627303e..866e6f0 100644
--- a/packages/sdk/tests/unit.test.ts
+++ b/packages/sdk/tests/unit.test.ts
@@ -990,6 +990,45 @@ describe("Lucy 2 realtime", () => {
   });
 });
 
+describe("models.realtime", () => {
+  it("returns correct landscape dimensions by default", () => {
+    const model = models.realtime("lucy_2_rt");
+    expect(model.width).toBe(1280);
+    expect(model.height).toBe(720);
+    expect(model.fps).toBe(20);
+  });
+
+  it("returns correct landscape dimensions when explicitly set", () => {
+    const model = models.realtime("lucy_2_rt", { orientation: "landscape" });
+    expect(model.width).toBe(1280);
+    expect(model.height).toBe(720);
+    expect(model.fps).toBe(20);
+  });
+
+  it("returns swapped dimensions in portrait mode", () => {
+    const model = models.realtime("lucy_2_rt", { orientation: "portrait" });
+    expect(model.width).toBe(720);
+    expect(model.height).toBe(1280);
+    expect(model.fps).toBe(20);
+  });
+
+  it("portrait mode preserves model name and urlPath", () => {
+    const model = models.realtime("lucy_2_rt", { orientation: "portrait" });
+    expect(model.name).toBe("lucy_2_rt");
+    expect(model.urlPath).toBe("/v1/stream");
+  });
+
+  it("throws on unknown model", () => {
+    expect(() => models.realtime("nonexistent_model" as any)).toThrow();
+  });
+
+  it("swaps dimensions for mirage in portrait mode", () => {
+    const model = models.realtime("mirage", { orientation: "portrait" });
+    expect(model.width).toBe(704);
+    expect(model.height).toBe(1280);
+  });
+});
+
 describe("WebRTCConnection", () => {
   describe("setImageBase64", () => {
     it("rejects immediately when WebSocket is not open", async () => {