feat(livekit): upgrade Gemini starter

examples/livekit-gemini-hacker-starter/agent/.env.example

@@ -2,3 +2,6 @@ LIVEKIT_API_KEY=<your API Key>
 LIVEKIT_API_SECRET=<your API Secret>
 LIVEKIT_URL=<your LiveKit server URL>
 GOOGLE_API_KEY=<your Google/Gemini API key>
+GEMINI_REALTIME_MODEL=gemini-3.1-flash-live-preview
+GEMINI_IMAGE_MODEL=gemini-3.1-flash-image
+GEMINI_LYRIA_MODEL=models/lyria-realtime-exp

examples/livekit-gemini-hacker-starter/agent/agent.py

@@ -16,9 +16,9 @@ logger = logging.getLogger(__name__)
 # ─────────────────────────────────────────────
 # HACK HERE: swap model IDs to experiment
 # ─────────────────────────────────────────────
-REALTIME_MODEL = "gemini-2.5-flash-native-audio-preview-12-2025"
-IMAGE_MODEL = "gemini-2.5-flash-image"  # Nano Banana
-LYRIA_MODEL = "models/lyria-realtime-exp"
+REALTIME_MODEL = os.getenv("GEMINI_REALTIME_MODEL", "gemini-3.1-flash-live-preview")
+IMAGE_MODEL = os.getenv("GEMINI_IMAGE_MODEL", "gemini-3.1-flash-image")  # Nano Banana 2
+LYRIA_MODEL = os.getenv("GEMINI_LYRIA_MODEL", "models/lyria-realtime-exp")
 
 # ─────────────────────────────────────────────
 # HACK HERE: change the agent's persona
@@ -27,7 +27,7 @@ PERSONA_INSTRUCTIONS = """You are a creative multimodal AI assistant at a Google
 You can see through the user's camera, hear them speak, generate images, and play real-time music.
 
 Your capabilities:
-- generate_image: Create images with Nano Banana (Gemini 2.5 Flash Image). Use this when asked to generate, create, render, or visualize anything.
+- generate_image: Create images with Nano Banana 2 (Gemini 3.1 Flash Image). Use this when asked to generate, create, render, or visualize anything.
 - start_music: Play real-time generative music with Lyria RealTime. Use this for soundtracks, ambience, or any audio atmosphere.
 - stop_music: Stop the current music.
 
@@ -52,7 +52,7 @@ When asked about visuals:
         self._music_stop_event = asyncio.Event()
         self._music_track_pub = None
 
-        # Standard client for image generation (NanoBanana 2)
+        # Standard client for image generation (Nano Banana 2)
         self._image_client = genai.Client(api_key=os.environ["GOOGLE_API_KEY"])
 
         # v1alpha client required for Lyria RealTime
@@ -70,7 +70,7 @@ When asked about visuals:
         context: RunContext,
         prompt: str,
     ) -> str:
-        """Generate an image using NanoBanana 2 and display it on the user's screen.
+        """Generate an image using Nano Banana 2 and display it on the user's screen.
 
         Call this whenever the user asks you to create, generate, render, or visualize something.
 
@@ -281,12 +281,13 @@ async def entrypoint(ctx: agents.JobContext):
 
     await ctx.connect()
 
-    try:
-        await session.generate_reply(
-            instructions="Greet the user. Let them know you can generate images with Nano Banana and play real-time music with Lyria. Mention they can enable their camera for visual context."
-        )
-    except Exception as exc:
-        logger.warning("Initial greeting failed: %s", exc)
+    if REALTIME_MODEL != "gemini-3.1-flash-live-preview":
+        try:
+            await session.generate_reply(
+                instructions="Greet the user. Let them know you can generate images with Nano Banana 2 and play real-time music with Lyria. Mention they can enable their camera for visual context."
+            )
+        except Exception as exc:
+            logger.warning("Initial greeting failed: %s", exc)
 
 
 if __name__ == "__main__":

examples/livekit-gemini-hacker-starter/agent/pyproject.toml

@@ -4,8 +4,8 @@ version = "0.1.0"
 description = "Gemini hackathon starter — voice, vision, image generation, and real-time music with LiveKit"
 requires-python = ">=3.10,<3.14"
 dependencies = [
-    "livekit-agents[google,images]~=1.4",
-    "google-genai>=1.16.0",
+    "livekit-agents[google,images]>=1.6.4,<1.7",
+    "google-genai>=2.10.0,<3",
     "python-dotenv>=1.0.0",
 ]
 

examples/livekit-gemini-hacker-starter/frontend/app-config.ts

@@ -25,7 +25,7 @@ export const APP_CONFIG_DEFAULTS: AppConfig = {
   companyName: 'Gemini Hackathon',
   pageTitle: 'Gemini Hacker Starter',
   pageDescription:
-    'Voice, vision, image generation, and real-time music with Gemini 2.5 native audio, Nano Banana, and Lyria',
+    'Voice, vision, image generation, and real-time music with Gemini 3.1 Live, Nano Banana 2, and Lyria',
 
   supportsChatInput: true,
   supportsVideoInput: true,

examples/livekit-gemini-hacker-starter/frontend/components/app/welcome-view.tsx

@@ -34,7 +34,7 @@ export const WelcomeView = ({
         <WelcomeImage />
 
         <p className="text-foreground max-w-prose pt-1 leading-6 font-medium">
-          Voice, vision, images, and music — powered by Gemini 3.1, NanoBanana 2, and Lyria
+          Voice, vision, images, and music — powered by Gemini 3.1 Live, NanoBanana 2, and Lyria
         </p>
 
         <Button