From 79da3563748336cf430fe1b5ad19b193c3c3a033 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 8 May 2026 06:29:41 +0000
Subject: [PATCH] feat(google): add serviceTier option to LLM

Ports livekit/agents#5680 to add a `serviceTier` option (e.g.
`ServiceTier.PRIORITY`) that is passed through to the Gemini
GenerateContentConfig.
---
 .changeset/google-llm-service-tier.md | 5 +++++
 plugins/google/src/llm.ts             | 8 ++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 .changeset/google-llm-service-tier.md

diff --git a/.changeset/google-llm-service-tier.md b/.changeset/google-llm-service-tier.md
new file mode 100644
index 000000000..52ad7cc9c
--- /dev/null
+++ b/.changeset/google-llm-service-tier.md
@@ -0,0 +1,5 @@
+---
+'@livekit/agents-plugin-google': patch
+---
+
+feat(google): add `serviceTier` option to LLM (e.g. `ServiceTier.PRIORITY`)
diff --git a/plugins/google/src/llm.ts b/plugins/google/src/llm.ts
index d36815b1e..ebd8b1f42 100644
--- a/plugins/google/src/llm.ts
+++ b/plugins/google/src/llm.ts
@@ -37,6 +37,7 @@ export interface LLMOptions {
   geminiTools?: LLMTools;
   httpOptions?: types.HttpOptions;
   seed?: number;
+  serviceTier?: types.ServiceTier;
 }
 
 export class LLM extends llm.LLM {
@@ -85,6 +86,7 @@ export class LLM extends llm.LLM {
    * @param geminiTools - The Gemini-specific tools to use for the session.
    * @param httpOptions - The HTTP options to use for the session.
    * @param seed - Random seed for reproducible results. Defaults to undefined.
+   * @param serviceTier - The service tier for the request (e.g. ServiceTier.PRIORITY). Defaults to undefined.
    */
   constructor(
     {
@@ -105,6 +107,7 @@ export class LLM extends llm.LLM {
       geminiTools,
       httpOptions,
       seed,
+      serviceTier,
     }: LLMOptions = {
       model: 'gemini-2.0-flash-001',
     },
@@ -175,6 +178,7 @@ export class LLM extends llm.LLM {
       geminiTools,
       httpOptions,
       seed,
+      serviceTier,
       apiKey,
     };
   }
@@ -266,6 +270,10 @@ export class LLM extends llm.LLM {
       extras.automaticFunctionCalling = this.#opts.automaticFunctionCallingConfig;
     }
 
+    if (this.#opts.serviceTier !== undefined) {
+      extras.serviceTier = this.#opts.serviceTier;
+    }
+
     geminiTools = geminiTools !== undefined ? geminiTools : this.#opts.geminiTools;
 
     return new LLMStream(this, {