diff --git a/plugins/openai/src/realtime/api_proto.ts b/plugins/openai/src/realtime/api_proto.ts
index ed07a34e6..75e66c3e6 100644
--- a/plugins/openai/src/realtime/api_proto.ts
+++ b/plugins/openai/src/realtime/api_proto.ts
@@ -91,17 +91,26 @@ export interface Tool {
   };
 }
 
-export type TurnDetectionType = {
-  type: 'server_vad';
-  threshold?: number; // 0.0 to 1.0, default: 0.5
-  prefix_padding_ms?: number; // default: 300
-  silence_duration_ms?: number; // default: 200
-  create_response?: boolean; // default: true
-  interrupt_response?: boolean; // default: true
-};
+export type TurnDetectionType =
+  | {
+      type: 'semantic_vad';
+      eagerness?: 'auto' | 'low' | 'medium' | 'high'; // default: auto
+      create_response?: boolean; // default: true
+      interrupt_response?: boolean; // default: true
+    }
+  | {
+      type: 'server_vad';
+      threshold?: number; // 0.0 to 1.0, default: 0.5
+      prefix_padding_ms?: number; // default: 300
+      silence_duration_ms?: number; // default: 200
+      create_response?: boolean; // default: true
+      interrupt_response?: boolean; // default: true
+    };
 
 export type InputAudioTranscription = {
   model: InputTranscriptionModel;
+  language?: string;
+  prompt?: string;
 };
 
 export interface InputTextContent {
diff --git a/plugins/openai/src/realtime/realtime_model.ts b/plugins/openai/src/realtime/realtime_model.ts
index 53a085bd9..a93bf9b6b 100644
--- a/plugins/openai/src/realtime/realtime_model.ts
+++ b/plugins/openai/src/realtime/realtime_model.ts
@@ -22,7 +22,6 @@ import {
 import { Mutex } from '@livekit/mutex';
 import type { AudioResampler } from '@livekit/rtc-node';
 import { AudioFrame, combineAudioFrames } from '@livekit/rtc-node';
-import type { GenerationCreatedEvent } from 'agents/dist/llm/realtime.js';
 import { type MessageEvent, WebSocket } from 'ws';
 import * as api_proto from './api_proto.js';
 
@@ -1011,7 +1010,7 @@ export class RealtimeSession extends llm.RealtimeSession {
       messageStream: this.currentGeneration.messageChannel.stream(),
       functionStream: this.currentGeneration.functionChannel.stream(),
       userInitiated: false,
-    } as GenerationCreatedEvent;
+    } as llm.GenerationCreatedEvent;
 
     const clientEventId = event.response.metadata?.client_event_id;
     if (clientEventId) {
@@ -1414,7 +1413,7 @@ export class RealtimeSession extends llm.RealtimeSession {
       messageStream: this.currentGeneration.messageChannel.stream(),
       functionStream: this.currentGeneration.functionChannel.stream(),
       userInitiated: false,
-    } as GenerationCreatedEvent;
+    } as llm.GenerationCreatedEvent;
 
     const handle = this.responseCreatedFutures[responseId];
     if (handle) {