From 2506e29188fa1cb836080cd29e61cb69e3d2d4a2 Mon Sep 17 00:00:00 2001
From: AssemblyAI <engineering.sdk@assemblyai.com>
Date: Tue, 28 Oct 2025 03:26:28 -0700
Subject: [PATCH 1/2] Project import generated by Copybara.

GitOrigin-RevId: ad224a848ad094d931b98cc76a921d550ed6dd8e
---
 package.json                      | 2 +-
 src/services/streaming/service.ts | 4 ++++
 src/types/streaming/index.ts      | 3 +++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 5cc5390..ad3c440 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "assemblyai",
-  "version": "4.18.4",
+  "version": "4.18.5",
   "description": "The AssemblyAI JavaScript SDK provides an easy-to-use interface for interacting with the AssemblyAI API, which supports async and real-time transcription, as well as the latest LeMUR models.",
   "engines": {
     "node": ">=18"
diff --git a/src/services/streaming/service.ts b/src/services/streaming/service.ts
index 92bac99..8b8430a 100644
--- a/src/services/streaming/service.ts
+++ b/src/services/streaming/service.ts
@@ -124,6 +124,10 @@ export class StreamingTranscriber {
       );
     }
 
+    if (this.params.speechModel) {
+      searchParams.set("speech_model", this.params.speechModel.toString());
+    }
+
     url.search = searchParams.toString();
 
     return url;
diff --git a/src/types/streaming/index.ts b/src/types/streaming/index.ts
index 388d296..7443fe5 100644
--- a/src/types/streaming/index.ts
+++ b/src/types/streaming/index.ts
@@ -13,6 +13,7 @@ export type StreamingTranscriberParams = {
   filterProfanity?: boolean;
   keyterms?: string[];
   keytermsPrompt?: string[];
+  speechModel?: StreamingSpeechModel;
 };
 
 export type StreamingEvents = "open" | "close" | "turn" | "error";
@@ -24,6 +25,8 @@ export type StreamingListeners = {
   error?: (error: Error) => void;
 };
 
+export type StreamingSpeechModel = "universal-streaming-english" | "universal-streaming-multilingual";
+
 export type StreamingTokenParams = {
   expires_in_seconds: number;
   max_session_duration_seconds?: number;

From 2ecec0d51d041066f46f208685881671b1d632fd Mon Sep 17 00:00:00 2001
From: dan-ince-aai <dince@assemblyai.com>
Date: Tue, 28 Oct 2025 10:32:11 +0000
Subject: [PATCH 2/2] lint

---
 src/types/streaming/index.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/types/streaming/index.ts b/src/types/streaming/index.ts
index 7443fe5..3faf00e 100644
--- a/src/types/streaming/index.ts
+++ b/src/types/streaming/index.ts
@@ -25,7 +25,9 @@ export type StreamingListeners = {
   error?: (error: Error) => void;
 };
 
-export type StreamingSpeechModel = "universal-streaming-english" | "universal-streaming-multilingual";
+export type StreamingSpeechModel =
+  | "universal-streaming-english"
+  | "universal-streaming-multilingual";
 
 export type StreamingTokenParams = {
   expires_in_seconds: number;