diff --git a/src/api/constants.ts b/src/api/constants.ts
index 9b3b9e4..79fdbcd 100644
--- a/src/api/constants.ts
+++ b/src/api/constants.ts
@@ -245,6 +245,14 @@ export const VERBIO_STT_MODELS = [
 
 export const DEFAULT_VERBIO_MODEL = "V1";
 
+// ASSEMBLYAI
+export const ASSEMBLYAI_STT_VERSIONS = [
+  { name: "V2", value: "v2" },
+  { name: "V3", value: "v3" },
+];
+
+export const DEFAULT_ASSEMBLYAI_STT_VERSION = "v2";
+
 export const ADDITIONAL_SPEECH_VENDORS: Lowercase<Vendor>[] = ["speechmatics"];
 
 // Google Custom Voice reported usage options
diff --git a/src/api/types.ts b/src/api/types.ts
index 5da0783..6089461 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -432,6 +432,7 @@ export interface SpeechCredential {
   stt_model_id: null | string;
   voice_engine: null | string;
   engine_version: null | string;
+  service_version: null | string;
   model: null | string;
   options: null | string;
   deepgram_stt_uri: null | string;
diff --git a/src/containers/internal/views/speech-services/form.tsx b/src/containers/internal/views/speech-services/form.tsx
index 20c39fc..7199af3 100644
--- a/src/containers/internal/views/speech-services/form.tsx
+++ b/src/containers/internal/views/speech-services/form.tsx
@@ -81,6 +81,8 @@ import type {
 import { setAccountFilter, setLocation } from "src/store/localStore";
 import {
   ADDITIONAL_SPEECH_VENDORS,
+  ASSEMBLYAI_STT_VERSIONS,
+  DEFAULT_ASSEMBLYAI_STT_VERSION,
   DEFAULT_CARTESIA_OPTIONS,
   DEFAULT_ELEVENLABS_OPTIONS,
   DEFAULT_GOOGLE_CUSTOM_VOICE,
@@ -131,6 +133,9 @@ export const SpeechServiceForm = ({ credential }: SpeechServiceFormProps) => {
   const [ttsModelId, setTtsModelId] = useState("");
   const [sttModelId, setSttModelId] = useState("");
   const [engineVersion, setEngineVersion] = useState(DEFAULT_VERBIO_MODEL);
+  const [serviceVersion, setServiceVersion] = useState(
+    DEFAULT_ASSEMBLYAI_STT_VERSION,
+  );
   const [instanceId, setInstanceId] = useState("");
   const [initialCheckCustomTts, setInitialCheckCustomTts] = useState(false);
   const [initialCheckCustomStt, setInitialCheckCustomStt] = useState(false);
@@ -468,6 +473,9 @@ export const SpeechServiceForm = ({ credential }: SpeechServiceFormProps) => {
         ...(vendor === VENDOR_VERBIO && {
           engine_version: engineVersion,
         }),
+        ...(vendor === VENDOR_ASSEMBLYAI && {
+          service_version: serviceVersion || null,
+        }),
         ...(vendor === VENDOR_PLAYHT && {
           playht_tts_uri: playhtTtsUri || null,
         }),
@@ -842,6 +850,9 @@ export const SpeechServiceForm = ({ credential }: SpeechServiceFormProps) => {
     if (credential?.data?.engine_version) {
       setEngineVersion(credential.data.engine_version);
     }
+    if (credential?.data?.service_version) {
+      setServiceVersion(credential.data.service_version);
+    }
 
     if (credential?.data?.speechmatics_stt_uri) {
       setInitialSpeechMaticsOnpremCheck(
@@ -1522,6 +1533,22 @@ export const SpeechServiceForm = ({ credential }: SpeechServiceFormProps) => {
             </fieldset>
           </>
         )}
+        {vendor === VENDOR_ASSEMBLYAI && (
+          <fieldset>
+            <label htmlFor={`${vendor}_tts_model_id`}>
+              Service version<span>*</span>
+            </label>
+            <Selector
+              id={"assemblyai_service_version"}
+              name={"assemblyai_service_version"}
+              value={serviceVersion}
+              options={ASSEMBLYAI_STT_VERSIONS}
+              onChange={(e) => {
+                setServiceVersion(e.target.value);
+              }}
+            />
+          </fieldset>
+        )}
         {vendor === VENDOR_AWS && (
           <fieldset>
             <label htmlFor="vendor">