feat(api): Add gpt-realtime models

Adds gpt-realtime and gpt-realtime-2025-08-28

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 118
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-f312a661d9dd6b5d6d676e449c357f6414afd1fdaaf4d982d44ad86cba5c5f6e.yml
-openapi_spec_hash: b62fd3d3fb98e37b1da0a2e22af51d40
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-51afd6abbcb18c3086f62993f9379c18443b9e516cbc0548ddfb932e835657f8.yml
+openapi_spec_hash: dae6afeaefa15cb8700c7a870531e06f
 config_hash: b854932c0ea24b400bdd64e4376936bd

src/resources/realtime/realtime.ts

@@ -2218,6 +2218,8 @@ export interface RealtimeSession {
    * The Realtime model used for this session.
    */
   model?:
+    | 'gpt-realtime'
+    | 'gpt-realtime-2025-08-28'
     | 'gpt-4o-realtime-preview'
     | 'gpt-4o-realtime-preview-2024-10-01'
     | 'gpt-4o-realtime-preview-2024-12-17'
@@ -2480,6 +2482,8 @@ export interface RealtimeSessionCreateRequest {
    */
   model:
     | (string & {})
+    | 'gpt-realtime'
+    | 'gpt-realtime-2025-08-28'
     | 'gpt-4o-realtime'
     | 'gpt-4o-mini-realtime'
     | 'gpt-4o-realtime-preview'