diff --git a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
index 231a822ef1..a107340464 100644
--- a/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
+++ b/codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
@@ -10307,15 +10307,11 @@
       },
       "ModelAvailabilityNux": {
         "properties": {
-          "id": {
-            "type": "string"
-          },
           "message": {
             "type": "string"
           }
         },
         "required": [
-          "id",
           "message"
         ],
         "type": "object"
diff --git a/codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json b/codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json
index 992e966faf..4023f76b51 100644
--- a/codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json
+++ b/codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json
@@ -104,15 +104,11 @@
     },
     "ModelAvailabilityNux": {
       "properties": {
-        "id": {
-          "type": "string"
-        },
         "message": {
           "type": "string"
         }
       },
       "required": [
-        "id",
         "message"
       ],
       "type": "object"
diff --git a/codex-rs/app-server-protocol/schema/typescript/v2/ModelAvailabilityNux.ts b/codex-rs/app-server-protocol/schema/typescript/v2/ModelAvailabilityNux.ts
index b0254a68b5..7254aaec9b 100644
--- a/codex-rs/app-server-protocol/schema/typescript/v2/ModelAvailabilityNux.ts
+++ b/codex-rs/app-server-protocol/schema/typescript/v2/ModelAvailabilityNux.ts
@@ -2,4 +2,4 @@
 
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 
-export type ModelAvailabilityNux = { id: string, message: string, };
+export type ModelAvailabilityNux = { message: string, };
diff --git a/codex-rs/app-server-protocol/src/protocol/v2.rs b/codex-rs/app-server-protocol/src/protocol/v2.rs
index ad6c26f8a4..32bc120f6d 100644
--- a/codex-rs/app-server-protocol/src/protocol/v2.rs
+++ b/codex-rs/app-server-protocol/src/protocol/v2.rs
@@ -1394,14 +1394,12 @@ pub struct ModelListParams {
 #[serde(rename_all = "camelCase")]
 #[ts(export_to = "v2/")]
 pub struct ModelAvailabilityNux {
-    pub id: String,
     pub message: String,
 }
 
 impl From<CoreModelAvailabilityNux> for ModelAvailabilityNux {
     fn from(value: CoreModelAvailabilityNux) -> Self {
         Self {
-            id: value.id,
             message: value.message,
         }
     }
diff --git a/codex-rs/protocol/src/openai_models.rs b/codex-rs/protocol/src/openai_models.rs
index 85b79939d1..b63f137442 100644
--- a/codex-rs/protocol/src/openai_models.rs
+++ b/codex-rs/protocol/src/openai_models.rs
@@ -101,7 +101,6 @@ pub struct ModelUpgrade {
 
 #[derive(Debug, Clone, Deserialize, Serialize, TS, JsonSchema, PartialEq, Eq)]
 pub struct ModelAvailabilityNux {
-    pub id: String,
     pub message: String,
 }
 
@@ -720,7 +719,6 @@ mod tests {
     fn model_preset_preserves_availability_nux() {
         let preset = ModelPreset::from(ModelInfo {
             availability_nux: Some(ModelAvailabilityNux {
-                id: "try_spark".to_string(),
                 message: "Try Spark.".to_string(),
             }),
             ..test_model(None)
@@ -729,7 +727,6 @@ mod tests {
         assert_eq!(
             preset.availability_nux,
             Some(ModelAvailabilityNux {
-                id: "try_spark".to_string(),
                 message: "Try Spark.".to_string(),
             })
         );