diff --git a/codex-rs/core/src/conversation_manager.rs b/codex-rs/core/src/conversation_manager.rs
index 22f73dfe12..e527507c1c 100644
--- a/codex-rs/core/src/conversation_manager.rs
+++ b/codex-rs/core/src/conversation_manager.rs
@@ -47,7 +47,7 @@ impl ConversationManager {
             conversations: Arc::new(RwLock::new(HashMap::new())),
             auth_manager: auth_manager.clone(),
             session_source,
-            models_manager: Arc::new(ModelsManager::new(auth_manager.get_auth_mode())),
+            models_manager: Arc::new(ModelsManager::new(auth_manager)),
         }
     }
 
diff --git a/codex-rs/core/src/openai_models/models_manager.rs b/codex-rs/core/src/openai_models/models_manager.rs
index 23124f10d5..5863a3670e 100644
--- a/codex-rs/core/src/openai_models/models_manager.rs
+++ b/codex-rs/core/src/openai_models/models_manager.rs
@@ -1,8 +1,21 @@
+use std::sync::Arc;
+
+use codex_api::ModelsClient;
+use codex_api::ReqwestTransport;
 use codex_app_server_protocol::AuthMode;
+use codex_protocol::openai_models::ModelInfo;
 use codex_protocol::openai_models::ModelPreset;
+use http::HeaderMap;
 use tokio::sync::RwLock;
 
+use crate::AuthManager;
+use crate::api_bridge::auth_provider_from_auth;
+use crate::api_bridge::map_api_error;
+use crate::auth::CodexAuth;
 use crate::config::Config;
+use crate::default_client::build_reqwest_client;
+use crate::error::Result;
+use crate::model_provider_info::ModelProviderInfo;
 use crate::openai_models::model_family::ModelFamily;
 use crate::openai_models::model_family::find_family_for_model;
 use crate::openai_models::model_presets::builtin_model_presets;
@@ -11,24 +24,41 @@ use crate::openai_models::model_presets::builtin_model_presets;
 pub struct ModelsManager {
     pub available_models: RwLock<Vec<ModelPreset>>,
     pub etag: String,
-    pub auth_mode: Option<AuthMode>,
+    pub auth_manager: Arc<AuthManager>,
 }
 
 impl ModelsManager {
-    pub fn new(auth_mode: Option<AuthMode>) -> Self {
+    pub fn new(auth_manager: Arc<AuthManager>) -> Self {
         Self {
-            available_models: RwLock::new(builtin_model_presets(auth_mode)),
+            available_models: RwLock::new(builtin_model_presets(auth_manager.get_auth_mode())),
             etag: String::new(),
-            auth_mode,
+            auth_manager,
         }
     }
 
     pub async fn refresh_available_models(&self) {
-        let models = builtin_model_presets(self.auth_mode);
+        let models = builtin_model_presets(self.auth_manager.get_auth_mode());
         *self.available_models.write().await = models;
     }
 
     pub fn construct_model_family(&self, model: &str, config: &Config) -> ModelFamily {
         find_family_for_model(model).with_config_overrides(config)
     }
+
+    pub async fn fetch_models_from_api(
+        &self,
+        provider: &ModelProviderInfo,
+    ) -> Result<Vec<ModelInfo>> {
+        let api_provider = provider.to_api_provider(self.auth_manager.get_auth_mode())?;
+        let api_auth = auth_provider_from_auth(self.auth_manager.auth(), provider).await?;
+        let transport = ReqwestTransport::new(build_reqwest_client());
+        let client = ModelsClient::new(transport, api_provider, api_auth);
+
+        let response = client
+            .list_models(env!("CARGO_PKG_VERSION"), HeaderMap::new())
+            .await
+            .map_err(map_api_error)?;
+
+        Ok(response.models)
+    }
 }