diff --git a/src-tauri/src/codex_config.rs b/src-tauri/src/codex_config.rs
index 5f1a7ddb6..ac9b43bf1 100644
--- a/src-tauri/src/codex_config.rs
+++ b/src-tauri/src/codex_config.rs
@@ -766,7 +766,10 @@ pub fn read_codex_model_catalog_simplified_from_live() -> Result<Option<Value>,
 /// Given `config.toml` text, resolve the on-disk path of the cc-switch–owned
 /// catalog file (returns `None` if `model_catalog_json` is absent or points at
 /// a file we don't own). Relative paths fall back to `generated_path`.
-fn resolve_cc_switch_catalog_path(config_text: &str, generated_path: &Path) -> Option<PathBuf> {
+pub(crate) fn resolve_cc_switch_catalog_path(
+    config_text: &str,
+    generated_path: &Path,
+) -> Option<PathBuf> {
     if config_text.trim().is_empty() {
         return None;
     }
diff --git a/src-tauri/src/proxy/handlers.rs b/src-tauri/src/proxy/handlers.rs
index 96076470d..93a51e65c 100644
--- a/src-tauri/src/proxy/handlers.rs
+++ b/src-tauri/src/proxy/handlers.rs
@@ -62,6 +62,41 @@ pub async fn get_status(State(state): State<ProxyState>) -> Result<Json<ProxySta
     Ok(Json(status))
 }
 
+/// GET /v1/models — Codex model list (reachability check)
+///
+/// Codex CLI probes this endpoint at startup and deserializes the response as a
+/// catalog with a top-level `models` field.  Return the cc-switch–managed model
+/// catalog file directly so the format always matches what the current version
+/// of Codex expects.
+///
+/// Only serves the catalog when the live config.toml still references the
+/// cc-switch–owned `model_catalog_json`, using the same path ownership rules as
+/// Codex live-setting import.
+pub async fn handle_models() -> Result<Json<Value>, ProxyError> {
+    let generated_path = crate::codex_config::get_codex_model_catalog_path();
+    let active_catalog_path = match crate::codex_config::read_codex_config_text() {
+        Ok(config_text) => {
+            crate::codex_config::resolve_cc_switch_catalog_path(&config_text, &generated_path)
+        }
+        Err(_) => None,
+    };
+
+    let catalog = if let Some(catalog_path) =
+        active_catalog_path.as_ref().filter(|path| path.exists())
+    {
+        let text = std::fs::read_to_string(catalog_path).unwrap_or_default();
+        serde_json::from_str(&text).unwrap_or(json!({"models": []}))
+    } else {
+        if active_catalog_path.is_none() {
+            log::debug!(
+                "[models] stale guard: catalog not served (model_catalog_json not set to cc-switch catalog)"
+            );
+        }
+        json!({"models": []})
+    };
+    Ok(Json(catalog))
+}
+
 // ============================================================================
 // Claude API 处理器（包含格式转换逻辑）
 // ============================================================================
diff --git a/src-tauri/src/proxy/server.rs b/src-tauri/src/proxy/server.rs
index b4c551e35..e7b6f601b 100644
--- a/src-tauri/src/proxy/server.rs
+++ b/src-tauri/src/proxy/server.rs
@@ -315,6 +315,9 @@ impl ProxyServer {
                 "/codex/v1/chat/completions",
                 post(handlers::handle_chat_completions),
             )
+            // OpenAI Models API (Codex CLI reachability check)
+            .route("/models", get(handlers::handle_models))
+            .route("/v1/models", get(handlers::handle_models))
             // OpenAI Responses API (Codex CLI，支持带前缀和不带前缀)
             .route("/responses", post(handlers::handle_responses))
             .route("/v1/responses", post(handlers::handle_responses))