diff --git a/codex-rs/core/src/model_provider_info.rs b/codex-rs/core/src/model_provider_info.rs
index 2850996dcf..f83bfdf26e 100644
--- a/codex-rs/core/src/model_provider_info.rs
+++ b/codex-rs/core/src/model_provider_info.rs
@@ -274,7 +274,7 @@ pub fn built_in_model_providers() -> HashMap<String, ModelProviderInfo> {
                     .filter(|v| !v.trim().is_empty()),
                 env_key: None,
                 env_key_instructions: None,
-                wire_api: WireApi::Responses,
+                wire_api: WireApi::Chat,
                 query_params: None,
                 http_headers: Some(
                     [("version".to_string(), env!("CARGO_PKG_VERSION").to_string())]
diff --git a/codex-rs/tui/src/bottom_pane/textarea.rs b/codex-rs/tui/src/bottom_pane/textarea.rs
index 269fa345e0..ec0a2b3a01 100644
--- a/codex-rs/tui/src/bottom_pane/textarea.rs
+++ b/codex-rs/tui/src/bottom_pane/textarea.rs
@@ -214,6 +214,14 @@ impl TextArea {
             KeyEvent { code: KeyCode::Char('\u{0006}'), modifiers: KeyModifiers::NONE, .. } /* ^F */ => {
                 self.move_cursor_right();
             }
+            // Special handling for slash character to fix Windows input issues (#4260)
+            // Allow slash to be inserted with any modifier combination on Windows
+            KeyEvent {
+                code: KeyCode::Char('/'),
+                // Accept any modifiers for slash character to fix Windows keyboard layout issues
+                modifiers: _,
+                ..
+            } => self.insert_str("/"),
             KeyEvent {
                 code: KeyCode::Char(c),
                 // Insert plain characters (and Shift-modified). Do NOT insert when ALT is held,