diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3511a55..ed7a3df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## v3.10.0 (2026-05-25)
+
+**Provider Model Editor + Antigravity Model Refresh**
+
+### Provider Editor
+- **Remove Selected** button to remove highlighted model(s) from provider
+- **Clear All** button to empty model list
+- **Sync from Preset** button to refresh model list from current preset definition
+- Preset sync now replaces (not appends) models — fixes stale saved model lists
+
+### Antigravity Models Updated
+- **Gemini 3.5 Flash** (High / Medium)
+- **Gemini 3.1 Pro** (High / Low)
+- **Claude Sonnet 4.6 Thinking**
+- **Claude Opus 4.6 Thinking**
+- **GPT-OSS 120B Medium**
+
 ## v3.9.9 (2026-05-25)
 
 **Antigravity Model Refresh**
diff --git a/codex-launcher_3.10.0_all.deb b/codex-launcher_3.10.0_all.deb
new file mode 100644
index 0000000..668df2a
Binary files /dev/null and b/codex-launcher_3.10.0_all.deb differ
diff --git a/install.sh b/install.sh
index 79ad396..f1e7266 100755
--- a/install.sh
+++ b/install.sh
@@ -3,11 +3,11 @@ set -e
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 
-if [ -f "$SCRIPT_DIR/codex-launcher_3.9.9_all.deb" ]; then
-    echo "Installing codex-launcher_3.9.9_all.deb ..."
-    sudo dpkg -i "$SCRIPT_DIR/codex-launcher_3.9.9_all.deb"
+if [ -f "$SCRIPT_DIR/codex-launcher_3.10.0_all.deb" ]; then
+    echo "Installing codex-launcher_3.10.0_all.deb ..."
+    sudo dpkg -i "$SCRIPT_DIR/codex-launcher_3.10.0_all.deb"
     echo ""
-    echo "Installed v3.9.9 via .deb package."
+    echo "Installed v3.10.0 via .deb package."
     echo "  translate-proxy.py   -> /usr/bin/translate-proxy.py"
     echo "  codex-launcher-gui   -> /usr/bin/codex-launcher-gui"
     echo "  cleanup-codex-stale  -> /usr/bin/cleanup-codex-stale.sh"
diff --git a/src/codex-launcher-gui b/src/codex-launcher-gui
index bd65e74..9ca1e96 100755
--- a/src/codex-launcher-gui
+++ b/src/codex-launcher-gui
@@ -26,6 +26,11 @@ model_catalog_json = ""
 """
 
 CHANGELOG = [
+    ("3.10.0", "2026-05-25", [
+        "Provider editor: Remove Selected, Clear All, Sync from Preset buttons for model list",
+        "Sync from Preset replaces model list with current preset models",
+        "Stale saved Antigravity models auto-refreshed on preset sync",
+    ]),
     ("3.9.9", "2026-05-25", [
         "Refresh Antigravity preset: Gemini 3.5 Flash, Gemini 3.1 Pro, Claude Sonnet/Opus 4.6, GPT-OSS 120B",
         "Fix Antigravity alias map for new tiered model IDs (high/medium/low/thinking)",
@@ -1752,7 +1757,7 @@ class LauncherWin(Gtk.Window):
         # header row
         hdr = Gtk.Box(spacing=8)
         vbox.pack_start(hdr, False, False, 0)
-        lbl = Gtk.Label(label="<b>Codex Launcher v3.9.9</b>")
+        lbl = Gtk.Label(label="<b>Codex Launcher v3.10.0</b>")
         lbl.set_use_markup(True)
         hdr.pack_start(lbl, False, False, 0)
         changelog_btn = Gtk.Button(label="Changelog")
@@ -3138,6 +3143,18 @@ class EditEndpointDialog(Gtk.Dialog):
         sw.add(self._model_tree)
         self._model_tree.connect("row-activated", lambda t, p, c: self._remove_model(p))
 
+        model_btn_box = Gtk.Box(spacing=6)
+        area.pack_start(model_btn_box, False, False, 0)
+        self._remove_model_btn = Gtk.Button(label="Remove Selected")
+        self._remove_model_btn.connect("clicked", lambda b: self._remove_selected_model())
+        model_btn_box.pack_start(self._remove_model_btn, False, False, 0)
+        self._clear_models_btn = Gtk.Button(label="Clear All")
+        self._clear_models_btn.connect("clicked", lambda b: self._clear_all_models())
+        model_btn_box.pack_start(self._clear_models_btn, False, False, 0)
+        self._sync_preset_btn = Gtk.Button(label="Sync from Preset")
+        self._sync_preset_btn.connect("clicked", lambda b: self._apply_selected_preset())
+        model_btn_box.pack_start(self._sync_preset_btn, False, False, 0)
+
         for m in self._data.get("models", []):
             self._model_store.append([m])
 
@@ -3207,10 +3224,12 @@ class EditEndpointDialog(Gtk.Dialog):
             cc_ver = preset.get("cc_version", "")
             if cc_ver and not self._entry_cc_ver.get_text().strip():
                 self._entry_cc_ver.set_text(cc_ver)
-            if preset.get("models") and len(self._model_store) == 0:
-                for mid in preset["models"]:
-                    self._model_store.append([mid])
-                self._refresh_default_combo(preset["models"][0])
+        if preset.get("models") and (not initial or len(self._model_store) == 0):
+            current = self._combo_default.get_active_text()
+            self._model_store.clear()
+            for mid in preset["models"]:
+                self._model_store.append([mid])
+            self._refresh_default_combo(current or preset["models"][0])
         if initial and self._data.get("models"):
             self._refresh_default_combo(self._data.get("default_model", ""))
 
@@ -3542,7 +3561,7 @@ class EditEndpointDialog(Gtk.Dialog):
                 auth_url = "https://codebuff.com/api/auth/cli/code"
                 body = json.dumps({"fingerprintId": fingerprint_id}).encode()
                 req = urllib.request.Request(auth_url, data=body,
-                    headers={"Content-Type": "application/json", "User-Agent": "codex-launcher/3.9.9"})
+                    headers={"Content-Type": "application/json", "User-Agent": "codex-launcher/3.10.0"})
                 resp = urllib.request.urlopen(req, timeout=30)
                 data = json.loads(resp.read())
                 login_url = data.get("loginUrl", "") or data.get("login_url", "")
@@ -3567,7 +3586,7 @@ class EditEndpointDialog(Gtk.Dialog):
                     time.sleep(2)
                     try:
                         poll_req = urllib.request.Request(poll_url,
-                            headers={"User-Agent": "codex-launcher/3.9.9"})
+                            headers={"User-Agent": "codex-launcher/3.10.0"})
                         poll_resp = urllib.request.urlopen(poll_req, timeout=10)
                         poll_data = json.loads(poll_resp.read())
                         user = poll_data.get("user")
@@ -3632,6 +3651,21 @@ class EditEndpointDialog(Gtk.Dialog):
         self._model_store.remove(self._model_store.get_iter(path))
         self._refresh_default_combo(current)
 
+    def _remove_selected_model(self):
+        sel = self._model_tree.get_selection()
+        model, paths = sel.get_selected_rows()
+        if not paths:
+            return
+        current = self._combo_default.get_active_text()
+        for p in reversed(paths):
+            self._model_store.remove(self._model_store.get_iter(p))
+        self._refresh_default_combo(current)
+
+    def _clear_all_models(self):
+        current = self._combo_default.get_active_text()
+        self._model_store.clear()
+        self._refresh_default_combo(current)
+
     def _refresh_default_combo(self, active=None):
         if active is None:
             active = self._combo_default.get_active_text()
diff --git a/src/translate-proxy.py b/src/translate-proxy.py
index ede42a8..0015378 100755
--- a/src/translate-proxy.py
+++ b/src/translate-proxy.py
@@ -335,7 +335,7 @@ def _codebuff_get_session(token, model):
         req = urllib.request.Request(url, data=body, headers={
             "Content-Type": "application/json",
             "Authorization": f"Bearer {token}",
-            "User-Agent": "codex-launcher/3.9.9",
+            "User-Agent": "codex-launcher/3.10.0",
             "x-codebuff-model": model,
         })
         try:
@@ -383,7 +383,7 @@ def _codebuff_start_run(token, agent_id):
     req = urllib.request.Request(url, data=body, headers={
         "Content-Type": "application/json",
         "Authorization": f"Bearer {token}",
-        "User-Agent": "codex-launcher/3.9.9",
+        "User-Agent": "codex-launcher/3.10.0",
     })
     try:
         resp = urllib.request.urlopen(req, timeout=15)
@@ -416,7 +416,7 @@ def _codebuff_finish_run(token, run_id, status="completed"):
     req = urllib.request.Request(url, data=body, headers={
         "Content-Type": "application/json",
         "Authorization": f"Bearer {token}",
-        "User-Agent": "codex-launcher/3.9.9",
+        "User-Agent": "codex-launcher/3.10.0",
     })
     try:
         urllib.request.urlopen(req, timeout=10)
@@ -5314,7 +5314,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
              headers = {
                  "Content-Type": "application/json",
                  "Authorization": f"Bearer {token}",
-                 "User-Agent": "codex-launcher/3.9.9",
+                 "User-Agent": "codex-launcher/3.10.0",
                  "x-codebuff-model": model,
              }
              if instance_id:
@@ -5480,7 +5480,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
         if body.get("tool_choice"):
             chat_body["tool_choice"] = body["tool_choice"]
         target = f"{_CODEBUFF_API_URL}/api/v1/chat/completions"
-        headers = {"Content-Type": "application/json", "Authorization": f"Bearer {token}", "User-Agent": "codex-launcher/3.9.9", "x-codebuff-model": model}
+        headers = {"Content-Type": "application/json", "Authorization": f"Bearer {token}", "User-Agent": "codex-launcher/3.10.0", "x-codebuff-model": model}
         if instance_id:
             headers["x-codebuff-instance-id"] = instance_id
         print(f"[codebuff] retry POST {target} model={model} stream={stream} run={run_id} (thinking disabled via DeepSeek native)", file=sys.stderr)