diff --git a/frontend/src/i18n.tsx b/frontend/src/i18n.tsx
index 420258e..c22aa18 100644
--- a/frontend/src/i18n.tsx
+++ b/frontend/src/i18n.tsx
@@ -57,7 +57,7 @@ const english = {
   "或手动输入模型 ID": "Or enter a model ID",
   "手动输入模型 ID": "Enter a model ID",
   "例如 gpt-4.1": "For example, gpt-4.1",
-  "例如 deepseek/deepseek-v3": "For example, deepseek/deepseek-v3",
+  "例如 deepseek/deepseek-v4-pro": "For example, deepseek/deepseek-v4-pro",
   "例如 siliconflow": "For example, siliconflow",
   "例如 team-ppio": "For example, team-ppio",
   "留空则使用 Profile ID": "Leave blank to use the Profile ID",
diff --git a/frontend/src/pages/AgentProfilePage.tsx b/frontend/src/pages/AgentProfilePage.tsx
index ce805a0..6ec8877 100644
--- a/frontend/src/pages/AgentProfilePage.tsx
+++ b/frontend/src/pages/AgentProfilePage.tsx
@@ -211,7 +211,7 @@ export function AgentProfilePage() {
             </div>
             <div className="field-stack profile-editor-wide">
               <label htmlFor="agent-profile-model">{t("模型")}</label>
-              <input id="agent-profile-model" value={draft.model} onChange={(event) => setDraft({ ...draft, model: event.target.value })} placeholder={t("例如 deepseek/deepseek-v3")} required />
+              <input id="agent-profile-model" value={draft.model} onChange={(event) => setDraft({ ...draft, model: event.target.value })} placeholder={t("例如 deepseek/deepseek-v4-pro")} required />
             </div>
           </div>
           <p className="profile-key-hint">
diff --git a/frontend/src/pages/ProfilesPage.tsx b/frontend/src/pages/ProfilesPage.tsx
index 30aff79..1da7cf0 100644
--- a/frontend/src/pages/ProfilesPage.tsx
+++ b/frontend/src/pages/ProfilesPage.tsx
@@ -257,7 +257,7 @@ export function ProfilesPage() {
             </div>
             <div className="field-stack profile-editor-wide">
               <label htmlFor="profile-model">{t("模型")}</label>
-              <input id="profile-model" value={editor.model} onChange={(event) => setEditor({ ...editor, model: event.target.value })} placeholder={t("例如 deepseek/deepseek-v3")} required />
+              <input id="profile-model" value={editor.model} onChange={(event) => setEditor({ ...editor, model: event.target.value })} placeholder={t("例如 deepseek/deepseek-v4-pro")} required />
             </div>
             {/* The key is the Provider's, so this only reports whether that
                 Provider has one and links to where it is set. */}
diff --git a/frontend/src/pages/ProviderKeyPage.tsx b/frontend/src/pages/ProviderKeyPage.tsx
index 799fde9..3154cfc 100644
--- a/frontend/src/pages/ProviderKeyPage.tsx
+++ b/frontend/src/pages/ProviderKeyPage.tsx
@@ -130,7 +130,7 @@ export function ProviderKeyPage() {
             className="text-field"
             value={state.probeModel}
             onChange={(event) => dispatch({ type: "SET_PROBE_MODEL", value: event.target.value })}
-            placeholder={t("例如 deepseek/deepseek-v3")}
+            placeholder={t("例如 deepseek/deepseek-v4-pro")}
             spellCheck={false}
           />
           <small>{t("可选，仅用于测试连接；实际配置模型在下一步选择")}</small>
diff --git a/manifests/providers.lock.json b/manifests/providers.lock.json
index c2caae4..5d9f7a1 100644
--- a/manifests/providers.lock.json
+++ b/manifests/providers.lock.json
@@ -1,13 +1,13 @@
 {
   "schema_version": 1,
-  "default_fallback_probe_model": "deepseek/deepseek-v3",
+  "default_fallback_probe_model": "deepseek/deepseek-v4-pro",
   "providers": {
     "ppio": {
       "name": "PPIO",
       "home": "https://ppio.com/",
       "base_url": "https://api.ppio.com/openai",
       "anthropic_base_url": "https://api.ppio.com/anthropic",
-      "fallback_probe_model": "deepseek/deepseek-v3",
+      "fallback_probe_model": "deepseek/deepseek-v4-pro",
       "relationship": "sponsor",
       "disclosure": "PPIO sponsors OneAgent development. Sponsorship does not affect Agent rank, compatibility conclusions, default selection, or connection tests.",
       "referral_url": "",
@@ -23,7 +23,7 @@
       "home": "https://novita.ai/",
       "base_url": "https://api.novita.ai/openai",
       "anthropic_base_url": "https://api.novita.ai/anthropic",
-      "fallback_probe_model": "deepseek/deepseek_v3",
+      "fallback_probe_model": "deepseek/deepseek-v4-pro",
       "relationship": "sponsor",
       "disclosure": "Novita sponsors OneAgent development. Sponsorship does not affect Agent rank, compatibility conclusions, default selection, or connection tests.",
       "referral_url": "",