diff --git a/apps/desktop/src/components/cursor/CursorModelEditor.tsx b/apps/desktop/src/components/cursor/CursorModelEditor.tsx
index 753858c..49b5a01 100644
--- a/apps/desktop/src/components/cursor/CursorModelEditor.tsx
+++ b/apps/desktop/src/components/cursor/CursorModelEditor.tsx
@@ -78,10 +78,13 @@ export function CursorModelEditor({ draft, providers, editing, modelOptions, dis
         { value: "openai-responses", label: "OpenAI Responses", icon: openAiIcon }, { value: "openai-chat", label: "OpenAI Chat", icon: openAiIcon }, { value: "anthropic", label: "Anthropic", icon: claudeIcon },
       ]} onChange={(endpointType) => setEndpointType(endpointType as ProviderType)} /></FormField>
       {(editing || draft.modelIds.length <= 1) && <FormField label={t("显示名称")} hint={t("仅用于界面展示，不会改变发送给上游的模型名称。")}><TextInput placeholder="例如：GPT-4.1" value={draft.model.display_name} onChange={(event) => setModel({ display_name: event.target.value })} /></FormField>}
-      <FormField className={styles.fullWidth} label={t("模型名称")} hint={editing ? t("可以直接输入模型标识，也可以从当前上游返回的模型列表中选择。") : t("支持选择或输入多个模型；批量添加时显示名称默认使用对应模型名称。")}>{editing
+      <FormField label={t("模型名称")} hint={editing ? t("可以直接输入模型标识，也可以从当前上游返回的模型列表中选择。") : t("支持选择或输入多个模型；批量添加时显示名称默认使用对应模型名称。")}>{editing
         ? <Combobox value={draft.model.model_id} options={modelOptions} placeholder="例如：gpt-4.1" append={<button type="button" className={controls.secondary} disabled={discovering || !canDiscover} onClick={onDiscover}>{discovering ? t("获取中…") : t("获取模型")}</button>} onChange={(model_id) => setModel({ model_id, display_name: draft.model.display_name || model_id })} />
         : <MultiCombobox value={draft.modelIds} options={modelOptions} placeholder="例如：gpt-4.1" append={<button type="button" className={controls.secondary} disabled={discovering || !canDiscover} onClick={onDiscover}>{discovering ? t("获取中…") : t("获取模型")}</button>} onChange={setModelIds} />
       }</FormField>
+      <FormField label={t("自定义上下文")} hint={t("输入 token 数后，将作为额外选项添加到 Cursor 模型的 Context 列表；只有在 Cursor 中选中该选项时才会生效。")}>
+        <TextInput type="number" min={1} step={1} aria-label={t("自定义上下文 tokens")} placeholder={t("例如：272000")} value={draft.model.context_window_tokens ?? ""} onChange={(event) => setModel({ context_window_tokens: event.target.value === "" ? null : Math.trunc(Number(event.target.value)) })} />
+      </FormField>
       <div className={styles.fullWidth}><Checkbox label={t("自定义请求完整地址")} checked={draft.customRequestUrl} onChange={(customRequestUrl) => onChange({ ...draft, customRequestUrl, model: { ...draft.model, request_url: customRequestUrl ? draft.model.request_url : "" } })} /></div>
       {draft.customRequestUrl && <FormField className={styles.fullWidth} label={t("请求完整地址")} hint={t("支持完整 HTTP(S) 地址或以 / 开头、与上游地址组合的相对路径。")}><TextInput placeholder="例如：https://api.example.com/v1/chat/completions" value={draft.model.request_url} onChange={(event) => setModel({ request_url: event.target.value })} /></FormField>}
       {!editing && draft.providerMode === "new" && <>
diff --git a/apps/desktop/src/i18n/generated/catalog.json b/apps/desktop/src/i18n/generated/catalog.json
index e44b9b8..32969c8 100644
--- a/apps/desktop/src/i18n/generated/catalog.json
+++ b/apps/desktop/src/i18n/generated/catalog.json
@@ -38,7 +38,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 92,
+          "line": 95,
           "column": 39
         }
       ]
@@ -190,7 +190,7 @@
       "refs": [
         {
           "file": "pages/CursorSettingsPage.tsx",
-          "line": 256,
+          "line": 257,
           "column": 89
         }
       ]
@@ -243,7 +243,7 @@
         {
           "file": "components/cursor/CursorModelEditor.tsx",
           "line": 81,
-          "column": 119
+          "column": 90
         }
       ]
     },
@@ -390,7 +390,7 @@
       "refs": [
         {
           "file": "pages/CursorSettingsPage.tsx",
-          "line": 255,
+          "line": 256,
           "column": 36
         },
         {
@@ -511,12 +511,12 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 89,
+          "line": 92,
           "column": 56
         },
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 89,
+          "line": 92,
           "column": 141
         },
         {
@@ -731,12 +731,12 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 88,
+          "line": 91,
           "column": 56
         },
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 88,
+          "line": 91,
           "column": 123
         },
         {
@@ -912,7 +912,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 85,
+          "line": 88,
           "column": 58
         }
       ]
@@ -1596,7 +1596,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 88,
+          "line": 91,
           "column": 78
         },
         {
@@ -1632,6 +1632,18 @@
         }
       ]
     },
+    "5cca0b7972a11f3a": {
+      "source": "自定义上下文必须是大于 0 的整数",
+      "kind": "text",
+      "placeholders": [],
+      "refs": [
+        {
+          "file": "pages/CursorSettingsPage.tsx",
+          "line": 238,
+          "column": 171
+        }
+      ]
+    },
     "5d59857bf039cac9": {
       "source": "Cursor 助手 v{version}",
       "kind": "template",
@@ -1777,7 +1789,7 @@
       "refs": [
         {
           "file": "api.ts",
-          "line": 289,
+          "line": 290,
           "column": 43
         }
       ]
@@ -2070,7 +2082,7 @@
       "refs": [
         {
           "file": "api.ts",
-          "line": 284,
+          "line": 285,
           "column": 43
         }
       ]
@@ -2132,12 +2144,12 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 92,
+          "line": 95,
           "column": 73
         },
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 92,
+          "line": 95,
           "column": 122
         }
       ]
@@ -2209,7 +2221,7 @@
       "refs": [
         {
           "file": "api.ts",
-          "line": 230,
+          "line": 231,
           "column": 21
         }
       ]
@@ -2255,7 +2267,7 @@
       "refs": [
         {
           "file": "pages/CursorSettingsPage.tsx",
-          "line": 250,
+          "line": 251,
           "column": 21
         }
       ]
@@ -2318,7 +2330,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 89,
+          "line": 92,
           "column": 85
         }
       ]
@@ -2443,7 +2455,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 86,
+          "line": 89,
           "column": 100
         }
       ]
@@ -2479,7 +2491,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 86,
+          "line": 89,
           "column": 81
         }
       ]
@@ -2559,7 +2571,7 @@
         {
           "file": "components/cursor/CursorModelEditor.tsx",
           "line": 81,
-          "column": 81
+          "column": 52
         }
       ]
     },
@@ -2592,6 +2604,18 @@
         }
       ]
     },
+    "9d8f2ef4e85ea665": {
+      "source": "自定义上下文 tokens",
+      "kind": "text",
+      "placeholders": [],
+      "refs": [
+        {
+          "file": "components/cursor/CursorModelEditor.tsx",
+          "line": 86,
+          "column": 63
+        }
+      ]
+    },
     "9e46da6923836182": {
       "source": "如：2026-08-23 09:00、1小时前",
       "kind": "text",
@@ -3117,12 +3141,12 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 93,
+          "line": 96,
           "column": 66
         },
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 93,
+          "line": 96,
           "column": 115
         }
       ]
@@ -3286,16 +3310,28 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 94,
+          "line": 97,
           "column": 66
         },
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 94,
+          "line": 97,
           "column": 115
         }
       ]
     },
+    "c6cc835023617457": {
+      "source": "自定义上下文",
+      "kind": "text",
+      "placeholders": [],
+      "refs": [
+        {
+          "file": "components/cursor/CursorModelEditor.tsx",
+          "line": 85,
+          "column": 25
+        }
+      ]
+    },
     "c7ea2c9bc43134bd": {
       "source": "编辑模型",
       "kind": "text",
@@ -3386,7 +3422,7 @@
         {
           "file": "components/cursor/CursorModelEditor.tsx",
           "line": 81,
-          "column": 54
+          "column": 25
         }
       ]
     },
@@ -3443,7 +3479,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 94,
+          "line": 97,
           "column": 39
         }
       ]
@@ -3477,6 +3513,18 @@
         }
       ]
     },
+    "d27db596b73a0a66": {
+      "source": "例如：272000",
+      "kind": "text",
+      "placeholders": [],
+      "refs": [
+        {
+          "file": "components/cursor/CursorModelEditor.tsx",
+          "line": 86,
+          "column": 96
+        }
+      ]
+    },
     "d2d648bd1c94b7f9": {
       "source": "认证",
       "kind": "text",
@@ -3555,7 +3603,7 @@
         {
           "file": "components/ProviderEditor.tsx",
           "line": 26,
-          "column": 190
+          "column": 180
         }
       ]
     },
@@ -3758,7 +3806,7 @@
       "refs": [
         {
           "file": "components/cursor/CursorModelEditor.tsx",
-          "line": 93,
+          "line": 96,
           "column": 39
         }
       ]
@@ -3866,6 +3914,18 @@
         }
       ]
     },
+    "e671f8c7598139ef": {
+      "source": "输入 token 数后，将作为额外选项添加到 Cursor 模型的 Context 列表；只有在 Cursor 中选中该选项时才会生效。",
+      "kind": "text",
+      "placeholders": [],
+      "refs": [
+        {
+          "file": "components/cursor/CursorModelEditor.tsx",
+          "line": 85,
+          "column": 44
+        }
+      ]
+    },
     "e6ca887f22288cde": {
       "source": "Model ID 和显示名称不能为空",
       "kind": "text",
diff --git a/apps/desktop/src/i18n/locales/en-US.json b/apps/desktop/src/i18n/locales/en-US.json
index bd18bfe..2f6f72b 100644
--- a/apps/desktop/src/i18n/locales/en-US.json
+++ b/apps/desktop/src/i18n/locales/en-US.json
@@ -110,6 +110,7 @@
   "5ae715656ffbc35d": "Merge into the request body for every model from this provider.",
   "5b17f59d33bde39e": "Error: {error}",
   "5c55a67935af8f45": "All",
+  "5cca0b7972a11f3a": "Custom context must be an integer greater than 0",
   "5d59857bf039cac9": "Cursor Assistant v{version}",
   "5f8d556a9c47da3c": "Launch at login disabled",
   "5f9acfb945229062": "Are you sure you no longer want to see this ad?",
@@ -180,6 +181,7 @@
   "9a026819dd1af5c5": "Enter a model identifier directly or select one returned by the current provider.",
   "9ac0ac940982895d": "Select provider",
   "9c41b3a9e12ac994": "Reasoning effort",
+  "9d8f2ef4e85ea665": "Custom context tokens",
   "9e46da6923836182": "For example: 2026-08-23 09:00, 1 hour ago",
   "9f6fee1aba17a565": "Language",
   "9fb48101d237ff96": "Last week",
@@ -227,6 +229,7 @@
   "c1e98892a77f7a19": "{count} per page",
   "c3760858cdb6d9f4": "Request body",
   "c62a58459251b02c": "Image generation",
+  "c6cc835023617457": "Custom context",
   "c7ea2c9bc43134bd": "Edit model",
   "c8df3c14a003bfcd": "Unable to load call details",
   "c98e118e0a43f078": "Model",
@@ -239,6 +242,7 @@
   "cfe999e50be8ef54": "Whether the model declares image-generation support.",
   "d0bfccc77315d887": "Last month",
   "d15a909c3490a7e0": "Endpoint type",
+  "d27db596b73a0a66": "For example: 272000",
   "d2d648bd1c94b7f9": "Authentication",
   "d30d35c5ec4a888d": "Select or enter at least one model",
   "d34335433395cd3a": "Start Cursor BYOK automatically after signing in.",
@@ -269,6 +273,7 @@
   "e5043c7a2b408271": "Last 10 minutes",
   "e59ae97924d62f01": "First page",
   "e5b9961a0d5242e3": "Port settings saved. Restart the app to apply them.",
+  "e671f8c7598139ef": "After entering a token count, it is added as an extra option to the Cursor model Context list. It only takes effect when selected in Cursor.",
   "e6ca887f22288cde": "Model ID and display name are required",
   "e77e3d58b0dcffaa": "Duration",
   "e828bd3a0151edc2": "The local CA must be trusted by the system",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.json b/apps/desktop/src/i18n/locales/zh-CN.json
index 9ea7ce3..589fa4b 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.json
+++ b/apps/desktop/src/i18n/locales/zh-CN.json
@@ -110,6 +110,7 @@
   "5ae715656ffbc35d": "合并到该上游所有模型的请求体。",
   "5b17f59d33bde39e": "错误：{error}",
   "5c55a67935af8f45": "全部",
+  "5cca0b7972a11f3a": "自定义上下文必须是大于 0 的整数",
   "5d59857bf039cac9": "Cursor 助手 v{version}",
   "5f8d556a9c47da3c": "已关闭开机启动",
   "5f9acfb945229062": "你确认不想再看到此广告吗？",
@@ -180,6 +181,7 @@
   "9a026819dd1af5c5": "可以直接输入模型标识，也可以从当前上游返回的模型列表中选择。",
   "9ac0ac940982895d": "选择上游",
   "9c41b3a9e12ac994": "思考强度",
+  "9d8f2ef4e85ea665": "自定义上下文 tokens",
   "9e46da6923836182": "如：2026-08-23 09:00、1小时前",
   "9f6fee1aba17a565": "语言",
   "9fb48101d237ff96": "近一周",
@@ -227,6 +229,7 @@
   "c1e98892a77f7a19": "{count} 条/页",
   "c3760858cdb6d9f4": "请求体",
   "c62a58459251b02c": "图片生成",
+  "c6cc835023617457": "自定义上下文",
   "c7ea2c9bc43134bd": "编辑模型",
   "c8df3c14a003bfcd": "无法加载调用详情",
   "c98e118e0a43f078": "模型",
@@ -239,6 +242,7 @@
   "cfe999e50be8ef54": "是否声明模型支持图片生成。",
   "d0bfccc77315d887": "近一个月",
   "d15a909c3490a7e0": "端点类型",
+  "d27db596b73a0a66": "例如：272000",
   "d2d648bd1c94b7f9": "认证",
   "d30d35c5ec4a888d": "请至少选择或输入一个模型",
   "d34335433395cd3a": "登录系统后自动启动 Cursor BYOK。",
@@ -269,6 +273,7 @@
   "e5043c7a2b408271": "近10分钟",
   "e59ae97924d62f01": "第一页",
   "e5b9961a0d5242e3": "端口设置已保存，重启软件后生效",
+  "e671f8c7598139ef": "输入 token 数后，将作为额外选项添加到 Cursor 模型的 Context 列表；只有在 Cursor 中选中该选项时才会生效。",
   "e6ca887f22288cde": "Model ID 和显示名称不能为空",
   "e77e3d58b0dcffaa": "耗时",
   "e828bd3a0151edc2": "需要在系统中信任本地 CA",
diff --git a/apps/desktop/src/pages/CursorSettingsPage.tsx b/apps/desktop/src/pages/CursorSettingsPage.tsx
index 0577f7f..c0e0d0f 100644
--- a/apps/desktop/src/pages/CursorSettingsPage.tsx
+++ b/apps/desktop/src/pages/CursorSettingsPage.tsx
@@ -55,7 +55,7 @@ export function CursorSettingsPage() {
     next.model = {
       model_id: model.model_id, display_name: model.display_name, enabled: model.enabled, sort_order: model.sort_order,
       endpoint_type: model.endpoint_type, request_url: model.request_url,
-      context_window_tokens: null, max_output_tokens: null,
+      context_window_tokens: model.context_window_tokens, max_output_tokens: null,
       reasoning_enabled: model.reasoning_enabled, reasoning_effort: null,
       supports_image_generation: model.supports_image_generation,
     };
@@ -235,6 +235,7 @@ function cursorModelInputs(draft: CursorModelDraft, editing: boolean) {
   if (!modelIds.length) throw new Error(t("请至少选择或输入一个模型"));
   if (editing && !draft.model.display_name.trim()) throw new Error(t("Model ID 和显示名称不能为空"));
   if (draft.customRequestUrl && !draft.model.request_url.trim()) throw new Error(t("请求完整地址不能为空"));
+  if (draft.model.context_window_tokens !== null && (!Number.isSafeInteger(draft.model.context_window_tokens) || draft.model.context_window_tokens <= 0)) throw new Error(t("自定义上下文必须是大于 0 的整数"));
   return modelIds.map((modelId, index) => ({
     ...draft.model,
     model_id: modelId,
diff --git a/server/src/cursor/model_catalog.rs b/server/src/cursor/model_catalog.rs
index 3b29e9f..2a7364e 100644
--- a/server/src/cursor/model_catalog.rs
+++ b/server/src/cursor/model_catalog.rs
@@ -205,6 +205,43 @@ const EFFORTS: [(&str, &str); 5] = [
 ];
 const DEFAULT_CONTEXT: &str = "200k";
 
+fn context_options(model: &ProviderModel) -> Vec<(String, String)> {
+    let mut contexts = CONTEXTS
+        .into_iter()
+        .map(|(value, display_name)| (value.to_owned(), display_name.to_owned()))
+        .collect::<Vec<_>>();
+    if let Some(tokens) = model.context_window_tokens {
+        let value = tokens.to_string();
+        let duplicate = contexts
+            .iter()
+            .any(|(existing, _)| parse_context_tokens(existing) == Some(tokens));
+        if !duplicate {
+            contexts.push((value, format!("{} (Custom)", format_token_count(tokens))));
+        }
+    }
+    contexts
+}
+
+fn parse_context_tokens(value: &str) -> Option<u64> {
+    let value = value.trim().to_ascii_lowercase();
+    let (number, multiplier) = match value.chars().last()? {
+        'k' => (&value[..value.len() - 1], 1_000),
+        'm' => (&value[..value.len() - 1], 1_000_000),
+        _ => (value.as_str(), 1),
+    };
+    number.parse::<u64>().ok()?.checked_mul(multiplier)
+}
+
+fn format_token_count(tokens: u64) -> String {
+    if tokens >= 1_000_000 && tokens.is_multiple_of(1_000_000) {
+        format!("{}M", tokens / 1_000_000)
+    } else if tokens >= 1_000 && tokens.is_multiple_of(1_000) {
+        format!("{}K", tokens / 1_000)
+    } else {
+        tokens.to_string()
+    }
+}
+
 pub async fn available_models(
     State(registry): State<CursorSessionRegistry>,
     Extension(proxy): Extension<CursorProxy>,
@@ -324,7 +361,8 @@ fn unary_payload(body: &Bytes) -> Result<(bool, &[u8])> {
 }
 
 fn available_model(model: &ProviderModel, provider_name: &str) -> AvailableModel {
-    let variants = model_variants(model);
+    let contexts = context_options(model);
+    let variants = model_variants(model, &contexts);
     let legacy_slugs = variants
         .iter()
         .filter_map(|variant| variant.legacy_slug.clone())
@@ -348,7 +386,7 @@ fn available_model(model: &ProviderModel, provider_name: &str) -> AvailableModel
         inputbox_short_model_name: Some(model.display_name.clone()),
         supports_sandboxing: Some(true),
         supports_cmd_k: Some(false),
-        parameter_definitions: model_parameters(),
+        parameter_definitions: model_parameters(&contexts),
         variants,
         legacy_slugs,
         named_model_section_index: Some(1),
@@ -365,7 +403,7 @@ fn available_model(model: &ProviderModel, provider_name: &str) -> AvailableModel
     }
 }
 
-fn model_parameters() -> Vec<ModelParameterDefinition> {
+fn model_parameters(contexts: &[(String, String)]) -> Vec<ModelParameterDefinition> {
     vec![
         ModelParameterDefinition {
             id: "context".into(),
@@ -374,11 +412,11 @@ fn model_parameters() -> Vec<ModelParameterDefinition> {
             parameter_type: Some(ModelParameterType {
                 boolean_parameter: None,
                 enum_parameter: Some(EnumParameter {
-                    values: CONTEXTS
-                        .into_iter()
+                    values: contexts
+                        .iter()
                         .map(|(value, display_name)| EnumParameterValue {
-                            value: value.into(),
-                            display_name: Some(display_name.into()),
+                            value: value.clone(),
+                            display_name: Some(display_name.clone()),
                         })
                         .collect(),
                 }),
@@ -429,9 +467,9 @@ fn model_parameters() -> Vec<ModelParameterDefinition> {
     ]
 }
 
-fn model_variants(model: &ProviderModel) -> Vec<ModelVariant> {
-    let mut variants = Vec::with_capacity(CONTEXTS.len() * EFFORTS.len() * 2);
-    for (context, context_name) in CONTEXTS {
+fn model_variants(model: &ProviderModel, contexts: &[(String, String)]) -> Vec<ModelVariant> {
+    let mut variants = Vec::with_capacity(contexts.len() * EFFORTS.len() * 2);
+    for (context, context_name) in contexts {
         for (effort, effort_name) in EFFORTS {
             for fast in [false, true] {
                 variants.push(model_variant(
@@ -546,7 +584,7 @@ mod tests {
             request_url: String::new(),
             enabled: true,
             sort_order: 0,
-            context_window_tokens: Some(200_000),
+            context_window_tokens: Some(272_000),
             max_output_tokens: None,
             reasoning_enabled: false,
             reasoning_effort: None,
@@ -591,7 +629,22 @@ mod tests {
             .iter()
             .map(|value| value.value.as_str())
             .collect::<Vec<_>>();
-        assert_eq!(context_values, ["200k", "356k", "800k", "1m"]);
+        assert_eq!(context_values, ["200k", "356k", "800k", "1m", "272000"]);
+        let custom_context = context
+            .parameter_type
+            .as_ref()
+            .unwrap()
+            .enum_parameter
+            .as_ref()
+            .unwrap()
+            .values
+            .iter()
+            .find(|value| value.value == "272000")
+            .unwrap();
+        assert_eq!(
+            custom_context.display_name.as_deref(),
+            Some("272K (Custom)")
+        );
         let effort = mapped
             .parameter_definitions
             .iter()
@@ -607,8 +660,8 @@ mod tests {
             .values
             .iter()
             .any(|value| value.value == "max"));
-        assert_eq!(mapped.variants.len(), 40);
-        assert_eq!(mapped.legacy_slugs.len(), 40);
+        assert_eq!(mapped.variants.len(), 50);
+        assert_eq!(mapped.legacy_slugs.len(), 50);
         assert_eq!(mapped.model_picker_badges.len(), 1);
         assert_eq!(mapped.model_picker_badges[0].label, "OpenRouter");
         assert!(!mapped.model_picker_badges[0].dismiss_on_selection);