diff --git a/src/preview.rs b/src/preview.rs
index 37bc501..ba9b7db 100644
--- a/src/preview.rs
+++ b/src/preview.rs
@@ -73,7 +73,9 @@ fn model() {
         ("medium", "medium"),
         ("high", "high"),
         ("xhigh", "xhigh"),
-        ("缺失/未知", ""),
+        ("max", "max"),
+        ("未知", "xxhigh thinking"),
+        ("缺失", ""),
     ] {
         println!("  {} {}", pad(label, 10), widgets::model::combined("Opus 4.8 (1M context)", level));
     }
diff --git a/src/widgets/model.rs b/src/widgets/model.rs
index b182e89..9ea47b2 100644
--- a/src/widgets/model.rs
+++ b/src/widgets/model.rs
@@ -6,7 +6,7 @@ use crate::status::Status;
 /// 固定配色：柔蓝。
 const COLOR: (u8, u8, u8) = palette::BLUE;
 
-/// 如 `H opus-4.8`；思考缺失时只剩 `opus-4.8`；模型缺失时 `-`。
+/// 如 `H opus-4.8`；思考缺失时等级位显示 `-`；模型缺失时模型名 `-`。
 pub fn render(status: &Status) -> String {
     let name = status
         .model
@@ -28,11 +28,8 @@ pub fn combined(name: &str, level: &str) -> String {
     let model = color::fg(&name_format(name), r, g, b);
 
     let think = thinking_format(level);
-    if think == "-" {
-        return model;
-    }
     let (r, g, b) = thinking_color(level);
-    format!("{} {model}", color::fg(think, r, g, b))
+    format!("{} {model}", color::fg(&think, r, g, b))
 }
 
 /// 模型名规范化：去 ` (...)` 后缀 → 小写 → 空格转 `-`，如 `Opus 4.8 (1M context)` → `opus-4.8`。
@@ -41,25 +38,29 @@ fn name_format(name: &str) -> String {
     stripped.to_lowercase().replace(' ', "-")
 }
 
-/// 思考等级简写：low→L, medium→M, high→H, xhigh→XH；缺失/未知 `-`。
-fn thinking_format(level: &str) -> &'static str {
+/// 思考等级简写：low→L, medium→M, high→H, xhigh→XH, max→MAX。
+/// 没给等级（空串）显示 `-`；其它未知等级一律原样显示（大小写不动），
+/// 免得没见过的等级被悄悄吞掉或被改了样子。
+fn thinking_format(level: &str) -> String {
     match level {
-        "low" => "L",
-        "medium" => "M",
-        "high" => "H",
-        "xhigh" => "XH",
-        _ => "-",
+        "" => "-".into(),
+        "low" => "L".into(),
+        "medium" => "M".into(),
+        "high" => "H".into(),
+        "xhigh" => "XH".into(),
+        "max" => "MAX".into(),
+        other => other.to_string(),
     }
 }
 
-/// 思考等级配色：越高越「热」。L 绿 → M 黄 → H 橙 → XH 红。
+/// 思考等级配色：越高越「热」。L 绿 → M 黄 → H 橙 → XH/MAX 红；未知等级与缺失(`-`)用灰。
 fn thinking_color(level: &str) -> (u8, u8, u8) {
     match level {
         "low" => palette::GREEN,
         "medium" => palette::YELLOW,
         "high" => palette::ORANGE,
-        "xhigh" => palette::RED,
-        _ => palette::GRAY, // 兜底，正常走不到
+        "xhigh" | "max" => palette::RED,
+        _ => palette::GRAY,
     }
 }
 
@@ -75,20 +76,39 @@ mod tests {
     }
 
     #[test]
-    fn thinking_format_known_and_unknown() {
+    fn thinking_format_known_levels() {
         assert_eq!(thinking_format("low"), "L");
         assert_eq!(thinking_format("medium"), "M");
         assert_eq!(thinking_format("high"), "H");
         assert_eq!(thinking_format("xhigh"), "XH");
-        assert_eq!(thinking_format("bogus"), "-");
+        assert_eq!(thinking_format("max"), "MAX");
+    }
+
+    #[test]
+    fn thinking_format_unknown_shown_verbatim() {
+        // 未知等级要原样显示，大小写不改。
+        assert_eq!(thinking_format("xxhigh thinking"), "xxhigh thinking");
+        assert_eq!(thinking_format("Ultra"), "Ultra");
+    }
+
+    #[test]
+    fn thinking_format_empty_is_dash() {
         assert_eq!(thinking_format(""), "-");
     }
 
     #[test]
-    fn combined_drops_thinking_when_level_unknown() {
-        // 等级未知时只剩模型名，前面不该挂等级。
-        let only_model = combined("Sonnet 4.6", "");
-        assert!(only_model.contains("sonnet-4.6"));
-        assert!(!only_model.contains('H'));
+    fn combined_shows_dash_when_level_empty() {
+        // 等级缺失时用 `-` 占位，仍然显示。
+        let s = combined("Sonnet 4.6", "");
+        assert!(s.contains("sonnet-4.6"));
+        assert!(s.contains('-'));
+    }
+
+    #[test]
+    fn combined_shows_unknown_level_verbatim() {
+        // 未知等级（如 deepseek 的 xxhigh thinking）原样显示出来。
+        let s = combined("Opus 4.8", "xxhigh thinking");
+        assert!(s.contains("opus-4.8"));
+        assert!(s.contains("xxhigh thinking"));
     }
 }