diff --git a/Endpoints/ChatEndpoint.cs b/Endpoints/ChatEndpoint.cs
index 640929c..9b1f9ad 100644
--- a/Endpoints/ChatEndpoint.cs
+++ b/Endpoints/ChatEndpoint.cs
@@ -70,9 +70,14 @@ public static class ChatEndpoint
 
         var modelId = agent.Model switch
         {
-            "opus" => "claude-opus-4-6",
             "sonnet" => "claude-sonnet-4-6",
+            "sonnet-4-5" => "claude-sonnet-4-5",
+            "sonnet-4-6" => "claude-sonnet-4-6",
+            "opus" => "claude-opus-4-6",
+            "opus-4-5" => "claude-opus-4-5",
+            "opus-4-6" => "claude-opus-4-6",
             "haiku" => "claude-haiku-4-5",
+            "haiku-4-5" => "claude-haiku-4-5",
             _ => "claude-sonnet-4-6"
         };
 
diff --git a/Models/AgentRecord.cs b/Models/AgentRecord.cs
index de50504..af90eec 100644
--- a/Models/AgentRecord.cs
+++ b/Models/AgentRecord.cs
@@ -7,7 +7,7 @@ public class AgentRecord
     public string Name { get; set; }
     public string Avatar { get; set; }          // base64 data url
     public string Description { get; set; }
-    public string Model { get; set; }           // sonnet, opus, haiku
+    public string Model { get; set; }           // sonnet, sonnet-4-5, sonnet-4-6, opus, opus-4-5, opus-4-6, haiku, haiku-4-5
     public string ToolChoice { get; set; }      // "any" oder "auto"
     public string CustomCommands { get; set; }
     public string AutoCommit { get; set; } = "";  // "", "mention", "forbid"
diff --git a/Services/TelegramService.cs b/Services/TelegramService.cs
index 4653d5c..9296757 100644
--- a/Services/TelegramService.cs
+++ b/Services/TelegramService.cs
@@ -312,9 +312,14 @@ public class TelegramService
     {
         var modelId = agent.Model switch
         {
-            "opus" => "claude-opus-4-6",
             "sonnet" => "claude-sonnet-4-6",
+            "sonnet-4-5" => "claude-sonnet-4-5",
+            "sonnet-4-6" => "claude-sonnet-4-6",
+            "opus" => "claude-opus-4-6",
+            "opus-4-5" => "claude-opus-4-5",
+            "opus-4-6" => "claude-opus-4-6",
             "haiku" => "claude-haiku-4-5",
+            "haiku-4-5" => "claude-haiku-4-5",
             _ => "claude-sonnet-4-6"
         };
 
diff --git a/wwwroot/index.html b/wwwroot/index.html
index e7786c1..9835cb5 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -136,9 +136,11 @@
         <input type="text" id="agentDescription" placeholder="Kurze Beschreibung (optional)">
         <label>Model</label>
         <select id="agentModel">
-          <option value="sonnet">Sonnet 4.6</option>
-          <option value="opus">Opus 4.6</option>
-          <option value="haiku">Haiku 4.5</option>
+          <option value="sonnet-4-5">Sonnet 4.5</option>
+          <option value="sonnet-4-6">Sonnet 4.6</option>
+          <option value="opus-4-5">Opus 4.5</option>
+          <option value="opus-4-6">Opus 4.6</option>
+          <option value="haiku-4-5">Haiku 4.5</option>
         </select>
         <label class="checkbox-label">
           <input type="checkbox" id="agentToolChoice" checked>
diff --git a/wwwroot/js/ui.js b/wwwroot/js/ui.js
index bd4f63b..646802d 100644
--- a/wwwroot/js/ui.js
+++ b/wwwroot/js/ui.js
@@ -6,17 +6,15 @@ const metaEl = () => $('#meta');
 
 function prettyModelName(model) {
   if (!model) return '?';
-  var m = model.match(/claude-(\w+)-(\d+)(?:-(\d+))?/);
-  if (m) {
-    var family = m[1].charAt(0).toUpperCase() + m[1].slice(1);
-    var major = m[2];
-    var minor = m[3];
-    if (minor && minor.length <= 2) return family + ' ' + major + '.' + minor;
-    return family + ' ' + major;
-  }
-  if (model == 'sonnet') return 'Sonnet 4.6'
-  if (model == 'opus') return 'Opus 4.6'
-  if (model == 'haiku') return 'Haiku 4.5'
+  model = model.split('claude-').join('');
+  if (model == 'sonnet') return 'Sonnet';
+  if (model == 'sonnet-4-5') return 'Sonnet 4.5';
+  if (model == 'sonnet-4-6') return 'Sonnet 4.6';
+  if (model == 'opus') return 'Opus';
+  if (model == 'opus-4-5') return 'Opus 4.5';
+  if (model == 'opus-4-6') return 'Opus 4.6';
+  if (model == 'haiku') return 'Haiku';
+  if (model == 'haiku-4-5') return 'Haiku 4.5';
   return 'Unbekannt (' + model + ')';
 }