diff --git a/apps/rebreak-native/components/urge/LlmProviderToggle.tsx b/apps/rebreak-native/components/urge/LlmProviderToggle.tsx
index d921a6a..ff7f968 100644
--- a/apps/rebreak-native/components/urge/LlmProviderToggle.tsx
+++ b/apps/rebreak-native/components/urge/LlmProviderToggle.tsx
@@ -1,7 +1,7 @@
 import { Pressable, Text, View } from 'react-native';
 import { LLM_PROVIDER_LABEL, type LlmProvider, useLlmProvider } from '../../lib/llmProvider';
 
-const PROVIDERS: LlmProvider[] = ['openrouter-sonnet', 'openrouter-haiku', 'groq-llama'];
+const PROVIDERS: LlmProvider[] = ['auto', 'openrouter-sonnet', 'openrouter-haiku', 'groq-llama'];
 
 export function LlmProviderToggle() {
   const [current, set] = useLlmProvider();
diff --git a/apps/rebreak-native/lib/llmProvider.ts b/apps/rebreak-native/lib/llmProvider.ts
index 8ad44b8..3fb32ba 100644
--- a/apps/rebreak-native/lib/llmProvider.ts
+++ b/apps/rebreak-native/lib/llmProvider.ts
@@ -6,12 +6,15 @@
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useEffect, useState } from 'react';
 
-export type LlmProvider = 'openrouter-sonnet' | 'openrouter-haiku' | 'groq-llama';
+export type LlmProvider = 'auto' | 'openrouter-sonnet' | 'openrouter-haiku' | 'groq-llama';
 
 const STORAGE_KEY = 'rebreak-sos-llm-provider';
-const DEFAULT_PROVIDER: LlmProvider = 'openrouter-sonnet';
+// Default 'auto' → backend wählt nach plan: Pro=Groq, Legend=Haiku, Free=Groq.
+// Explicit-Toggles (Sonnet/Haiku/Groq) sind debug-overrides und bypassen plan-logic.
+const DEFAULT_PROVIDER: LlmProvider = 'auto';
 
 export const LLM_PROVIDER_LABEL: Record<LlmProvider, string> = {
+  auto: 'Auto',
   'openrouter-sonnet': 'Sonnet',
   'openrouter-haiku': 'Haiku',
   'groq-llama': 'Groq',
@@ -24,7 +27,9 @@ export async function loadLlmProvider(): Promise<LlmProvider> {
   if (cached) return cached;
   const raw = await AsyncStorage.getItem(STORAGE_KEY).catch(() => null);
   cached =
-    raw === 'openrouter-haiku' || raw === 'groq-llama' ? raw : DEFAULT_PROVIDER;
+    raw === 'auto' || raw === 'openrouter-sonnet' || raw === 'openrouter-haiku' || raw === 'groq-llama'
+      ? raw
+      : DEFAULT_PROVIDER;
   return cached;
 }
 
diff --git a/backend/server/api/coach/sos-stream.get.ts b/backend/server/api/coach/sos-stream.get.ts
index 8dad30f..94f94ef 100644
--- a/backend/server/api/coach/sos-stream.get.ts
+++ b/backend/server/api/coach/sos-stream.get.ts
@@ -152,7 +152,17 @@ export default defineEventHandler(async (event) => {
   // LLM-Routing: client schickt llmProvider via /sos-session-Body (Toggle).
   // Default openrouter-sonnet. sort:latency bei Anthropic über OR spart 30-58% TTFB
   // (server-curl-bench gemessen). Groq bypasst OpenRouter-Hop für ~157ms TTFB.
-  const llmProvider = sessionData.llmProvider ?? "openrouter-sonnet";
+  // Tier-based LLM: Pro=Groq (sachlich+schnell), Legend=Haiku 4.5 (warm+fast),
+  // Free=Groq (kostenkontrolle). User kann via Toggle override (debug);
+  // 'auto' (oder undefined) → plan-based default.
+  const userToggle = sessionData.llmProvider;
+  let llmProvider: string;
+  if (userToggle && userToggle !== "auto") {
+    llmProvider = userToggle;
+  } else {
+    const plan = ((profile as any)?.plan ?? "free").toLowerCase();
+    llmProvider = plan === "legend" ? "openrouter-haiku" : "groq-llama";
+  }
   let upstreamUrl: string;
   let upstreamKey: string | undefined;
   let upstreamModel: string;