diff --git a/backend/app/api/endpoints/compatibility.py b/backend/app/api/endpoints/compatibility.py
index c3abbdf..9283956 100644
--- a/backend/app/api/endpoints/compatibility.py
+++ b/backend/app/api/endpoints/compatibility.py
@@ -139,7 +139,7 @@ Return ONLY the JSON. Include exactly 5 recommendations."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=1024,
         messages=[{"role": "user", "content": prompt}],
     )
diff --git a/backend/app/api/endpoints/playlist_fix.py b/backend/app/api/endpoints/playlist_fix.py
index fa48595..1771adb 100644
--- a/backend/app/api/endpoints/playlist_fix.py
+++ b/backend/app/api/endpoints/playlist_fix.py
@@ -109,7 +109,7 @@ Return ONLY the JSON object."""
     # Call Claude API
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=2000,
         messages=[{"role": "user", "content": prompt}],
     )
diff --git a/backend/app/api/endpoints/recommendations.py b/backend/app/api/endpoints/recommendations.py
index ea5d42d..760a7d0 100644
--- a/backend/app/api/endpoints/recommendations.py
+++ b/backend/app/api/endpoints/recommendations.py
@@ -127,7 +127,7 @@ Return ONLY the JSON object."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=2000,
         messages=[{"role": "user", "content": prompt}],
     )
@@ -217,7 +217,7 @@ Return ONLY the JSON object."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=2000,
         messages=[{"role": "user", "content": prompt}],
     )
@@ -313,7 +313,7 @@ Return ONLY the JSON object."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=4000,
         messages=[{"role": "user", "content": prompt}],
     )
@@ -431,7 +431,7 @@ Only recommend real songs. Return ONLY the JSON array."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=4000,
         messages=[{"role": "user", "content": prompt}],
     )
@@ -565,7 +565,7 @@ Only use real songs. Return ONLY the JSON."""
 
     client = anthropic.Anthropic(api_key=settings.ANTHROPIC_API_KEY)
     message = client.messages.create(
-        model="claude-sonnet-4-20250514",
+        model="claude-haiku-4-5-20251001",
         max_tokens=4000,
         messages=[{"role": "user", "content": prompt}],
     )
diff --git a/backend/app/api/endpoints/timeline.py b/backend/app/api/endpoints/timeline.py
index 6e66e0c..50cc0da 100644
--- a/backend/app/api/endpoints/timeline.py
+++ b/backend/app/api/endpoints/timeline.py
@@ -101,7 +101,7 @@ Return ONLY a valid JSON object with "decades" and "insight" keys. No other text
 
     try:
         message = await client.messages.create(
-            model="claude-sonnet-4-20250514",
+            model="claude-haiku-4-5-20251001",
             max_tokens=1024,
             messages=[{"role": "user", "content": prompt}],
         )