diff --git a/tools/sprite-generation/tools/advance.py b/tools/sprite-generation/tools/advance.py
index c6b30a3f..d04e552a 100644
--- a/tools/sprite-generation/tools/advance.py
+++ b/tools/sprite-generation/tools/advance.py
@@ -27,6 +27,10 @@ import json
 import os
 import sys
 import time
+
+# Force line-buffered output so progress is visible when stdout is redirected
+if hasattr(sys.stdout, "reconfigure"):
+    sys.stdout.reconfigure(line_buffering=True)
 from concurrent.futures import ProcessPoolExecutor
 from pathlib import Path
 
@@ -215,8 +219,9 @@ async def stage_score(
             tier_summaries.append(_tier_summary(scorer.name, total, 0, 0, 0, 0))
             continue
 
-        # Fire ALL items at once — semaphore in Scorer limits concurrency.
-        # Results stream back via as_completed inside score_batch.
+        # Fire ALL items concurrently — semaphore in Scorer limits actual
+        # concurrency per backend. Results stream back as each completes,
+        # so DB commits happen immediately without waiting for the full batch.
         items: list[tuple[str, dict]] = [
             (v["_score_path"], v) for v in eligible
         ]
@@ -227,16 +232,14 @@ async def stage_score(
         errors = 0
         start = time.time()
 
-        batch_results = await scorer.score_batch(items)
-
-        for idx, result in batch_results:
-            v = eligible[idx]
-            vid = v["id"]
-
-            if result is None:
+        async for idx, result in scorer.score_stream(items):
+            if idx == -1 or result is None:
                 errors += 1
                 continue
 
+            v = eligible[idx]
+            vid = v["id"]
+
             reg.store_score(
                 variant_id=vid,
                 scorer_name=scorer.name,
@@ -437,7 +440,7 @@ def main() -> None:
     parser.add_argument("--score-only", action="store_true",
                         help="Only run scoring (skip reconcile + process)")
     parser.add_argument("--scorers", nargs="+", metavar="SCORER",
-                        choices=["qwen3", "haiku", "opus"],
+                        choices=["qwen3", "haiku", "sonnet", "opus"],
                         help="Only run these scorers (e.g. --scorers qwen3 haiku)")
     parser.add_argument("--rescore", action="store_true",
                         help="Re-score variants that already have a latest score (inserts new rows)")