diff --git a/vectordb_bench/backend/clients/vectorchord/cli.py b/vectordb_bench/backend/clients/vectorchord/cli.py
index 2b3e3862b..99723959c 100644
--- a/vectordb_bench/backend/clients/vectorchord/cli.py
+++ b/vectordb_bench/backend/clients/vectorchord/cli.py
@@ -14,6 +14,16 @@
 )
 
 
+def _parse_int_list(_ctx: click.Context, _param: click.Parameter, value: str | None) -> list[int] | None:
+    if value is None or value == "":
+        return None
+    try:
+        return [int(v.strip()) for v in value.split(",") if v.strip()]
+    except ValueError as e:
+        msg = f"expected comma-separated integers, got {value!r}"
+        raise click.BadParameter(msg) from e
+
+
 class VectorChordTypedDict(CommonTypedDict):
     user_name: Annotated[
         str,
@@ -66,20 +76,25 @@ class VectorChordTypedDict(CommonTypedDict):
 
 class VectorChordRQTypedDict(VectorChordTypedDict):
     lists: Annotated[
-        int | None,
+        list[int] | None,
         click.option(
             "--lists",
-            type=int,
-            help="Number of IVF lists for vchordrq index",
+            type=str,
+            callback=_parse_int_list,
+            help=(
+                "Comma-separated IVF list sizes for vchordrq index. "
+                "Single value for single-level (e.g. '1000') or multiple for multi-level IVF (e.g. '4096,128')"
+            ),
         ),
     ]
     probes: Annotated[
-        int | None,
+        list[int] | None,
         click.option(
             "--probes",
-            type=int,
-            help="Number of probes during search",
-            default=10,
+            type=str,
+            callback=_parse_int_list,
+            help="Comma-separated probes per IVF level during search (e.g. '10' or '10,1')",
+            default="10",
             show_default=True,
         ),
     ]
diff --git a/vectordb_bench/backend/clients/vectorchord/config.py b/vectordb_bench/backend/clients/vectorchord/config.py
index 95916eb06..1c9d97a01 100644
--- a/vectordb_bench/backend/clients/vectorchord/config.py
+++ b/vectordb_bench/backend/clients/vectorchord/config.py
@@ -94,13 +94,13 @@ class VectorChordRQConfig(VectorChordIndexConfig):
     rerank_in_table: bool = False
     degree_of_parallelism: int | None = None  # default 32, range [1, 256]
     # Build parameters ([build.internal] section)
-    lists: int | None = None
+    lists: list[int] | None = None  # e.g. [1000] for single-level or [4096, 128] for multi-level IVF
     spherical_centroids: bool = False
     build_threads: int | None = None  # range [1, 255]
     # PostgreSQL tuning parameter
     max_parallel_workers: int | None = None  # sets max_parallel_workers & max_parallel_maintenance_workers
     # Search parameters (GUCs)
-    probes: int | None = 10
+    probes: list[int] | None = [10]  # one probe per IVF level, e.g. [10] or [10, 1]
     epsilon: float | None = 1.9  # range [0.0, 4.0]
     max_scan_tuples: int | None = None  # default -1, range [-1, 2147483647]
 
@@ -114,7 +114,7 @@ def index_param(self) -> dict:
             options_parts.append(f"degree_of_parallelism = {self.degree_of_parallelism}")
         options_parts.append("[build.internal]")
         if self.lists is not None:
-            options_parts.append(f"lists = [{self.lists}]")
+            options_parts.append(f"lists = [{', '.join(str(v) for v in self.lists)}]")
         if self.spherical_centroids:
             options_parts.append("spherical_centroids = true")
         if self.build_threads is not None:
@@ -136,7 +136,7 @@ def search_param(self) -> dict:
     def session_param(self) -> dict:
         params = {}
         if self.probes is not None:
-            params["vchordrq.probes"] = str(self.probes)
+            params["vchordrq.probes"] = ",".join(str(v) for v in self.probes)
         if self.epsilon is not None:
             params["vchordrq.epsilon"] = str(self.epsilon)
         if self.max_scan_tuples is not None: