diff --git a/runs/frontier-multicase-sufficiency-v0/best_effort/fixed_cohort_rank.py b/runs/frontier-multicase-sufficiency-v0/best_effort/fixed_cohort_rank.py
index cb97cf0..4206272 100644
--- a/runs/frontier-multicase-sufficiency-v0/best_effort/fixed_cohort_rank.py
+++ b/runs/frontier-multicase-sufficiency-v0/best_effort/fixed_cohort_rank.py
@@ -21,6 +21,7 @@ import statistics
 import subprocess
 import sys
 import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
 from dataclasses import asdict, replace
 from pathlib import Path
 from typing import Any, Iterable
@@ -525,7 +526,7 @@ def run_frontier_load(
         config=config,
         probe_dir=load_dir,
         run_id=f"{config.name}_{rate_key(rate)}",
-        cache_root=args.output_root / "cache",
+        cache_root=args.output_root / "cache" / config.name,
     )
     write_json(load_dir / "command.json", command)
     environment = os.environ.copy()
@@ -652,15 +653,20 @@ def run_frontier(args: argparse.Namespace) -> Path:
             "end_to_end_action_specific_calibration": False,
             "real_serving_results_observed_before_freeze": False,
         },
+        "orchestration": {
+            "max_parallel_configs": args.max_parallel_configs,
+            "cache_isolation": "one_cache_root_per_config",
+            "loads_within_config": "sequential",
+        },
         "configs": [asdict(config) | {"name": config.name} for config in configs],
     }
     write_json(args.output_root / "run_manifest.json", run_manifest)
 
-    config_results = []
     rate_records = sorted(
         protocol["rates"].values(), key=lambda item: item["offered_request_rate"]
     )
-    for config in configs:
+
+    def run_config(config: Any) -> dict[str, Any]:
         loads = []
         for record in rate_records:
             result = run_frontier_load(
@@ -686,7 +692,15 @@ def run_frontier(args: argparse.Namespace) -> Path:
             )
         summary = {"config": asdict(config) | {"name": config.name}, "loads": loads}
         write_json(args.output_root / "results" / f"{config.name}.json", summary)
-        config_results.append(summary)
+        return summary
+
+    results_by_name = {}
+    with ThreadPoolExecutor(max_workers=args.max_parallel_configs) as pool:
+        futures = {pool.submit(run_config, config): config for config in configs}
+        for future in as_completed(futures):
+            config = futures[future]
+            results_by_name[config.name] = future.result()
+    config_results = [results_by_name[config.name] for config in configs]
     freeze = {
         "schema": FRONTIER_SCHEMA,
         "status": "frozen_before_community_run",
@@ -1370,6 +1384,7 @@ def parse_args() -> argparse.Namespace:
     frontier.add_argument("--tp4-capacity-artifact", type=Path, required=True)
     frontier.add_argument("--tp8-capacity-artifact", type=Path, required=True)
     frontier.add_argument("--cache-equivalence-artifact", type=Path, required=True)
+    frontier.add_argument("--max-parallel-configs", type=int, default=1)
     frontier.add_argument("--config", action="append")
 
     community = subparsers.add_parser("prepare-community")