diff --git a/tools/benchmark_log_summary.py b/tools/benchmark_log_summary.py
new file mode 100644
index 0000000..9d04f13
--- /dev/null
+++ b/tools/benchmark_log_summary.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""Parse benchmark or distributed-test logs into a compact JSON summary."""
+
+from __future__ import annotations
+
+
+import argparse
+import json
+import re
+import sys
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+
+METRIC_RE = re.compile(
+    r"(?P<name>[A-Za-z0-9_./-]+).*?(?P<latency>[0-9.]+)\s*(?:us|ms)",
+    re.IGNORECASE,
+)
+ERROR_RE = re.compile(
+    r"(error|failed|timeout|traceback|segmentation fault|core dumped)",
+    re.IGNORECASE,
+)
+
+
+def parse_log(path: Path) -> dict[str, object]:
+    metrics: list[dict[str, object]] = []
+    errors: list[dict[str, object]] = []
+    with path.open(encoding="utf-8", errors="replace") as handle:
+        for lineno, line in enumerate(handle, start=1):
+            match = METRIC_RE.search(line)
+            if match:
+                item = {"line": lineno, "text": line.strip()}
+                item.update(
+                    {k: v for k, v in match.groupdict().items() if v is not None}
+                )
+                metrics.append(item)
+            if ERROR_RE.search(line):
+                errors.append({"line": lineno, "text": line.strip()})
+    return {
+        "path": str(path),
+        "metrics": metrics,
+        "errors": errors,
+        "metric_count": len(metrics),
+        "error_count": len(errors),
+    }
+
+
+def self_test() -> None:
+    with TemporaryDirectory() as tmp_dir:
+        sample = Path(tmp_dir) / "sample_log_for_parser.txt"
+        sample.write_text(
+            "all_reduce size 1024 algbw 11.5 busbw 10.1 latency 2.5 ms "
+            "throughput 33.0 tokens/s 12.0 GB/s\nERROR timeout\n",
+            encoding="utf-8",
+        )
+        data = parse_log(sample)
+    if data["metric_count"] < 1 or data["error_count"] != 1:
+        raise RuntimeError(f"self-test failed: {data}")
+    print(
+        json.dumps(
+            {"ok": True, "metric_count": data["metric_count"]}, ensure_ascii=False
+        )
+    )
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("logs", nargs="*", help="Log files to parse.")
+    parser.add_argument("--self-test", action="store_true")
+    args = parser.parse_args()
+    if args.self_test:
+        self_test()
+        return 0
+    results = []
+    for p in args.logs:
+        path = Path(p)
+        if not path.is_file():
+            print(f"Error: log file does not exist or is not a file: {p}", file=sys.stderr)
+            return 2
+        results.append(parse_log(path))
+    print(json.dumps(results, ensure_ascii=False, indent=2))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())