diff --git a/src/llmflux/cli.py b/src/llmflux/cli.py
index e5175ab..4f80baf 100644
--- a/src/llmflux/cli.py
+++ b/src/llmflux/cli.py
@@ -11,12 +11,21 @@
 import subprocess
 import logging
 from typing import Optional, List, Dict
+from importlib.metadata import PackageNotFoundError, version as pkg_version
 
 from .slurm.runner import SlurmRunner
 from .processors import BatchProcessor
 from .core.config import Config, EngineConfig
 from .benchmark_utils import create_test_prompts_file
 
+
+def _get_llmflux_version() -> str:
+    """Return installed llmflux version (best effort)."""
+    try:
+        return pkg_version("llmflux")
+    except PackageNotFoundError:
+        return "unknown"
+
 def _parse_sbatch_args(sbatch_arg_list: Optional[List[str]]) -> Optional[Dict[str, str]]:
     """Parse --sbatch-arg arguments into a dictionary.
 
@@ -296,6 +305,14 @@ def _run_command(args: argparse.Namespace) -> int:
 
 def build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(prog="llmflux", description="LLMFlux CLI")
+    parser.add_argument(
+        "--version",
+        "-V",
+        "-v",
+        action="version",
+        version=f"%(prog)s {_get_llmflux_version()}",
+        help="Show llmflux version and exit",
+    )
     subparsers = parser.add_subparsers(dest="command", required=True)
 
     # run subcommand
diff --git a/tests/test_cli_version.py b/tests/test_cli_version.py
new file mode 100644
index 0000000..88c2337
--- /dev/null
+++ b/tests/test_cli_version.py
@@ -0,0 +1,24 @@
+import pytest
+
+
+def test_llmflux_version_flag_prints_and_exits(capsys):
+    from llmflux.cli import main
+
+    with pytest.raises(SystemExit) as excinfo:
+        main(["--version"])
+
+    assert excinfo.value.code == 0
+    out = capsys.readouterr().out.strip()
+    assert out.startswith("llmflux ")
+
+
+def test_llmflux_short_version_flag_prints_and_exits(capsys):
+    from llmflux.cli import main
+
+    with pytest.raises(SystemExit) as excinfo:
+        main(["-V"])
+
+    assert excinfo.value.code == 0
+    out = capsys.readouterr().out.strip()
+    assert out.startswith("llmflux ")
+