diff --git a/vllm/entrypoints/openai/api_server.py b/vllm/entrypoints/openai/api_server.py
index 9746d9697a66..af132481b1bd 100644
--- a/vllm/entrypoints/openai/api_server.py
+++ b/vllm/entrypoints/openai/api_server.py
@@ -41,7 +41,8 @@
                                          resolve_mistral_chat_template)
 from vllm.entrypoints.launcher import serve_http
 from vllm.entrypoints.logger import RequestLogger
-from vllm.entrypoints.openai.cli_args import (make_arg_parser,
+from vllm.entrypoints.openai.cli_args import (log_non_default_args,
+                                              make_arg_parser,
                                               validate_parsed_serve_args)
 # yapf conflicts with isort for this block
 # yapf: disable
@@ -1040,7 +1041,7 @@ def create_server_socket(addr: tuple[str, int]) -> socket.socket:
 
 async def run_server(args, **uvicorn_kwargs) -> None:
     logger.info("vLLM API server version %s", VLLM_VERSION)
-    logger.info("args: %s", args)
+    log_non_default_args(args)
 
     if args.tool_parser_plugin and len(args.tool_parser_plugin) > 3:
         ToolParserManager.import_tool_parser(args.tool_parser_plugin)
diff --git a/vllm/entrypoints/openai/cli_args.py b/vllm/entrypoints/openai/cli_args.py
index a2639d374791..d8cec2202134 100644
--- a/vllm/entrypoints/openai/cli_args.py
+++ b/vllm/entrypoints/openai/cli_args.py
@@ -17,8 +17,11 @@
 from vllm.entrypoints.openai.serving_models import (LoRAModulePath,
                                                     PromptAdapterPath)
 from vllm.entrypoints.openai.tool_parsers import ToolParserManager
+from vllm.logger import init_logger
 from vllm.utils import FlexibleArgumentParser
 
+logger = init_logger(__name__)
+
 
 class LoRAParserAction(argparse.Action):
 
@@ -285,6 +288,15 @@ def validate_parsed_serve_args(args: argparse.Namespace):
                         "--tool-call-parser")
 
 
+def log_non_default_args(args: argparse.Namespace):
+    non_default_args = {}
+    parser = make_arg_parser(FlexibleArgumentParser())
+    for arg, default in vars(parser.parse_args([])).items():
+        if default != getattr(args, arg):
+            non_default_args[arg] = getattr(args, arg)
+    logger.info("non-default args: %s", non_default_args)
+
+
 def create_parser_for_docs() -> FlexibleArgumentParser:
     parser_for_docs = FlexibleArgumentParser(
         prog="-m vllm.entrypoints.openai.api_server")