diff --git a/python/sglang/bench_server_latency.py b/python/sglang/bench_server_latency.py
index 6bbb3954b..66e59d0d4 100644
--- a/python/sglang/bench_server_latency.py
+++ b/python/sglang/bench_server_latency.py
@@ -6,6 +6,8 @@ It accepts arguments similar to those of launch_server.py.
 Usage:
 
 python3 -m sglang.bench_server_latency --model meta-llama/Meta-Llama-3.1-8B --batch-size 1 16 64 --input-len 1024 --output-len 8
+
+python3 -m sglang.bench_server_latency --model None --base-url http://localhost:30000 --batch-size 16 --input-len 1024 --output-len 8
 """
 
 import argparse
@@ -15,7 +17,7 @@ import json
 import multiprocessing
 import os
 import time
-from typing import Tuple
+from typing import Optional, Tuple
 
 import numpy as np
 import requests
@@ -32,6 +34,8 @@ class BenchArgs:
     input_len: Tuple[int] = (1024,)
     output_len: Tuple[int] = (16,)
     result_filename: str = "result.jsonl"
+    base_url: str = ""
+    skip_warmup: bool = False
 
     @staticmethod
     def add_cli_args(parser: argparse.ArgumentParser):
@@ -48,6 +52,8 @@ class BenchArgs:
         parser.add_argument(
             "--result-filename", type=str, default=BenchArgs.result_filename
         )
+        parser.add_argument("--base-url", type=str, default=BenchArgs.base_url)
+        parser.add_argument("--skip-warmup", action="store_true")
 
     @classmethod
     def from_cli_args(cls, args: argparse.Namespace):
@@ -139,17 +145,21 @@ def run_one_case(
 
 
 def run_benchmark(server_args: ServerArgs, bench_args: BenchArgs):
-    proc, base_url = launch_server_process(server_args)
+    if bench_args.base_url:
+        proc, base_url = None, bench_args.base_url
+    else:
+        proc, base_url = launch_server_process(server_args)
 
     # warmup
-    run_one_case(
-        base_url,
-        batch_size=16,
-        input_len=1024,
-        output_len=16,
-        run_name="",
-        result_filename="",
-    )
+    if not bench_args.skip_warmup:
+        run_one_case(
+            base_url,
+            batch_size=16,
+            input_len=1024,
+            output_len=16,
+            run_name="",
+            result_filename="",
+        )
 
     # benchmark
     try:
@@ -165,7 +175,8 @@ def run_benchmark(server_args: ServerArgs, bench_args: BenchArgs):
                 bench_args.result_filename,
             )
     finally:
-        kill_child_process(proc.pid)
+        if proc:
+            kill_child_process(proc.pid)
 
     print(f"\nResults are saved to {bench_args.result_filename}")
 
diff --git a/python/sglang/bench_serving.py b/python/sglang/bench_serving.py
index 2f07973b8..2ca35aca9 100644
--- a/python/sglang/bench_serving.py
+++ b/python/sglang/bench_serving.py
@@ -222,6 +222,85 @@ async def async_request_openai_completions(
     return output
 
 
+async def async_request_sglang_generate(
+    request_func_input: RequestFuncInput,
+    pbar: Optional[tqdm] = None,
+) -> RequestFuncOutput:
+    api_url = request_func_input.api_url
+    prompt = request_func_input.prompt
+
+    async with aiohttp.ClientSession(timeout=AIOHTTP_TIMEOUT) as session:
+        payload = {
+            "text": prompt,
+            "sampling_params": {
+                "temperature": 0.0,
+                "max_new_tokens": request_func_input.output_len,
+                "ignore_eos": not args.disable_ignore_eos,
+            },
+            "stream": not args.disable_stream,
+            **request_func_input.extra_request_body,
+        }
+        headers = {}
+
+        output = RequestFuncOutput()
+        output.prompt_len = request_func_input.prompt_len
+
+        generated_text = ""
+        ttft = 0.0
+        st = time.perf_counter()
+        most_recent_timestamp = st
+        try:
+            async with session.post(
+                url=api_url, json=payload, headers=headers
+            ) as response:
+                if response.status == 200:
+                    async for chunk_bytes in response.content:
+                        chunk_bytes = chunk_bytes.strip()
+                        if not chunk_bytes:
+                            continue
+                        # print(chunk_bytes)
+
+                        chunk = remove_prefix(chunk_bytes.decode("utf-8"), "data: ")
+                        latency = time.perf_counter() - st
+                        if chunk == "[DONE]":
+                            pass
+                        else:
+                            data = json.loads(chunk)
+
+                            # NOTE: Some completion API might have a last
+                            # usage summary response without a token so we
+                            # want to check a token was generated
+                            if data["text"]:
+                                timestamp = time.perf_counter()
+                                # First token
+                                if ttft == 0.0:
+                                    ttft = time.perf_counter() - st
+                                    output.ttft = ttft
+
+                                # Decoding phase
+                                else:
+                                    output.itl.append(timestamp - most_recent_timestamp)
+
+                                most_recent_timestamp = timestamp
+                                generated_text = data["text"]
+
+                    output.generated_text = generated_text
+                    output.success = True
+                    output.latency = latency
+                    output.output_len = request_func_input.output_len
+                else:
+                    output.error = response.reason or ""
+                    output.success = False
+        except Exception:
+            output.success = False
+            exc_info = sys.exc_info()
+            output.error = "".join(traceback.format_exception(*exc_info))
+
+    if pbar:
+        pbar.update(1)
+    return output
+
+
 async def async_request_gserver(
     request_func_input: RequestFuncInput,
     pbar: Optional[tqdm] = None,
@@ -264,7 +343,9 @@ def get_tokenizer(
 
 
 ASYNC_REQUEST_FUNCS = {
-    "sglang": async_request_openai_completions,
+    "sglang": async_request_sglang_generate,
+    "sglang-native": async_request_sglang_generate,
+    "sglang-oai": async_request_openai_completions,
     "vllm": async_request_openai_completions,
     "lmdeploy": async_request_openai_completions,
     "trt": async_request_trt_llm,
@@ -387,6 +468,8 @@ def sample_sharegpt_requests(
             continue
         filtered_dataset.append((prompt, prompt_len, output_len))
 
+    print(f"#Input tokens: {np.sum([x[1] for x in filtered_dataset])}")
+    print(f"#Output tokens: {np.sum([x[2] for x in filtered_dataset])}")
     return filtered_dataset
 
 
@@ -784,24 +867,33 @@ def run_benchmark(args_: argparse.Namespace):
     if args.port is None:
         args.port = {
             "sglang": 30000,
+            "sglang-native": 30000,
+            "sglang-oai": 30000,
             "lmdeploy": 23333,
             "vllm": 8000,
             "trt": 8000,
             "gserver": 9988,
         }.get(args.backend, 30000)
 
-    api_url = (
-        f"{args.base_url}/v1/completions"
-        if args.base_url
-        else f"http://{args.host}:{args.port}/v1/completions"
-    )
     model_url = (
         f"{args.base_url}/v1/models"
         if args.base_url
         else f"http://{args.host}:{args.port}/v1/models"
     )
 
-    if args.backend == "trt":
+    if args.backend in ["sglang", "sglang-native"]:
+        api_url = (
+            f"{args.base_url}/generate"
+            if args.base_url
+            else f"http://{args.host}:{args.port}/generate"
+        )
+    elif args.backend in ["sglang-oai", "vllm", "lmdeploy"]:
+        api_url = (
+            f"{args.base_url}/v1/completions"
+            if args.base_url
+            else f"http://{args.host}:{args.port}/v1/completions"
+        )
+    elif args.backend == "trt":
         api_url = (
             f"{args.base_url}/v2/models/ensemble/generate_stream"
             if args.base_url