diff --git a/python/sglang/srt/entrypoints/openai/serving_chat.py b/python/sglang/srt/entrypoints/openai/serving_chat.py
index 2f4c6c394..7913af172 100644
--- a/python/sglang/srt/entrypoints/openai/serving_chat.py
+++ b/python/sglang/srt/entrypoints/openai/serving_chat.py
@@ -1240,7 +1240,7 @@ class OpenAIServingChat(OpenAIServingBase):
                 not request.chat_template_kwargs
                 or request.chat_template_kwargs.get("thinking") is not False
             )
-        if self.reasoning_parser in ["qwen3", "glm45", "nano_v3", "interns1"]:
+        if self.reasoning_parser in ["qwen3", "glm45", "nemotron_3", "interns1"]:
             # Models that thinking by default, and can be disabled by setting enable_thinking=False
             return (
                 not request.chat_template_kwargs
diff --git a/python/sglang/srt/parser/reasoning_parser.py b/python/sglang/srt/parser/reasoning_parser.py
index a85bbb440..7eef5c0fb 100644
--- a/python/sglang/srt/parser/reasoning_parser.py
+++ b/python/sglang/srt/parser/reasoning_parser.py
@@ -418,9 +418,9 @@ class MiniMaxAppendThinkDetector(BaseReasoningFormatDetector):
         return StreamingParseResult(normal_text=self.think_start_token + text)
 
 
-class NanoV3Detector(BaseReasoningFormatDetector):
+class Nemotron3Detector(BaseReasoningFormatDetector):
     """
-    Detector for NanoV3 model.
+    Detector for Nemotron3 model.
     Uses the same reasoning format as DeepSeek-R1: (<think>)*(.*)</think>
 
     """
@@ -466,7 +466,7 @@ class ReasoningParser:
         "minimax-append-think": MiniMaxAppendThinkDetector,
         "step3": DeepSeekR1Detector,
         "step3p5": DeepSeekR1Detector,
-        "nano_v3": NanoV3Detector,
+        "nemotron_3": Nemotron3Detector,
         "interns1": Qwen3Detector,
     }