[model] support for microsoft's Phi-4-mini (#9734)

src/llamafactory/data/template.py

@@ -1910,6 +1910,17 @@ register_template(
 )
 
 
+register_template(
+    name="phi4_mini",
+    format_user=StringFormatter(slots=["<|user|>{{content}}<|end|><|assistant|>"]),
+    format_assistant=StringFormatter(slots=["{{content}}<|end|>"]),
+    format_system=StringFormatter(slots=["<|system|>{{content}}<|end|>"]),
+    format_tools=StringFormatter(slots=["<|tool|>{{content}}<|/tool|>"]),
+    stop_words=["<|end|>"],
+    replace_eos=True,
+)
+
+
 # copied from ministral template
 register_template(
     name="pixtral",

src/llamafactory/extras/constants.py

@@ -2443,6 +2443,15 @@ register_model_group(
     template="phi4",
 )
 
+register_model_group(
+    models={
+        "Phi-4-3.8B-instruct": {
+            DownloadSource.DEFAULT: "microsoft/Phi-4-mini-instruct",
+            DownloadSource.MODELSCOPE: "LLM-Research/Phi-4-mini-instruct",
+        },
+    },
+    template="phi4_mini",
+)
 
 register_model_group(
     models={