diff --git a/.ci/scripts/gather_test_models.py b/.ci/scripts/gather_test_models.py
index b32a052026a..3f22d7699de 100755
--- a/.ci/scripts/gather_test_models.py
+++ b/.ci/scripts/gather_test_models.py
@@ -33,7 +33,7 @@
         "dl3": "linux.4xlarge.memory",
         "emformer_join": "linux.4xlarge.memory",
         "emformer_predict": "linux.4xlarge.memory",
-        "phi-4-mini": "linux.4xlarge.memory",
+        "phi_4_mini": "linux.4xlarge.memory",
     }
 }
 
diff --git a/.ci/scripts/test_model.sh b/.ci/scripts/test_model.sh
index 51e81e62a9f..cd543ff1424 100755
--- a/.ci/scripts/test_model.sh
+++ b/.ci/scripts/test_model.sh
@@ -100,11 +100,11 @@ test_model() {
       rm "./${MODEL_NAME}.pte"
       return  # Skip running with portable executor runnner since portable doesn't support Qwen's biased linears.
   fi
-  if [[ "${MODEL_NAME}" == "phi-4-mini" ]]; then
+  if [[ "${MODEL_NAME}" == "phi_4_mini" ]]; then
       # Install requirements for export_llama
       bash examples/models/llama/install_requirements.sh
       # Test export_llama script: python3 -m examples.models.llama.export_llama.
-      "${PYTHON_EXECUTABLE}" -m examples.models.llama.export_llama --model "${MODEL_NAME}" -c examples/models/llama/params/demo_rand_params.pth -p examples/models/phi-4-mini/config.json
+      "${PYTHON_EXECUTABLE}" -m examples.models.llama.export_llama --model "${MODEL_NAME}" -c examples/models/llama/params/demo_rand_params.pth -p examples/models/phi_4_mini/config.json
       run_portable_executor_runner
       rm "./${MODEL_NAME}.pte"
       return
diff --git a/.github/workflows/pull.yml b/.github/workflows/pull.yml
index 81948e4e827..9a2221b3aac 100644
--- a/.github/workflows/pull.yml
+++ b/.github/workflows/pull.yml
@@ -106,7 +106,7 @@ jobs:
           - model: emformer_join
             backend: xnnpack-quantization-delegation
             runner: linux.4xlarge.memory
-          - model: phi-4-mini
+          - model: phi_4_mini
             backend: portable
             runner: linux.4xlarge.memory
           - model: llama3_2_vision_encoder
diff --git a/.github/workflows/trunk.yml b/.github/workflows/trunk.yml
index ecae932b74f..829d8fd88f4 100644
--- a/.github/workflows/trunk.yml
+++ b/.github/workflows/trunk.yml
@@ -72,7 +72,7 @@ jobs:
             backend: portable
           - model: softmax
             backend: portable
-          - model: phi-4-mini
+          - model: phi_4_mini
             backend: portable
           - model: qwen2_5
             backend: portable
diff --git a/examples/models/__init__.py b/examples/models/__init__.py
index 80ba6801a6c..41ec5c3aac6 100644
--- a/examples/models/__init__.py
+++ b/examples/models/__init__.py
@@ -36,7 +36,7 @@ class Model(str, Enum):
     Llava = "llava"
     EfficientSam = "efficient_sam"
     Qwen25 = "qwen2_5"
-    Phi4Mini = "phi-4-mini"
+    Phi4Mini = "phi_4_mini"
 
     def __str__(self) -> str:
         return self.value
@@ -80,7 +80,7 @@ def __str__(self) -> str:
     str(Model.Llava): ("llava", "LlavaModel"),
     str(Model.EfficientSam): ("efficient_sam", "EfficientSAM"),
     str(Model.Qwen25): ("qwen2_5", "Qwen2_5Model"),
-    str(Model.Phi4Mini): ("phi-4-mini", "Phi4MiniModel"),
+    str(Model.Phi4Mini): ("phi_4_mini", "Phi4MiniModel"),
 }
 
 __all__ = [
diff --git a/examples/models/llama/export_llama_lib.py b/examples/models/llama/export_llama_lib.py
index 1620924f4f6..c7603108ccf 100644
--- a/examples/models/llama/export_llama_lib.py
+++ b/examples/models/llama/export_llama_lib.py
@@ -95,7 +95,7 @@
     "llama3_2",
     "static_llama",
     "qwen2_5",
-    "phi-4-mini",
+    "phi_4_mini",
     "smollm2",
 ]
 TORCHTUNE_DEFINED_MODELS = ["llama3_2_vision"]
diff --git a/examples/models/phi-4-mini/README.md b/examples/models/phi_4_mini/README.md
similarity index 100%
rename from examples/models/phi-4-mini/README.md
rename to examples/models/phi_4_mini/README.md
diff --git a/examples/models/phi-4-mini/__init__.py b/examples/models/phi_4_mini/__init__.py
similarity index 100%
rename from examples/models/phi-4-mini/__init__.py
rename to examples/models/phi_4_mini/__init__.py
diff --git a/examples/models/phi-4-mini/config.json b/examples/models/phi_4_mini/config.json
similarity index 100%
rename from examples/models/phi-4-mini/config.json
rename to examples/models/phi_4_mini/config.json
diff --git a/examples/models/phi-4-mini/convert_weights.py b/examples/models/phi_4_mini/convert_weights.py
similarity index 100%
rename from examples/models/phi-4-mini/convert_weights.py
rename to examples/models/phi_4_mini/convert_weights.py