diff --git a/tests/test_get_model_name.py b/tests/test_get_model_name.py
index ad89f595f..15dd44f0e 100644
--- a/tests/test_get_model_name.py
+++ b/tests/test_get_model_name.py
@@ -64,6 +64,42 @@ class TestGetModelName(unittest.TestCase):
                 "unsloth/Ministral-3-3B-Instruct-2512",
                 True,
             ),
+            (
+                "allenai/Olmo-3-7B-Instruct",
+                True,
+                "unsloth/Olmo-3-7B-Instruct-unsloth-bnb-4bit",
+                True,
+            ),
+            (
+                "allenai/Olmo-3-7B-Instruct",
+                False,
+                "unsloth/Olmo-3-7B-Instruct",
+                True,
+            ),
+            (
+                "allenai/Olmo-3-7B-Think",
+                True,
+                "unsloth/Olmo-3-7B-Think-unsloth-bnb-4bit",
+                True,
+            ),
+            (
+                "allenai/Olmo-3-7B-Think",
+                False,
+                "unsloth/Olmo-3-7B-Think",
+                True,
+            ),
+            (
+                "allenai/Olmo-3-32B-Think",
+                True,
+                "unsloth/Olmo-3-32B-Think-unsloth-bnb-4bit",
+                True,
+            ),
+            (
+                "allenai/Olmo-3-32B-Think",
+                False,
+                "unsloth/Olmo-3-32B-Think",
+                True,
+            ),
             ("unsloth/Kimi-K2-Instruct", True, "unsloth/Kimi-K2-Instruct-BF16", True),
             ("unsloth/Kimi-K2-Instruct", False, "unsloth/Kimi-K2-Instruct", False),
             # Fallback-to-original behavior
@@ -113,6 +149,10 @@ class TestGetModelName(unittest.TestCase):
                 "mistralai/ministral-3-3b-instruct-2512",
                 "unsloth/ministral-3-3b-instruct-2512-unsloth-bnb-4bit",
             ),
+            (
+                "allenai/olmo-3-7b-instruct",
+                "unsloth/olmo-3-7b-instruct-unsloth-bnb-4bit",
+            ),
             ("unsloth/kimi-k2-instruct", "unsloth/kimi-k2-instruct-bf16"),
         ]
         for src, expected in contracts:
diff --git a/unsloth/models/loader.py b/unsloth/models/loader.py
index a66a7c6ab..cd12544ae 100644
--- a/unsloth/models/loader.py
+++ b/unsloth/models/loader.py
@@ -1210,13 +1210,20 @@ class FastModel(FastBaseModel):
             # Granite-4 rms norms are stored as 16 bit, but we upcast
             os.environ["UNSLOTH_HIGH_PRECISION_LAYERNORM"] = "1"
             os.environ["UNSLOTH_DISABLE_STATIC_GENERATION"] = "1"
-        # Olmo 2
+        # OLMo 2
         elif "olmo2" in model_types_all and transformers_version < Version(
             "4.50.0.dev0"
         ):
             raise RuntimeError(
                 "Unsloth: OLMo-2 only works on transformers >= 4.50.0." + NIGHTLY
             )
+        # OLMo 3
+        elif "olmo3" in model_types_all and transformers_version < Version(
+            "4.57.0.dev0"
+        ):
+            raise RuntimeError(
+                "Unsloth: OLMo-3 only works on transformers >= 4.57.0." + LATEST
+            )
         elif "falcon_h1" in model_types_all:
             # Falcon must use float32 Triton ie TRITON_F32_DEFAULT = 'ieee'
             # since Mamba kernels error out on using lower precision
diff --git a/unsloth/models/mapper.py b/unsloth/models/mapper.py
index f0f430eb7..8f2861db6 100644
--- a/unsloth/models/mapper.py
+++ b/unsloth/models/mapper.py
@@ -762,6 +762,18 @@ __INT_TO_FLOAT_MAPPER = \
         "allenai/OLMo-2-0325-32B-Instruct",
         "unsloth/OLMo-2-0325-32B-Instruct-bnb-4bit",
     ),
+    "unsloth/Olmo-3-7B-Instruct-unsloth-bnb-4bit" : (
+        "unsloth/Olmo-3-7B-Instruct",
+        "allenai/Olmo-3-7B-Instruct",
+    ),
+    "unsloth/Olmo-3-7B-Think-unsloth-bnb-4bit" : (
+        "unsloth/Olmo-3-7B-Think",
+        "allenai/Olmo-3-7B-Think",
+    ),
+    "unsloth/Olmo-3-32B-Think-unsloth-bnb-4bit" : (
+        "unsloth/Olmo-3-32B-Think",
+        "allenai/Olmo-3-32B-Think",
+    ),
     "unsloth/Mistral-Small-3.1-24B-Instruct-2503-unsloth-bnb-4bit" : (
         "unsloth/Mistral-Small-3.1-24B-Instruct-2503",
         "mistralai/Mistral-Small-3.1-24B-Instruct-2503",