diff --git a/gptc/compiler.py b/gptc/compiler.py
index c299a4b..130f79b 100755
--- a/gptc/compiler.py
+++ b/gptc/compiler.py
@@ -2,32 +2,14 @@
 
 import gptc.tokenizer
 import gptc.model
-from typing import Iterable, Mapping, List, Dict, Union
+from typing import Iterable, Mapping, List, Dict, Union, Tuple
 
 
-def compile(
+def _count_words(
     raw_model: Iterable[Mapping[str, str]],
-    max_ngram_length: int = 1,
-    min_count: int = 1,
-    hash_algorithm: str = "sha256",
-) -> gptc.model.Model:
-    """Compile a raw model.
-
-    Parameters
-    ----------
-    raw_model : list of dict
-        A raw GPTC model.
-
-    max_ngram_length : int
-        Maximum ngram lenght to compile with.
-
-    Returns
-    -------
-    dict
-        A compiled GPTC model.
-
-    """
-
+    max_ngram_length: int,
+    hash_algorithm: str,
+) -> Tuple[Dict[int, Dict[str, int]], Dict[str, int], List[str]]:
     word_counts: Dict[int, Dict[str, int]] = {}
     category_lengths: Dict[str, int] = {}
     names: List[str] = []
@@ -55,6 +37,15 @@ def compile(
             else:
                 word_counts[word] = {category: 1}
 
+    return word_counts, category_lengths, names
+
+
+def _get_weights(
+    min_count: int,
+    word_counts: Dict[int, Dict[str, int]],
+    category_lengths: Dict[str, int],
+    names: List[str],
+) -> Dict[int, List[int]]:
     model: Dict[int, List[int]] = {}
     for word, counts in word_counts.items():
         if sum(counts.values()) >= min_count:
@@ -69,5 +60,33 @@ def compile(
                     round((weights.get(category, 0) / total) * 65535)
                 )
             model[word] = new_weights
+    return model
 
+
+def compile(
+    raw_model: Iterable[Mapping[str, str]],
+    max_ngram_length: int = 1,
+    min_count: int = 1,
+    hash_algorithm: str = "sha256",
+) -> gptc.model.Model:
+    """Compile a raw model.
+
+    Parameters
+    ----------
+    raw_model : list of dict
+        A raw GPTC model.
+
+    max_ngram_length : int
+        Maximum ngram lenght to compile with.
+
+    Returns
+    -------
+    dict
+        A compiled GPTC model.
+
+    """
+    word_counts, category_lengths, names = _count_words(
+        raw_model, max_ngram_length, hash_algorithm
+    )
+    model = _get_weights(min_count, word_counts, category_lengths, names)
     return gptc.model.Model(model, names, max_ngram_length, hash_algorithm)