diff --git a/tests/unit/test_algorithm.py b/tests/unit/test_algorithm.py
index d367819f..07ac0d49 100644
--- a/tests/unit/test_algorithm.py
+++ b/tests/unit/test_algorithm.py
@@ -10,7 +10,6 @@ os.environ["UPSTREAM_API_KEY"] = "test"
 from routstr.algorithm import (  # noqa: E402
     calculate_model_cost_score,
     get_provider_penalty,
-    should_prefer_model,
 )
 from routstr.payment.models import Architecture, Model, Pricing  # noqa: E402
 
@@ -101,99 +100,3 @@ def test_get_provider_penalty_openrouter() -> None:
     penalty = get_provider_penalty(provider)
     assert penalty == 1.001
 
-
-def test_should_prefer_model_cheaper_wins() -> None:
-    """Test that cheaper model is preferred."""
-    cheap_model = create_test_model("cheap", prompt_price=0.001, completion_price=0.002)
-    expensive_model = create_test_model(
-        "expensive", prompt_price=0.03, completion_price=0.06
-    )
-
-    provider1 = create_test_provider("provider1")
-    provider2 = create_test_provider("provider2")
-
-    # Cheaper model should win
-    assert should_prefer_model(
-        cheap_model, provider1, expensive_model, provider2, "test-alias"
-    )
-
-    # More expensive model should not win
-    assert not should_prefer_model(
-        expensive_model, provider2, cheap_model, provider1, "test-alias"
-    )
-
-
-def test_should_prefer_model_exact_match_wins() -> None:
-    """Test that exact alias match beats cheaper price."""
-    # Make model IDs match the alias differently
-    exact_match = create_test_model(
-        "test-model", prompt_price=0.03, completion_price=0.06
-    )
-    no_match = create_test_model(
-        "other-model", prompt_price=0.001, completion_price=0.002
-    )
-
-    provider1 = create_test_provider("provider1")
-    provider2 = create_test_provider("provider2")
-
-    # Exact match should win even though it's more expensive
-    assert should_prefer_model(
-        exact_match, provider1, no_match, provider2, "test-model"
-    )
-
-
-def test_should_prefer_model_openrouter_slight_penalty() -> None:
-    """Test that OpenRouter has slight penalty compared to other providers."""
-    model1 = create_test_model("model1", prompt_price=0.001, completion_price=0.002)
-    model2 = create_test_model("model2", prompt_price=0.001, completion_price=0.002)
-
-    regular_provider = create_test_provider("regular", "http://provider.com")
-    openrouter_provider = create_test_provider(
-        "openrouter", "https://openrouter.ai/api/v1"
-    )
-
-    # Regular provider should be preferred over OpenRouter at same cost
-    assert should_prefer_model(
-        model1, regular_provider, model2, openrouter_provider, "test-alias"
-    )
-
-    # OpenRouter should not replace regular provider at same cost
-    assert not should_prefer_model(
-        model2, openrouter_provider, model1, regular_provider, "test-alias"
-    )
-
-
-def test_should_prefer_model_openrouter_can_win_if_cheaper() -> None:
-    """Test that OpenRouter can still win if significantly cheaper."""
-    cheap_model = create_test_model(
-        "cheap", prompt_price=0.0001, completion_price=0.0002
-    )
-    expensive_model = create_test_model(
-        "expensive", prompt_price=0.03, completion_price=0.06
-    )
-
-    regular_provider = create_test_provider("regular", "http://provider.com")
-    openrouter_provider = create_test_provider(
-        "openrouter", "https://openrouter.ai/api/v1"
-    )
-
-    # OpenRouter should win if it's much cheaper (even with penalty)
-    assert should_prefer_model(
-        cheap_model,
-        openrouter_provider,
-        expensive_model,
-        regular_provider,
-        "test-alias",
-    )
-
-
-def test_should_prefer_model_same_cost_first_wins() -> None:
-    """Test that when costs are identical, current model is kept."""
-    model1 = create_test_model("model1", prompt_price=0.001, completion_price=0.002)
-    model2 = create_test_model("model2", prompt_price=0.001, completion_price=0.002)
-
-    provider1 = create_test_provider("provider1")
-    provider2 = create_test_provider("provider2")
-
-    # When costs are equal, should not replace
-    assert not should_prefer_model(model2, provider2, model1, provider1, "test-alias")