diff --git a/docs/model_integration.rst b/docs/model_integration.rst
index 768e59f3..e19e8b91 100644
--- a/docs/model_integration.rst
+++ b/docs/model_integration.rst
@@ -312,14 +312,6 @@ the |torax.sim.Sim|_ object.
 
 .. code-block:: python
 
-    # in sim.py. Copied here for reference, no need to modify this.
-
-    def build_sim_object(
-        ...
-        transport_model_builder: transport_model_lib.TransportModelBuilder,
-        ...
-    ) -> Sim:
-
     # in your TORAX configuration or run file .py
 
     my_custom_transport_builder = MyCustomTransportModelBuilder()
@@ -334,7 +326,7 @@ the |torax.sim.Sim|_ object.
     my_custom_transport_builder.runtime_params.bar = 4.0
 
     # Build the Sim object.
-    sim_object = sim_lib.build_sim_object(
+    sim_object = sim_lib.Sim.create(
         ...,
         transport_model_builder=my_custom_transport_builder,
         ...
@@ -348,7 +340,7 @@ As of 7 June 2024, you cannot instantiate and configure a custom transport model
 via the config dictionary. You may still configure the other components of your
 TORAX simulation via the config dict and use other functions in
 |torax.config.build_sim|_ to convert those to the objects you can pass into
-``build_sim_object()``. We are working on making this easier, but reach out
+``Sim.create()``. We are working on making this easier, but reach out
 if this is something you need.
 
 
diff --git a/torax/config/build_sim.py b/torax/config/build_sim.py
index f2eb53af..7c9e3902 100644
--- a/torax/config/build_sim.py
+++ b/torax/config/build_sim.py
@@ -270,7 +270,7 @@ def build_sim_from_config(
   else:
     file_restart = None
 
-  return sim_lib.build_sim_object(
+  return sim_lib.Sim.create(
       runtime_params=runtime_params,
       geometry_provider=geo_provider,
       source_models_builder=build_sources_builder_from_config(
diff --git a/torax/sim.py b/torax/sim.py
index 43fbaf37..d02dddc4 100644
--- a/torax/sim.py
+++ b/torax/sim.py
@@ -1042,29 +1042,6 @@ def _override_initial_state_post_processed_outputs_from_file(
   return post_processed_outputs
 
 
-def build_sim_object(
-    runtime_params: general_runtime_params.GeneralRuntimeParams,
-    geometry_provider: geometry_provider_lib.GeometryProvider,
-    stepper_builder: stepper_lib.StepperBuilder,
-    transport_model_builder: transport_model_lib.TransportModelBuilder,
-    source_models_builder: source_models_lib.SourceModelsBuilder,
-    pedestal_model_builder: pedestal_model_lib.PedestalModelBuilder,
-    time_step_calculator: Optional[ts.TimeStepCalculator] = None,
-    file_restart: Optional[general_runtime_params.FileRestart] = None,
-) -> Sim:
-  """Builds a Sim object from the input runtime params and sim components."""
-  return Sim.create(
-      runtime_params=runtime_params,
-      geometry_provider=geometry_provider,
-      stepper_builder=stepper_builder,
-      transport_model_builder=transport_model_builder,
-      source_models_builder=source_models_builder,
-      pedestal_model_builder=pedestal_model_builder,
-      time_step_calculator=time_step_calculator,
-      file_restart=file_restart,
-  )
-
-
 def _run_simulation(
     static_runtime_params_slice: runtime_params_slice.StaticRuntimeParamsSlice,
     dynamic_runtime_params_slice_provider: runtime_params_slice.DynamicRuntimeParamsSliceProvider,
diff --git a/torax/tests/sim.py b/torax/tests/sim.py
index 9eaba011..6cf3cb45 100644
--- a/torax/tests/sim.py
+++ b/torax/tests/sim.py
@@ -481,7 +481,7 @@ def test_no_op(self):
         geometry.build_circular_geometry()
     )
 
-    sim = sim_lib.build_sim_object(
+    sim = sim_lib.Sim.create(
         runtime_params=runtime_params,
         geometry_provider=geo_provider,
         stepper_builder=linear_theta_method.LinearThetaMethodBuilder(),
diff --git a/torax/tests/sim_custom_sources.py b/torax/tests/sim_custom_sources.py
index 654b9434..ffdbdb4e 100644
--- a/torax/tests/sim_custom_sources.py
+++ b/torax/tests/sim_custom_sources.py
@@ -191,7 +191,7 @@ def custom_source_formula(
     geo_provider = geometry_provider.ConstantGeometryProvider(
         geometry.build_circular_geometry()
     )
-    sim = sim_lib.build_sim_object(
+    sim = sim_lib.Sim.create(
         runtime_params=self.test_particle_sources_constant_runtime_params,
         geometry_provider=geo_provider,
         stepper_builder=self.stepper_builder,
diff --git a/torax/tests/sim_time_dependence.py b/torax/tests/sim_time_dependence.py
index 68722112..e6375960 100644
--- a/torax/tests/sim_time_dependence.py
+++ b/torax/tests/sim_time_dependence.py
@@ -77,7 +77,7 @@ def test_time_dependent_params_update_in_adaptive_dt(
     # max combined value of Ti_bound_right should be 2.5. Higher will make the
     # error state from the stepper be 1.
     time_calculator = fixed_time_step_calculator.FixedTimeStepCalculator()
-    sim = sim_lib.build_sim_object(
+    sim = sim_lib.Sim.create(
         runtime_params=runtime_params,
         geometry_provider=geometry_provider,
         stepper_builder=FakeStepperBuilder(
diff --git a/torax/tests/test_data/test_explicit.py b/torax/tests/test_data/test_explicit.py
index 7c805d56..6cd2c320 100644
--- a/torax/tests/test_data/test_explicit.py
+++ b/torax/tests/test_data/test_explicit.py
@@ -106,7 +106,7 @@ def get_sim() -> sim_lib.Sim:
   # config taking place via constructor args in this function.
   runtime_params = get_runtime_params()
   geo_provider = get_geometry_provider()
-  return sim_lib.build_sim_object(
+  return sim_lib.Sim.create(
       runtime_params=runtime_params,
       geometry_provider=geo_provider,
       source_models_builder=get_sources_builder(),