diff --git a/arkindex/process/api.py b/arkindex/process/api.py
index 7b0d2cc1f66cf5f897a1ba5ed7926f1408aaa132..fab6dceb5743f97cb72284080c2b96a170b18d8d 100644
--- a/arkindex/process/api.py
+++ b/arkindex/process/api.py
@@ -1747,8 +1747,11 @@ class WorkerActivityBase(ListAPIView):
     serializer_class = WorkerStatisticsSerializer
     pagination_class = None
     queryset = WorkerActivity.objects \
-        .values('worker_version_id', 'configuration_id') \
-        .annotate(
+        .values(
+            'worker_version_id',
+            'configuration_id',
+            'model_version_id'
+        ).annotate(
             average_processed_time=Avg(
                 F('updated') - F('started'),
                 filter=Q(state=WorkerActivityState.Processed, started__isnull=False),
diff --git a/arkindex/process/serializers/workers.py b/arkindex/process/serializers/workers.py
index f89b6fc7af5a608b8af65ec470eb098bc1775861..fd8c2f315f4cfd8d2e2b44d4556fda068573ee79 100644
--- a/arkindex/process/serializers/workers.py
+++ b/arkindex/process/serializers/workers.py
@@ -296,7 +296,8 @@ class WorkerActivitySerializer(serializers.ModelSerializer):
         # Avoid loading up to 1000 processes when opening this endpoint in a browser
         style={'base_template': 'input.html'},
     )
-    configuration_id = serializers.UUIDField(read_only=True, allow_null=True, required=False)
+    configuration_id = serializers.UUIDField(read_only=True, allow_null=True)
+    model_version_id = serializers.UUIDField(read_only=True, allow_null=True)
     worker_version_id = serializers.UUIDField(read_only=True)
 
     class Meta:
@@ -306,6 +307,7 @@ class WorkerActivitySerializer(serializers.ModelSerializer):
             'process_id',
             'configuration_id',
             'worker_version_id',
+            'model_version_id',
             'created',
             'updated',
             'started',
@@ -317,6 +319,7 @@ class WorkerActivitySerializer(serializers.ModelSerializer):
             'started',
             'configuration_id',
             'worker_version_id',
+            'model_version_id',
         )
 
     def validate_process_id(self, process):
@@ -417,6 +420,7 @@ class WorkerStatisticsSerializer(serializers.Serializer):
     """
     worker_version_id = serializers.UUIDField(read_only=True)
     configuration_id = serializers.UUIDField(read_only=True, allow_null=True)
+    model_version_id = serializers.UUIDField(read_only=True, allow_null=True)
     queued = serializers.IntegerField(read_only=True)
     started = serializers.IntegerField(read_only=True)
     processed = serializers.IntegerField(read_only=True)
diff --git a/arkindex/process/tests/test_workeractivity.py b/arkindex/process/tests/test_workeractivity.py
index 138625035ebf0872006dedd69d3075717bfd737f..0c4ff82264631e9c358c32dc6dd43a5040e3c967 100644
--- a/arkindex/process/tests/test_workeractivity.py
+++ b/arkindex/process/tests/test_workeractivity.py
@@ -732,6 +732,7 @@ class TestWorkerActivity(FixtureTestCase):
                     'process_id': str(self.process.id),
                     'worker_version_id': str(self.worker_version.id),
                     'configuration_id': str(self.configuration.id),
+                    'model_version_id': str(self.model_version.id),
                     'state': 'queued'
                 }
             ]
@@ -761,6 +762,7 @@ class TestWorkerActivity(FixtureTestCase):
                     'process_id': str(self.process.id),
                     'worker_version_id': str(self.worker_version.id),
                     'configuration_id': str(self.configuration.id),
+                    'model_version_id': str(self.model_version.id),
                     'state': 'started',
                 }
             ]
@@ -813,6 +815,7 @@ class TestWorkerActivity(FixtureTestCase):
                     'process_id': str(process.id),
                     'worker_version_id': str(self.worker_version.id),
                     'configuration_id': None,
+                    'model_version_id': None,
                     'state': 'queued'
                 }
             ]
@@ -849,6 +852,7 @@ class TestWorkerActivity(FixtureTestCase):
                     'process_id': str(self.process.id),
                     'worker_version_id': str(self.worker_version.id),
                     'configuration_id': None,
+                    'model_version_id': None,
                     'state': 'processed'
                 }
             ]
diff --git a/arkindex/process/tests/test_workeractivity_stats.py b/arkindex/process/tests/test_workeractivity_stats.py
index 27e3e23c031533ecfe24293cb274c4bbb59863f6..820660721d6372daef0beb96d16505be60208f88 100644
--- a/arkindex/process/tests/test_workeractivity_stats.py
+++ b/arkindex/process/tests/test_workeractivity_stats.py
@@ -17,10 +17,11 @@ from arkindex.process.models import (
     WorkerVersion,
 )
 from arkindex.project.tests import FixtureAPITestCase
+from arkindex.training.models import Model
 from arkindex.users.models import Role, User
 
 
-class TestWorkersActivity(FixtureAPITestCase):
+class TestWorkerActivityStats(FixtureAPITestCase):
 
     @classmethod
     def setUpTestData(cls):
@@ -28,6 +29,8 @@ class TestWorkersActivity(FixtureAPITestCase):
         cls.version_1 = WorkerVersion.objects.get(worker__slug='reco')
         cls.version_2 = WorkerVersion.objects.get(worker__slug='dla')
         cls.configuration_1 = WorkerConfiguration.objects.create(name='some_config', configuration={'aa': 'bb'}, worker=cls.version_1.worker)
+        cls.model = Model.objects.create(name='Loukoum', public=False)
+        cls.model_version = cls.model.versions.create()
         cls.private_corpus = Corpus.objects.create(name='private', public=False)
         cls.process_1 = Process.objects.first()
         cls.process_2 = Process.objects.create(
@@ -44,6 +47,7 @@ class TestWorkersActivity(FixtureAPITestCase):
                     state=state,
                     worker_version_id=cls.version_1.id,
                     configuration_id=cls.configuration_1.id,
+                    model_version_id=cls.model_version.id,
                     process_id=cls.process_1.id,
                     started=datetime.now(timezone.utc),
                 ) for elt, state in zip(cls.corpus.elements.all(), itertools.cycle(WorkerActivityState))
@@ -133,6 +137,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             {
                 'worker_version_id': str(self.version_1.id),
                 'configuration_id': str(self.configuration_1.id),
+                'model_version_id': str(self.model_version.id),
                 'queued': self.queued,
                 'started': self.started,
                 'processed': self.processed,
@@ -145,6 +150,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             }, {
                 'worker_version_id': str(self.version_2.id),
                 'configuration_id': None,
+                'model_version_id': None,
                 'queued': 0,
                 'started': 0,
                 'processed': self.corpus.elements.count(),
@@ -197,6 +203,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             {
                 'worker_version_id': str(self.version_1.id),
                 'configuration_id': str(self.configuration_1.id),
+                'model_version_id': str(self.model_version.id),
                 'queued': self.queued,
                 'started': self.started,
                 'processed': 4,
@@ -209,6 +216,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             }, {
                 'worker_version_id': str(self.version_2.id),
                 'configuration_id': None,
+                'model_version_id': None,
                 'queued': 0,
                 'started': 0,
                 'processed': self.corpus.elements.count(),
@@ -236,6 +244,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             {
                 'worker_version_id': str(self.version_1.id),
                 'configuration_id': str(self.configuration_1.id),
+                'model_version_id': str(self.model_version.id),
                 'queued': self.queued,
                 'started': self.started,
                 'processed': 0,
@@ -286,6 +295,7 @@ class TestWorkersActivity(FixtureAPITestCase):
             {
                 'worker_version_id': str(self.version_1.id),
                 'configuration_id': str(self.configuration_1.id),
+                'model_version_id': str(self.model_version.id),
                 'queued': self.queued,
                 'started': self.started,
                 'processed': self.processed,