diff --git a/openhands/experiments/experiment_manager.py b/openhands/experiments/experiment_manager.py
new file mode 100644
index 0000000000..39c6af6284
--- /dev/null
+++ b/openhands/experiments/experiment_manager.py
@@ -0,0 +1,19 @@
+import os
+
+from openhands.server.session.conversation_init_data import ConversationInitData
+from openhands.utils.import_utils import get_impl
+
+
+class ExperimentManager:
+    @staticmethod
+    def run_conversation_variant_test(
+        user_id: str, conversation_id: str, conversation_settings: ConversationInitData
+    ) -> ConversationInitData:
+        return conversation_settings
+
+
+experiment_manager_cls = os.environ.get(
+    'OPENHANDS_EXPERIMENT_MANAGER_CLS',
+    'openhands.experiments.experiment_manager.ExperimentManager',
+)
+ExperimentManagerImpl = get_impl(ExperimentManager, experiment_manager_cls)
diff --git a/openhands/server/listen_socket.py b/openhands/server/listen_socket.py
index 365c63d1d0..dd49f30bce 100644
--- a/openhands/server/listen_socket.py
+++ b/openhands/server/listen_socket.py
@@ -19,6 +19,7 @@ from openhands.events.observation.agent import (
     AgentStateChangedObservation,
 )
 from openhands.events.serialization import event_to_dict
+from openhands.experiments.experiment_manager import ExperimentManagerImpl
 from openhands.integrations.provider import PROVIDER_TOKEN_TYPE, ProviderToken
 from openhands.integrations.service_types import ProviderType
 from openhands.server.session.conversation_init_data import ConversationInitData
@@ -49,7 +50,7 @@ def create_provider_tokens_object(
 
 
 async def setup_init_convo_settings(
-    user_id: str | None, providers_set: list[ProviderType]
+    user_id: str | None, conversation_id: str, providers_set: list[ProviderType]
 ) -> ConversationInitData:
     settings_store = await SettingsStoreImpl.get_instance(config, user_id)
     settings = await settings_store.load()
@@ -73,7 +74,11 @@ async def setup_init_convo_settings(
     if user_secrets:
         session_init_args['custom_secrets'] = user_secrets.custom_secrets
 
-    return ConversationInitData(**session_init_args)
+    convo_init_data = ConversationInitData(**session_init_args)
+    # We should recreate the same experiment conditions when restarting a conversation
+    return ExperimentManagerImpl.run_conversation_variant_test(
+        user_id, conversation_id, convo_init_data
+    )
 
 
 @sio.event
@@ -119,7 +124,9 @@ async def connect(connection_id: str, environ: dict) -> None:
             f'User {user_id} is allowed to connect to conversation {conversation_id}'
         )
 
-        conversation_init_data = await setup_init_convo_settings(user_id, providers_set)
+        conversation_init_data = await setup_init_convo_settings(
+            user_id, conversation_id, providers_set
+        )
         agent_loop_info = await conversation_manager.join_conversation(
             conversation_id,
             connection_id,
diff --git a/openhands/server/services/conversation_service.py b/openhands/server/services/conversation_service.py
index e0e9867d4c..ccb3c75e90 100644
--- a/openhands/server/services/conversation_service.py
+++ b/openhands/server/services/conversation_service.py
@@ -4,6 +4,7 @@ from typing import Any
 
 from openhands.core.logger import openhands_logger as logger
 from openhands.events.action.message import MessageAction
+from openhands.experiments.experiment_manager import ExperimentManagerImpl
 from openhands.integrations.provider import (
     CUSTOM_SECRETS_TYPE_WITH_JSON_SCHEMA,
     PROVIDER_TOKEN_TYPE,
@@ -78,6 +79,8 @@ async def create_new_conversation(
     session_init_args['git_provider'] = git_provider
     session_init_args['conversation_instructions'] = conversation_instructions
     conversation_init_data = ConversationInitData(**session_init_args)
+
+
     logger.info('Loading conversation store')
     conversation_store = await ConversationStoreImpl.get_instance(config, user_id)
     logger.info('ServerConversation store loaded')
@@ -93,6 +96,7 @@ async def create_new_conversation(
             extra={'user_id': user_id, 'session_id': conversation_id},
         )
 
+        conversation_init_data = ExperimentManagerImpl.run_conversation_variant_test(user_id, conversation_id, conversation_init_data)
         conversation_title = get_default_conversation_title(conversation_id)
 
         logger.info(f'Saving metadata for conversation {conversation_id}')
@@ -105,6 +109,7 @@ async def create_new_conversation(
                 selected_repository=selected_repository,
                 selected_branch=selected_branch,
                 git_provider=git_provider,
+                llm_model=settings.llm_model,
             )
         )
 
diff --git a/openhands/storage/data_models/conversation_metadata.py b/openhands/storage/data_models/conversation_metadata.py
index d089811afa..8adea2835a 100644
--- a/openhands/storage/data_models/conversation_metadata.py
+++ b/openhands/storage/data_models/conversation_metadata.py
@@ -25,6 +25,7 @@ class ConversationMetadata:
     trigger: ConversationTrigger | None = None
     pr_number: list[int] = field(default_factory=list)
     created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+    llm_model: str | None = None
     # Cost and token metrics
     accumulated_cost: float = 0.0
     prompt_tokens: int = 0