diff --git a/run_agent.py b/run_agent.py
index 7187499bb1..8db343a2a5 100644
--- a/run_agent.py
+++ b/run_agent.py
@@ -2399,6 +2399,7 @@ class AIAgent:
                 base_url=aux_base_url,
                 api_key=aux_api_key,
                 config_context_length=getattr(self, "_aux_compression_context_length_config", None),
+                provider=getattr(self, "provider", ""),
             )
 
             # Hard floor: the auxiliary compression model must have at least
diff --git a/tests/run_agent/test_compression_feasibility.py b/tests/run_agent/test_compression_feasibility.py
index 2050bee28e..7b4b7da612 100644
--- a/tests/run_agent/test_compression_feasibility.py
+++ b/tests/run_agent/test_compression_feasibility.py
@@ -184,6 +184,7 @@ def test_feasibility_check_passes_config_context_length(mock_get_client, mock_ct
         base_url="http://custom-endpoint:8080/v1",
         api_key="sk-custom",
         config_context_length=1_000_000,
+        provider="openrouter",
     )
 
 
@@ -206,6 +207,7 @@ def test_feasibility_check_ignores_invalid_context_length(mock_get_client, mock_
         base_url="http://custom:8080/v1",
         api_key="sk-test",
         config_context_length=None,
+        provider="openrouter",
     )
 
 
@@ -258,6 +260,7 @@ def test_init_feasibility_check_uses_aux_context_override_from_config():
         base_url="http://custom-endpoint:8080/v1",
         api_key="sk-custom",
         config_context_length=1_000_000,
+        provider="",
     )