diff --git a/backend/services/llm.py b/backend/services/llm.py
index 9102dcd8..0ec855a2 100644
--- a/backend/services/llm.py
+++ b/backend/services/llm.py
@@ -19,7 +19,6 @@ import litellm
 from litellm.files.main import ModelResponse
 from utils.logger import logger
 from utils.config import config
-from utils.constants import PROVIDERS
 
 # litellm.set_verbose=True
 litellm.modify_params=True
@@ -39,7 +38,8 @@ class LLMRetryError(LLMError):
 
 def setup_api_keys() -> None:
     """Set up API keys from environment variables."""
-    for provider in PROVIDERS:
+    providers = ['OPENAI', 'ANTHROPIC', 'GROQ', 'OPENROUTER', 'XAI']
+    for provider in providers:
         key = getattr(config, f'{provider}_API_KEY')
         if key:
             logger.debug(f"API key set for provider: {provider}")
diff --git a/backend/utils/constants.py b/backend/utils/constants.py
index c70538cf..7d9d4246 100644
--- a/backend/utils/constants.py
+++ b/backend/utils/constants.py
@@ -168,5 +168,3 @@ MODEL_ACCESS_TIERS = {
     "tier_125_800": PAID_TIER_MODELS,
     "tier_200_1000": PAID_TIER_MODELS,
 }
-
-PROVIDERS = ['OPENAI', 'ANTHROPIC', 'GROQ', 'OPENROUTER', 'XAI']
\ No newline at end of file