Fix logger definition and provider fallback in LLMClient

ragbench_eval/config.py

@@ -10,9 +10,8 @@ RAGBENCH_DATASET = "galileo-ai/ragbench"
 
 #Will be "groq" if env var is missing OR empty
 LLM_PROVIDER = (os.getenv("RAGBENCH_LLM_PROVIDER") or "groq").lower()
-
-GEN_MODEL = os.getenv("RAGBENCH_GEN_MODEL", "llama3-8b-8192")
-JUDGE_MODEL = os.getenv("RAGBENCH_JUDGE_MODEL", "llama3-70b-8192")
+GEN_MODEL = os.getenv("RAGBENCH_GEN_MODEL", "llama-3.1-8b-instant")
+JUDGE_MODEL = os.getenv("RAGBENCH_JUDGE_MODEL", "llama-3.1-70b-versatile")
 
 EMBEDDING_MODEL = os.getenv(
     "RAGBENCH_EMBEDDING_MODEL",