diff --git a/stacks/litellm/conf/config.yaml b/stacks/litellm/conf/config.yaml
index e602c8d..d1d85c8 100644
--- a/stacks/litellm/conf/config.yaml
+++ b/stacks/litellm/conf/config.yaml
@@ -60,7 +60,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.7
+      top_p: 0.8
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: false
     model_info:
@@ -78,6 +81,11 @@ model_list:
       model: hosted_vllm/qwen-image-bench
       api_base: http://10.250.50.54:8014/v1
       api_key: os.environ/VLLM_API_KEY
+      temperature: 0
+      top_p: 1.0
+      extra_body:
+        top_k: 1
+        repetition_penalty: 1.05
     model_info:
       mode: chat
   - model_name: image-judge
@@ -85,6 +93,11 @@ model_list:
       model: hosted_vllm/qwen-image-bench
       api_base: http://10.250.50.54:8014/v1
       api_key: os.environ/VLLM_API_KEY
+      temperature: 0
+      top_p: 1.0
+      extra_body:
+        top_k: 1
+        repetition_penalty: 1.05
     model_info:
       mode: chat
 
@@ -110,7 +123,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.7
+      top_p: 0.8
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: false
     model_info:
@@ -121,7 +137,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.6
+      top_p: 0.95
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: true
     model_info:
@@ -132,7 +151,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.7
+      top_p: 0.8
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: false
     model_info:
@@ -143,7 +165,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.6
+      top_p: 0.95
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: true
     model_info:
@@ -154,7 +179,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.7
+      top_p: 0.8
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: false
     model_info:
@@ -165,7 +193,10 @@ model_list:
       api_base: http://10.250.50.54:8013/v1
       api_key: os.environ/VLLM_API_KEY
       presence_penalty: 1.0
+      temperature: 0.6
+      top_p: 0.95
       extra_body:
+        top_k: 20
         chat_template_kwargs:
           enable_thinking: true
     model_info:
@@ -180,6 +211,8 @@ model_list:
       model: hosted_vllm/selene-1-mini-8b
       api_base: http://10.250.50.54:8011/v1
       api_key: os.environ/VLLM_API_KEY
+      temperature: 0.6
+      top_p: 0.9
     model_info:
       mode: chat
 
@@ -212,6 +245,8 @@ model_list:
       model: hosted_vllm/selene-1-mini-8b
       api_base: http://10.250.50.54:8011/v1
       api_key: os.environ/VLLM_API_KEY
+      temperature: 0.6
+      top_p: 0.9
     model_info:
       mode: chat
   # reranker → generic capability name for rerank (currently qwen3-reranker).