diff --git a/README.md b/README.md
index 800c7d2..90fcb3a 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,11 @@ The openai model name, defaults to `gpt-3.5-turbo`.
 
 ***dolly_model (str):***
 
-The dolly model name, defaults to `databricks/dolly-v2-12b`.
+The dolly model name, defaults to `databricks/dolly-v2-3b`.
+
+**customize_llm (Any):***
+
+Users customize LLM.
 
 <br />
 
diff --git a/eqa_search.py b/eqa_search.py
index d66c251..39f341d 100644
--- a/eqa_search.py
+++ b/eqa_search.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Optional, Union
+from typing import Optional, Union, Any
 
 from towhee import ops, pipe, AutoPipes, AutoConfig
 from pydantic import BaseModel
@@ -38,7 +38,9 @@ class EnhancedQASearchConfig(BaseModel):
     # config for llm
     llm_src: Optional[str] = 'openai'
     openai_model: Optional[str] = 'gpt-3.5-turbo'
-    dolly_model: Optional[str] = 'databricks/dolly-v2-12b'
+    dolly_model: Optional[str] = 'databricks/dolly-v2-3b'
+
+    customize_llm: Optional[Any] = None
 
 
 _hf_models = ops.sentence_embedding.transformers().get_op().supported_model_names()
@@ -77,6 +79,8 @@ def _get_similarity_evaluation_op(config):
 
 
 def _get_llm_op(config):
+    if config.customize_llm:
+        return config.customize_llm
     if config.llm_src.lower() == 'openai':
         return ops.LLM.OpenAI(model_name=config.openai_model, api_key=config.openai_api_key)
     if config.llm_src.lower() == 'dolly':