diff --git a/pr_agent/algo/ai_handler.py b/pr_agent/algo/ai_handler.py
index c3989563..3e4dc18a 100644
--- a/pr_agent/algo/ai_handler.py
+++ b/pr_agent/algo/ai_handler.py
@@ -7,11 +7,11 @@ from openai.error import APIError, RateLimitError, Timeout, TryAgain
 from retry import retry
 from pr_agent.config_loader import get_settings
 from pr_agent.log import get_logger
-
+from pr_agent.algo.base_ai_handler import BaseAiHandler
 OPENAI_RETRIES = 5
 
 
-class AiHandler:
+class AiHandler(BaseAiHandler):
     """
     This class handles interactions with the OpenAI API for chat completions.
     It initializes the API key and other settings from a configuration file,
diff --git a/pr_agent/algo/base_ai_handler.py b/pr_agent/algo/base_ai_handler.py
new file mode 100644
index 00000000..9cb40b5c
--- /dev/null
+++ b/pr_agent/algo/base_ai_handler.py
@@ -0,0 +1,48 @@
+from abc import ABC, abstractmethod
+
+class BaseAiHandler(ABC):
+    """
+    This class defines the interface for an AI handler.
+    """
+
+    @abstractmethod
+    def __init__(self):
+        pass
+
+    @property
+    @abstractmethod
+    def deployment_id(self):
+        pass
+
+    @abstractmethod
+    async def chat_completion(self, model: str, system: str, user: str, temperature: float = 0.2):
+        pass
+
+
+class AiHandler(BaseAiHandler):
+    """
+    This class handles interactions with the OpenAI API for chat completions.
+    It initializes the API key and other settings from a configuration file,
+    and provides a method for performing chat completions using the OpenAI ChatCompletion API.
+    """
+
+    # ... rest of your code ...
+
+
+class CustomAiHandler(BaseAiHandler):
+    """
+    This class is your custom AI handler that uses a different LLM library.
+    """
+
+    def __init__(self):
+        # Initialize your custom AI handler
+        pass
+
+    @property
+    def deployment_id(self):
+        # Return the deployment ID for your custom AI handler
+        pass
+
+    async def chat_completion(self, model: str, system: str, user: str, temperature: float = 0.2):
+        # Implement the chat completion method for your custom AI handler
+        pass
\ No newline at end of file
diff --git a/pr_agent/tools/pr_add_docs.py b/pr_agent/tools/pr_add_docs.py
index eec75b9c..04cc53f4 100644
--- a/pr_agent/tools/pr_add_docs.py
+++ b/pr_agent/tools/pr_add_docs.py
@@ -4,7 +4,7 @@ from typing import Dict
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.algo.utils import load_yaml
@@ -15,14 +15,14 @@ from pr_agent.log import get_logger
 
 
 class PRAddDocs:
-    def __init__(self, pr_url: str, cli_mode=False, args: list = None):
+    def __init__(self, pr_url: str, cli_mode=False, args: list = None, ai_handler: BaseAiHandler = AiHandler()):
 
         self.git_provider = get_git_provider()(pr_url)
         self.main_language = get_main_pr_language(
             self.git_provider.get_languages(), self.git_provider.get_files()
         )
 
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.patches_diff = None
         self.prediction = None
         self.cli_mode = cli_mode
diff --git a/pr_agent/tools/pr_code_suggestions.py b/pr_agent/tools/pr_code_suggestions.py
index 9e8d7f15..00e58a21 100644
--- a/pr_agent/tools/pr_code_suggestions.py
+++ b/pr_agent/tools/pr_code_suggestions.py
@@ -4,7 +4,7 @@ from typing import Dict, List
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, get_pr_multi_diffs, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.algo.utils import load_yaml
@@ -15,7 +15,7 @@ from pr_agent.log import get_logger
 
 
 class PRCodeSuggestions:
-    def __init__(self, pr_url: str, cli_mode=False, args: list = None):
+    def __init__(self, pr_url: str, cli_mode=False, args: list = None, ai_handler: BaseAiHandler = AiHandler() ):
 
         self.git_provider = get_git_provider()(pr_url)
         self.main_language = get_main_pr_language(
@@ -32,7 +32,7 @@ class PRCodeSuggestions:
         else:
             num_code_suggestions = get_settings().pr_code_suggestions.num_code_suggestions
 
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.patches_diff = None
         self.prediction = None
         self.cli_mode = cli_mode
diff --git a/pr_agent/tools/pr_description.py b/pr_agent/tools/pr_description.py
index c1bd03fd..9b02cd35 100644
--- a/pr_agent/tools/pr_description.py
+++ b/pr_agent/tools/pr_description.py
@@ -4,7 +4,7 @@ from typing import List, Tuple
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.algo.utils import load_yaml
@@ -15,7 +15,7 @@ from pr_agent.log import get_logger
 
 
 class PRDescription:
-    def __init__(self, pr_url: str, args: list = None):
+    def __init__(self, pr_url: str, args: list = None, ai_handler: BaseAiHandler = AiHandler()):
         """
         Initialize the PRDescription object with the necessary attributes and objects for generating a PR description
         using an AI model.
@@ -31,7 +31,7 @@ class PRDescription:
         self.pr_id = self.git_provider.get_pr_id()
 
         # Initialize the AI handler
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
     
         # Initialize the variables dictionary
         self.vars = {
diff --git a/pr_agent/tools/pr_information_from_user.py b/pr_agent/tools/pr_information_from_user.py
index 059966e1..27c77180 100644
--- a/pr_agent/tools/pr_information_from_user.py
+++ b/pr_agent/tools/pr_information_from_user.py
@@ -2,7 +2,7 @@ import copy
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.config_loader import get_settings
@@ -12,12 +12,12 @@ from pr_agent.log import get_logger
 
 
 class PRInformationFromUser:
-    def __init__(self, pr_url: str, args: list = None):
+    def __init__(self, pr_url: str, args: list = None, ai_handler: BaseAiHandler = AiHandler()):
         self.git_provider = get_git_provider()(pr_url)
         self.main_pr_language = get_main_pr_language(
             self.git_provider.get_languages(), self.git_provider.get_files()
         )
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.vars = {
             "title": self.git_provider.pr.title,
             "branch": self.git_provider.get_pr_branch(),
diff --git a/pr_agent/tools/pr_questions.py b/pr_agent/tools/pr_questions.py
index 7740fd4a..4aec3edf 100644
--- a/pr_agent/tools/pr_questions.py
+++ b/pr_agent/tools/pr_questions.py
@@ -2,7 +2,7 @@ import copy
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.config_loader import get_settings
@@ -12,13 +12,13 @@ from pr_agent.log import get_logger
 
 
 class PRQuestions:
-    def __init__(self, pr_url: str, args=None):
+    def __init__(self, pr_url: str, args=None, ai_handler: BaseAiHandler = AiHandler()):
         question_str = self.parse_args(args)
         self.git_provider = get_git_provider()(pr_url)
         self.main_pr_language = get_main_pr_language(
             self.git_provider.get_languages(), self.git_provider.get_files()
         )
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.question_str = question_str
         self.vars = {
             "title": self.git_provider.pr.title,
diff --git a/pr_agent/tools/pr_reviewer.py b/pr_agent/tools/pr_reviewer.py
index ed99ddf6..c78a11e8 100644
--- a/pr_agent/tools/pr_reviewer.py
+++ b/pr_agent/tools/pr_reviewer.py
@@ -6,7 +6,7 @@ import yaml
 from jinja2 import Environment, StrictUndefined
 from yaml import SafeLoader
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.algo.utils import convert_to_markdown, load_yaml, try_fix_yaml
@@ -21,7 +21,7 @@ class PRReviewer:
     """
     The PRReviewer class is responsible for reviewing a pull request and generating feedback using an AI model.
     """
-    def __init__(self, pr_url: str, is_answer: bool = False, is_auto: bool = False, args: list = None):
+    def __init__(self, pr_url: str, is_answer: bool = False, is_auto: bool = False, args: list = None, ai_handler: BaseAiHandler = AiHandler()):
         """
         Initialize the PRReviewer object with the necessary attributes and objects to review a pull request.
 
@@ -42,7 +42,7 @@ class PRReviewer:
 
         if self.is_answer and not self.git_provider.is_supported("get_issue_comments"):
             raise Exception(f"Answer mode is not supported for {get_settings().config.git_provider} for now")
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.patches_diff = None
         self.prediction = None
 
diff --git a/pr_agent/tools/pr_update_changelog.py b/pr_agent/tools/pr_update_changelog.py
index a5f24e0d..f8a84960 100644
--- a/pr_agent/tools/pr_update_changelog.py
+++ b/pr_agent/tools/pr_update_changelog.py
@@ -5,7 +5,7 @@ from typing import Tuple
 
 from jinja2 import Environment, StrictUndefined
 
-from pr_agent.algo.ai_handler import AiHandler
+from pr_agent.algo.ai_handler import BaseAiHandler, AiHandler
 from pr_agent.algo.pr_processing import get_pr_diff, retry_with_fallback_models
 from pr_agent.algo.token_handler import TokenHandler
 from pr_agent.config_loader import get_settings
@@ -17,7 +17,7 @@ CHANGELOG_LINES = 50
 
 
 class PRUpdateChangelog:
-    def __init__(self, pr_url: str, cli_mode=False, args=None):
+    def __init__(self, pr_url: str, cli_mode=False, args=None, ai_handler: BaseAiHandler = AiHandler()):
 
         self.git_provider = get_git_provider()(pr_url)
         self.main_language = get_main_pr_language(
@@ -25,7 +25,7 @@ class PRUpdateChangelog:
         )
         self.commit_changelog = get_settings().pr_update_changelog.push_changelog_changes
         self._get_changlog_file()  # self.changelog_file_str
-        self.ai_handler = AiHandler()
+        self.ai_handler = ai_handler
         self.patches_diff = None
         self.prediction = None
         self.cli_mode = cli_mode