diff --git a/servers/fastapi/utils/llm_calls/generate_presentation_outlines.py b/servers/fastapi/utils/llm_calls/generate_presentation_outlines.py
index cd10de25..b35d84f5 100644
--- a/servers/fastapi/utils/llm_calls/generate_presentation_outlines.py
+++ b/servers/fastapi/utils/llm_calls/generate_presentation_outlines.py
@@ -82,7 +82,7 @@ async def generate_ppt_outline(
     language: Optional[str] = None,
     content: Optional[str] = None,
 ):
-    model = get_nano_model()
+    model = get_large_model()
     response_model = get_presentation_outline_model_with_n_slides(n_slides)
 
     if not is_google_selected():
diff --git a/servers/fastapi/utils/llm_calls/generate_presentation_structure.py b/servers/fastapi/utils/llm_calls/generate_presentation_structure.py
index 7de9578b..f4d90fb2 100644
--- a/servers/fastapi/utils/llm_calls/generate_presentation_structure.py
+++ b/servers/fastapi/utils/llm_calls/generate_presentation_structure.py
@@ -1,6 +1,11 @@
 from models.presentation_layout import PresentationLayoutModel
 from models.presentation_outline_model import PresentationOutlineModel
-from utils.llm_provider import get_llm_client, get_nano_model, get_small_model
+from utils.llm_provider import (
+    get_large_model,
+    get_llm_client,
+    get_nano_model,
+    get_small_model,
+)
 from utils.get_dynamic_models import (
     get_presentation_structure_model_with_n_slides,
 )
@@ -62,7 +67,7 @@ async def generate_presentation_structure(
 ) -> PresentationStructureModel:
 
     client = get_llm_client()
-    model = get_nano_model()
+    model = get_large_model()
     response_model = get_presentation_structure_model_with_n_slides(
         len(presentation_outline.slides)
     )
diff --git a/servers/fastapi/utils/llm_calls/generate_slide_content.py b/servers/fastapi/utils/llm_calls/generate_slide_content.py
index 5a865ac9..0d487bbb 100644
--- a/servers/fastapi/utils/llm_calls/generate_slide_content.py
+++ b/servers/fastapi/utils/llm_calls/generate_slide_content.py
@@ -5,8 +5,8 @@ from models.presentation_layout import SlideLayoutModel
 from models.presentation_outline_model import SlideOutlineModel
 from utils.llm_provider import (
     get_google_llm_client,
+    get_large_model,
     get_llm_client,
-    get_nano_model,
     is_google_selected,
 )
 from utils.schema_utils import remove_fields_from_schema
@@ -55,7 +55,7 @@ def get_prompt_to_generate_slide_content(title: str, outline: str):
 async def get_slide_content_from_type_and_outline(
     slide_layout: SlideLayoutModel, outline: SlideOutlineModel
 ):
-    model = get_nano_model()
+    model = get_large_model()
 
     response_schema = remove_fields_from_schema(
         slide_layout.json_schema, ["__image_url__", "__icon_url__"]
diff --git a/servers/fastapi/utils/llm_calls/select_slide_type_on_edit.py b/servers/fastapi/utils/llm_calls/select_slide_type_on_edit.py
index 6fd9ad45..861621d1 100644
--- a/servers/fastapi/utils/llm_calls/select_slide_type_on_edit.py
+++ b/servers/fastapi/utils/llm_calls/select_slide_type_on_edit.py
@@ -1,7 +1,7 @@
 from models.presentation_layout import PresentationLayoutModel, SlideLayoutModel
 from models.slide_layout_index import SlideLayoutIndex
 from models.sql.slide import SlideModel
-from utils.llm_provider import get_llm_client, get_nano_model, get_small_model
+from utils.llm_provider import get_large_model, get_llm_client
 
 
 def get_prompt_to_select_slide_layout(
@@ -42,7 +42,7 @@ async def get_slide_layout_from_prompt(
 ) -> SlideLayoutModel:
 
     client = get_llm_client()
-    model = get_nano_model()
+    model = get_large_model()
 
     slide_layout_ids = list(map(lambda x: x.id, layout.slides))
 
diff --git a/servers/fastapi/utils/llm_provider.py b/servers/fastapi/utils/llm_provider.py
index f4e801ea..27b87146 100644
--- a/servers/fastapi/utils/llm_provider.py
+++ b/servers/fastapi/utils/llm_provider.py
@@ -92,7 +92,7 @@ def get_google_llm_client():
 def get_large_model():
     selected_llm = get_llm_provider()
     if selected_llm == LLMProvider.OPENAI:
-        return "gpt-4.1"
+        return "o3"
     elif selected_llm == LLMProvider.GOOGLE:
         return "gemini-2.0-flash"
     elif selected_llm == LLMProvider.OLLAMA: