diff --git a/lib/sycamore/sycamore/llms/gemini.py b/lib/sycamore/sycamore/llms/gemini.py
index b4dc14607..e289fb22e 100644
--- a/lib/sycamore/sycamore/llms/gemini.py
+++ b/lib/sycamore/sycamore/llms/gemini.py
@@ -3,6 +3,7 @@
 from enum import Enum
 from typing import Any, Optional, Union
 import os
+import io
 
 from sycamore.llms.llms import LLM
 from sycamore.llms.prompts.prompts import RenderedPrompt
@@ -22,10 +23,10 @@ class GeminiModels(Enum):
     """Represents available Gemini models. More info: https://googleapis.github.io/python-genai/"""
 
     # Note that the models available on a given Gemini account may vary.
-    GEMINI_2_FLASH = GeminiModel(name="gemini-2.0-flash-exp", is_chat=True)
+    GEMINI_2_FLASH = GeminiModel(name="gemini-2.0-flash", is_chat=True)
     GEMINI_2_FLASH_LITE = GeminiModel(name="gemini-2.0-flash-lite-preview-02-05", is_chat=True)
-    GEMINI_2_FLASH_THINKING = GeminiModel(name="gemini-2.0-flash-thinking-exp", is_chat=True)
-    GEMINI_2_PRO = GeminiModel(name="gemini-2.0-pro-exp", is_chat=True)
+    GEMINI_2_FLASH_THINKING = GeminiModel(name="gemini-2.0-flash-thinking-exp-01-21", is_chat=True)
+    GEMINI_2_PRO = GeminiModel(name="gemini-2.0-pro-exp-02-05", is_chat=True)
 
     @classmethod
     def from_name(cls, name: str):
@@ -86,7 +87,7 @@ def get_generate_kwargs(self, prompt: RenderedPrompt, llm_kwargs: Optional[dict]
         if prompt.response_format:
             config["response_mime_type"] = "application/json"
             config["response_schema"] = prompt.response_format
-        content_list = []
+        content_list: list[types.Content] = []
         for message in prompt.messages:
             if message.role == "system":
                 config["system_message"] = message.content
@@ -95,13 +96,15 @@ def get_generate_kwargs(self, prompt: RenderedPrompt, llm_kwargs: Optional[dict]
             content = types.Content(parts=[types.Part.from_text(text=message.content)], role=role)
             if message.images:
                 for image in message.images:
-                    image_bytes = image.convert("RGB").tobytes()
-                    content.parts.append(types.Part.from_bytes(image_bytes, media_type="image/png"))
+                    buffered = io.BytesIO()
+                    image.save(buffered, format="PNG")
+                    image_bytes = buffered.getvalue()
+                    content.parts.append(types.Part.from_bytes(data=image_bytes, mime_type="image/png"))
             content_list.append(content)
         kwargs["config"] = None
         if config:
             kwargs["config"] = types.GenerateContentConfig(**config)
-        kwargs["content"] = content
+        kwargs["content"] = content_list
         return kwargs
 
     def generate_metadata(self, *, prompt: RenderedPrompt, llm_kwargs: Optional[dict] = None) -> dict: