diff --git a/examples/gemini/README.md b/examples/gemini/README.md
index 769f48ef..a884132c 100644
--- a/examples/gemini/README.md
+++ b/examples/gemini/README.md
@@ -11,7 +11,8 @@ prompto_run_experiment --file data/input/gemini-example.jsonl --max-queries 30
 
 ## Multimodal prompting
 
-Multimodal prompting is available with the Gemini API. We provide an example notebook in the [Multimodal prompting with Vertex AI notebook](./gemini-multimodal.ipynb) and example experiment file in [data/input/gemini-multimodal-example.jsonl](https://github.com/alan-turing-institute/prompto/blob/main/examples/gemini/data/input/gemini-multimodal-example.jsonl). You can run it with the following command:
+Multimodal prompting is available with the Gemini API. To use it, you first need to upload your files to a dedicated cloud storage using the [File API](https://ai.google.dev/api/files#v1beta.files). To support you with this step, we provide a [notebook](./gemini-upload.ipynb) which takes your multimedia prompts as input and will add to each of your `media` elements a corresponding `uploaded_filename` key/value. You can test this with the example experiment file in [data/input/gemini-multimodal-example.jsonl](https://github.com/alan-turing-institute/prompto/blob/main/examples/gemini/data/input/gemini-multimodal-example.jsonl).
+Then, we provide an example notebook in the [Multimodal prompting with Vertex AI notebook](./gemini-multimodal.ipynb). You can run it with the following command:
 ```bash
 prompto_run_experiment --file data/input/gemini-multimodal-example.jsonl --max-queries 30
 ```
diff --git a/examples/gemini/data/input/gemini-multimodal-example.jsonl b/examples/gemini/data/input/gemini-multimodal-example.jsonl
index 8d649647..ee0a0061 100644
--- a/examples/gemini/data/input/gemini-multimodal-example.jsonl
+++ b/examples/gemini/data/input/gemini-multimodal-example.jsonl
@@ -1,3 +1,10 @@
-{"id": 0, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe what is happening in this image", {"type": "image", "media": "pantani_giro.jpg"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
-{"id": 1, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": [{"type": "image", "media": "mortadella.jpg"}, "what is this?"]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
-{"id": 2, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["what is in this image?", {"type": "image", "media": "pantani_giro.jpg"}]}, {"role": "model", "parts": "This is image shows a group of cyclists."}, {"role": "user", "parts": "are there any notable cyclists in this image? what are their names?"}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 1, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe what is happening in this image", {"type": "image", "media": "pantani_giro.jpg"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 2, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": [{"type": "image", "media": "mortadella.jpg"}, "what is this?"]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 3, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["what is in this image?", {"type": "image", "media": "pantani_giro.jpg"}]}, {"role": "model", "parts": "This is image shows a group of cyclists."}, {"role": "user", "parts": "are there any notable cyclists in this image? what are their names?"}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 4, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe what is happening in this video", {"type": "video", "media": "test.mp4"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 5, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe what is happening in this audio", {"type": "audio", "media": "test.wav"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 6, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe what is happening in this audio", {"type": "audio", "media": "test.mp3"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 7, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe this video", {"type": "video", "media": "test.mp4"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 8, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "user", "parts": ["describe this video", {"type": "video", "media": "test2.mp4"}]}], "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 1000}}
+{"id": 9, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": "How does technology impact us?", "safety_filter": "none", "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 100}}
+{"id": 10, "api": "gemini", "model_name": "gemini-1.5-flash", "prompt": [{"role": "system", "parts": "You are a helpful assistant designed to answer questions briefly."}, {"role": "user", "parts": "Hello, I'm Bob and I'm 6 years old"}, {"role": "model", "parts": "Hi Bob, how may I assist you?"}, {"role": "user", "parts": "How old will I be next year?"}], "safety_filter": "most", "parameters": {"candidate_count": 1, "temperature": 1, "max_output_tokens": 100}}
diff --git a/examples/gemini/data/media/test.mp3 b/examples/gemini/data/media/test.mp3
new file mode 100644
index 00000000..0764d7a2
Binary files /dev/null and b/examples/gemini/data/media/test.mp3 differ
diff --git a/examples/gemini/data/media/test.mp4 b/examples/gemini/data/media/test.mp4
new file mode 100644
index 00000000..5030fc49
Binary files /dev/null and b/examples/gemini/data/media/test.mp4 differ
diff --git a/examples/gemini/data/media/test.wav b/examples/gemini/data/media/test.wav
new file mode 100644
index 00000000..9bdf83cb
Binary files /dev/null and b/examples/gemini/data/media/test.wav differ
diff --git a/examples/gemini/data/media/test2.mp4 b/examples/gemini/data/media/test2.mp4
new file mode 100644
index 00000000..5030fc49
Binary files /dev/null and b/examples/gemini/data/media/test2.mp4 differ
diff --git a/examples/gemini/gemini-upload.ipynb b/examples/gemini/gemini-upload.ipynb
new file mode 100644
index 00000000..59f1613a
--- /dev/null
+++ b/examples/gemini/gemini-upload.ipynb
@@ -0,0 +1,206 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Uploading media to Gemini\n",
+    "\n",
+    "This notebook processes an experiment file and associate each media element with the id of the file when uploaded using the Files API"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import os\n",
+    "import json\n",
+    "import time\n",
+    "import tqdm\n",
+    "import base64\n",
+    "import hashlib\n",
+    "import google.generativeai as genai"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Set the location of the experiment and media\n",
+    "\n",
+    "experiment_location = \"data/input\"\n",
+    "filename = \"gemini-multimodal-example.jsonl\"\n",
+    "media_location = \"data/media\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Load the GEMINI_API_KEY from the environment\n",
+    "\n",
+    "GEMINI_API_KEY = os.environ.get(\"GEMINI_API_KEY\")\n",
+    "if GEMINI_API_KEY is None:\n",
+    "    raise ValueError(\"GEMINI_API_KEY is not set\")\n",
+    "\n",
+    "genai.configure(api_key=GEMINI_API_KEY)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def compute_sha256_base64(file_path, chunk_size=8192):\n",
+    "    \"\"\"\n",
+    "    Compute the SHA256 hash of the file at 'file_path' and return it as a base64-encoded string.\n",
+    "    \"\"\"\n",
+    "    hasher = hashlib.sha256()\n",
+    "    with open(file_path, \"rb\") as f:\n",
+    "        for chunk in iter(lambda: f.read(chunk_size), b\"\"):\n",
+    "            hasher.update(chunk)\n",
+    "    return base64.b64encode(hasher.digest()).decode(\"utf-8\")\n",
+    "\n",
+    "\n",
+    "def remote_file_hash_base64(remote_file):\n",
+    "    \"\"\"\n",
+    "    Convert a remote file's SHA256 hash (stored as a hex-encoded UTF-8 bytes object)\n",
+    "    to a base64-encoded string.\n",
+    "    \"\"\"\n",
+    "    hex_str = remote_file.sha256_hash.decode(\"utf-8\")\n",
+    "    raw_bytes = bytes.fromhex(hex_str)\n",
+    "    return base64.b64encode(raw_bytes).decode(\"utf-8\")\n",
+    "\n",
+    "\n",
+    "def wait_for_processing(file_obj, poll_interval=10):\n",
+    "    \"\"\"\n",
+    "    Poll until the file is no longer in the 'PROCESSING' state.\n",
+    "    Returns the updated file object.\n",
+    "    \"\"\"\n",
+    "    while file_obj.state.name == \"PROCESSING\":\n",
+    "        print(\"Waiting for file to be processed...\")\n",
+    "        time.sleep(poll_interval)\n",
+    "        file_obj = genai.get_file(file_obj.name)\n",
+    "    return file_obj\n",
+    "\n",
+    "\n",
+    "def upload(file_path, already_uploaded_files):\n",
+    "    \"\"\"\n",
+    "    Upload the file at 'file_path' if it hasn't been uploaded yet.\n",
+    "    If a file with the same SHA256 (base64-encoded) hash exists, returns its name.\n",
+    "    Otherwise, uploads the file, waits for it to be processed,\n",
+    "    and returns the new file's name. Raises a ValueError if processing fails.\n",
+    "    \"\"\"\n",
+    "    local_hash = compute_sha256_base64(file_path)\n",
+    "\n",
+    "    if local_hash in already_uploaded_files:\n",
+    "        return already_uploaded_files[local_hash], already_uploaded_files\n",
+    "\n",
+    "    # Upload the file if it hasn't been found.\n",
+    "    file_obj = genai.upload_file(path=file_path)\n",
+    "    file_obj = wait_for_processing(file_obj)\n",
+    "\n",
+    "    if file_obj.state.name == \"FAILED\":\n",
+    "        raise ValueError(\"File processing failed\")\n",
+    "    already_uploaded_files[local_hash] = file_obj.name\n",
+    "    return already_uploaded_files[local_hash], already_uploaded_files"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Retrieve already uploaded files\n",
+    "\n",
+    "uploaded_files = {\n",
+    "    remote_file_hash_base64(remote_file): remote_file.name\n",
+    "    for remote_file in genai.list_files()\n",
+    "}\n",
+    "print(f\"Found {len(uploaded_files)} files already uploaded\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "files_to_upload = set()\n",
+    "experiment_path = f\"{experiment_location}/{filename}\"\n",
+    "\n",
+    "# Read and collect media file paths\n",
+    "with open(experiment_path, \"r\") as f:\n",
+    "    lines = f.readlines()\n",
+    "\n",
+    "data_list = []\n",
+    "\n",
+    "for line in lines:\n",
+    "    data = json.loads(line)\n",
+    "    data_list.append(data)\n",
+    "\n",
+    "    if not isinstance(data.get(\"prompt\"), list):\n",
+    "        continue\n",
+    "\n",
+    "    files_to_upload.update(\n",
+    "        f'{media_location}/{el[\"media\"]}'\n",
+    "        for prompt in data[\"prompt\"]\n",
+    "        for part in prompt.get(\"parts\", [])\n",
+    "        if isinstance(el := part, dict) and \"media\" in el\n",
+    "    )\n",
+    "\n",
+    "# Upload files and store mappings\n",
+    "genai_files = {}\n",
+    "for file_path in tqdm.tqdm(files_to_upload):\n",
+    "    uploaded_filename, uploaded_files = upload(file_path, uploaded_files)\n",
+    "    genai_files[file_path] = uploaded_filename\n",
+    "\n",
+    "# Modify data to include uploaded filenames\n",
+    "for data in data_list:\n",
+    "    if isinstance(data.get(\"prompt\"), list):\n",
+    "        for prompt in data[\"prompt\"]:\n",
+    "            for part in prompt.get(\"parts\", []):\n",
+    "                if isinstance(part, dict) and \"media\" in part:\n",
+    "                    file_path = f'{media_location}/{part[\"media\"]}'\n",
+    "                    if file_path in genai_files:\n",
+    "                        part[\"uploaded_filename\"] = genai_files[file_path]\n",
+    "                    else:\n",
+    "                        print(f\"Failed to find {file_path} in genai_files\")\n",
+    "\n",
+    "# Write modified data back to the JSONL file\n",
+    "with open(experiment_path, \"w\") as f:\n",
+    "    for data in data_list:\n",
+    "        f.write(json.dumps(data) + \"\\n\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": ".venv",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/src/prompto/apis/gemini/gemini_utils.py b/src/prompto/apis/gemini/gemini_utils.py
index 5ed6dc87..b57d8540 100644
--- a/src/prompto/apis/gemini/gemini_utils.py
+++ b/src/prompto/apis/gemini/gemini_utils.py
@@ -31,6 +31,7 @@ def parse_parts_value(part: dict | str, media_folder: str) -> any:
 
     # read multimedia type
     type = part.get("type")
+    uploaded_filename = part.get("uploaded_filename")
     if type is None:
         raise ValueError("Multimedia type is not specified")
     # read file location
@@ -38,22 +39,20 @@ def parse_parts_value(part: dict | str, media_folder: str) -> any:
     if media is None:
         raise ValueError("File location is not specified")
 
-    # create Part object based on multimedia type
     if type == "text":
         return media
     else:
-        if type == "image":
-            media_file_path = os.path.join(media_folder, media)
-            return PIL.Image.open(media_file_path)
-        elif type == "file":
+        if uploaded_filename is None:
+            raise ValueError(
+                f"File {media} not uploaded. Please upload the file first."
+            )
+        else:
             try:
-                return get_file(name=media)
+                return get_file(name=uploaded_filename)
             except Exception as err:
                 raise ValueError(
                     f"Failed to get file: {media} due to error: {type(err).__name__} - {err}"
                 )
-        else:
-            raise ValueError(f"Unsupported multimedia type: {type}")
 
 
 def parse_parts(parts: list[dict | str] | dict | str, media_folder: str) -> list[any]:
diff --git a/tests/apis/gemini/test_gemini_image_input.py b/tests/apis/gemini/test_gemini_image_input.py
new file mode 100644
index 00000000..c1113aba
--- /dev/null
+++ b/tests/apis/gemini/test_gemini_image_input.py
@@ -0,0 +1,50 @@
+import os
+
+from PIL import Image
+
+from prompto.apis.gemini.gemini_utils import parse_parts_value
+
+
+def test_parse_parts_value_text():
+    part = "text"
+    media_folder = "media"
+    result = parse_parts_value(part, media_folder)
+    assert result == part
+
+
+def test_parse_parts_value_image():
+    part = "image"
+    media_folder = "media"
+    result = parse_parts_value(part, media_folder)
+    assert result == part
+
+
+def test_parse_parts_value_image_dict():
+    part = {"type": "image", "media": "pantani_giro.jpg"}
+    media_folder = "media"
+
+    # Create a mock image
+    if not os.path.exists(media_folder):
+        os.makedirs(media_folder)
+    image_path = os.path.join(media_folder, "pantani_giro.jpg")
+    image = Image.new("RGB", (100, 100), color="red")
+    image.save(image_path)
+
+    result = parse_parts_value(part, media_folder)
+
+    # Assert the result
+    assert result.mode == "RGB"
+    assert result.size == (100, 100)
+    assert result.filename.endswith("pantani_giro.jpg")
+
+    # Clean up the mock image
+    os.remove(image_path)
+    os.rmdir(media_folder)
+
+
+def test_parse_parts_value_video():
+    part = {"type": "video", "media": "pantani_giro.mp4"}
+    media_folder = "media"
+
+    result = parse_parts_value(part, media_folder)
+    assert result == part