diff --git a/labelme/ai/__init__.py b/labelme/ai/__init__.py
index b9e79f275..61ad687b2 100644
--- a/labelme/ai/__init__.py
+++ b/labelme/ai/__init__.py
@@ -1,5 +1,6 @@
 import gdown
 
+from .efficient_sam import EfficientSam
 from .segment_anything_model import SegmentAnythingModel
 
 
@@ -51,8 +52,30 @@ def __init__(self):
         )
 
 
+class EfficientSamVitT(EfficientSam):
+    name = "EfficientSam (speed)"
+
+    def __init__(self):
+        super().__init__(
+            encoder_path="/Users/wkentaro/Projects/Labelme/efficient-sam/weights/efficient_sam_vitt_encoder.onnx",
+            decoder_path="/Users/wkentaro/Projects/Labelme/efficient-sam/weights/efficient_sam_vitt_decoder.onnx",
+        )
+
+
+class EfficientSamVitS(EfficientSam):
+    name = "EfficientSam (accuracy)"
+
+    def __init__(self):
+        super().__init__(
+            encoder_path="/Users/wkentaro/Projects/Labelme/efficient-sam/weights/efficient_sam_vits_encoder.onnx",
+            decoder_path="/Users/wkentaro/Projects/Labelme/efficient-sam/weights/efficient_sam_vits_decoder.onnx",
+        )
+
+
 MODELS = [
-    SegmentAnythingModelVitL,
     SegmentAnythingModelVitB,
+    SegmentAnythingModelVitL,
     SegmentAnythingModelVitH,
+    EfficientSamVitT,
+    EfficientSamVitS,
 ]
diff --git a/labelme/ai/efficient_sam.py b/labelme/ai/efficient_sam.py
new file mode 100644
index 000000000..194b54bdd
--- /dev/null
+++ b/labelme/ai/efficient_sam.py
@@ -0,0 +1,109 @@
+import collections
+import threading
+
+import imgviz
+import numpy as np
+import onnxruntime
+import skimage
+
+from ..logger import logger
+
+from . import _utils
+
+
+class EfficientSam:
+    def __init__(self, encoder_path, decoder_path):
+        self._encoder_session = onnxruntime.InferenceSession(encoder_path)
+        self._decoder_session = onnxruntime.InferenceSession(decoder_path)
+
+        self._lock = threading.Lock()
+        self._image_embedding_cache = collections.OrderedDict()
+
+        self._thread = None
+
+    def set_image(self, image: np.ndarray):
+        with self._lock:
+            self._image = image
+            self._image_embedding = self._image_embedding_cache.get(
+                self._image.tobytes()
+            )
+
+        if self._image_embedding is None:
+            self._thread = threading.Thread(
+                target=self._compute_and_cache_image_embedding
+            )
+            self._thread.start()
+
+    def _compute_and_cache_image_embedding(self):
+        with self._lock:
+            logger.debug("Computing image embedding...")
+            image = imgviz.rgba2rgb(self._image)
+            batched_images = (
+                image.transpose(2, 0, 1)[None].astype(np.float32) / 255.0
+            )
+            (self._image_embedding,) = self._encoder_session.run(
+                output_names=None,
+                input_feed={"batched_images": batched_images},
+            )
+            if len(self._image_embedding_cache) > 10:
+                self._image_embedding_cache.popitem(last=False)
+            self._image_embedding_cache[
+                self._image.tobytes()
+            ] = self._image_embedding
+            logger.debug("Done computing image embedding.")
+
+    def _get_image_embedding(self):
+        if self._thread is not None:
+            self._thread.join()
+            self._thread = None
+        with self._lock:
+            return self._image_embedding
+
+    def predict_mask_from_points(self, points, point_labels):
+        return _compute_mask_from_points(
+            decoder_session=self._decoder_session,
+            image=self._image,
+            image_embedding=self._get_image_embedding(),
+            points=points,
+            point_labels=point_labels,
+        )
+
+    def predict_polygon_from_points(self, points, point_labels):
+        mask = self.predict_mask_from_points(
+            points=points, point_labels=point_labels
+        )
+        return _utils.compute_polygon_from_mask(mask=mask)
+
+
+def _compute_mask_from_points(
+    decoder_session, image, image_embedding, points, point_labels
+):
+    input_point = np.array(points, dtype=np.float32)
+    input_label = np.array(point_labels, dtype=np.float32)
+
+    # batch_size, num_queries, num_points, 2
+    batched_point_coords = input_point[None, None, :, :]
+    # batch_size, num_queries, num_points
+    batched_point_labels = input_label[None, None, :]
+
+    decoder_inputs = {
+        "image_embeddings": image_embedding,
+        "batched_point_coords": batched_point_coords,
+        "batched_point_labels": batched_point_labels,
+        "orig_im_size": np.array(image.shape[:2], dtype=np.int64),
+    }
+
+    masks, _, _ = decoder_session.run(None, decoder_inputs)
+    mask = masks[0, 0, 0, :, :]  # (1, 1, 3, H, W) -> (H, W)
+    mask = mask > 0.0
+
+    MIN_SIZE_RATIO = 0.05
+    skimage.morphology.remove_small_objects(
+        mask, min_size=mask.sum() * MIN_SIZE_RATIO, out=mask
+    )
+
+    if 0:
+        imgviz.io.imsave(
+            "mask.jpg", imgviz.label2rgb(mask, imgviz.rgb2gray(image))
+        )
+    return mask
diff --git a/labelme/config/default_config.yaml b/labelme/config/default_config.yaml
index 7a630f5c5..30c20f77b 100644
--- a/labelme/config/default_config.yaml
+++ b/labelme/config/default_config.yaml
@@ -31,7 +31,7 @@ shape:
   point_size: 8
 
 ai:
-  default: 'SegmentAnything (balanced)'
+  default: 'EfficientSam (accuracy)'
 
 # main
 flag_dock: