From 0bfe256ba06177d792d33a532999cf3bb8cce586 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Tue, 14 Jul 2026 07:08:13 +0000
Subject: [PATCH] fix(vertex_ai/embeddings): accept encoding_format without
 hard error

---
 .../vertex_embeddings/transformation.py       |  2 +-
 .../vertex_ai/vertex_embeddings/__init__.py   |  0
 .../vertex_embeddings/test_transformation.py  | 40 +++++++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 tests/test_litellm/llms/vertex_ai/vertex_embeddings/__init__.py
 create mode 100644 tests/test_litellm/llms/vertex_ai/vertex_embeddings/test_transformation.py

diff --git a/litellm/llms/vertex_ai/vertex_embeddings/transformation.py b/litellm/llms/vertex_ai/vertex_embeddings/transformation.py
index 6b7e6c036c0..722aec3fad8 100644
--- a/litellm/llms/vertex_ai/vertex_embeddings/transformation.py
+++ b/litellm/llms/vertex_ai/vertex_embeddings/transformation.py
@@ -73,7 +73,7 @@ class VertexAITextEmbeddingConfig(BaseModel):
         }
 
     def get_supported_openai_params(self):
-        return ["dimensions"]
+        return ["dimensions", "encoding_format"]
 
     def map_openai_params(self, non_default_params: dict, optional_params: dict, kwargs: dict):
         for param, value in non_default_params.items():
diff --git a/tests/test_litellm/llms/vertex_ai/vertex_embeddings/__init__.py b/tests/test_litellm/llms/vertex_ai/vertex_embeddings/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/test_litellm/llms/vertex_ai/vertex_embeddings/test_transformation.py b/tests/test_litellm/llms/vertex_ai/vertex_embeddings/test_transformation.py
new file mode 100644
index 00000000000..b0122985310
--- /dev/null
+++ b/tests/test_litellm/llms/vertex_ai/vertex_embeddings/test_transformation.py
@@ -0,0 +1,40 @@
+import os
+import sys
+
+import pytest
+
+sys.path.insert(0, os.path.abspath("../../../../.."))
+
+import litellm
+from litellm.llms.vertex_ai.vertex_embeddings.transformation import (
+    VertexAITextEmbeddingConfig,
+)
+from litellm.utils import get_optional_params_embeddings
+
+
+def test_encoding_format_is_supported_and_not_forwarded():
+    config = VertexAITextEmbeddingConfig()
+
+    assert "encoding_format" in config.get_supported_openai_params()
+
+    optional_params, _ = config.map_openai_params(
+        non_default_params={"encoding_format": "float"},
+        optional_params={},
+        kwargs={},
+    )
+
+    assert "encoding_format" not in optional_params
+
+
+@pytest.mark.parametrize("encoding_format", ["float", "base64"])
+def test_get_optional_params_embeddings_encoding_format_does_not_raise(monkeypatch, encoding_format):
+    monkeypatch.setattr(litellm, "drop_params", False)
+
+    optional_params = get_optional_params_embeddings(
+        model="textembedding-gecko@003",
+        encoding_format=encoding_format,
+        custom_llm_provider="vertex_ai",
+        drop_params=False,
+    )
+
+    assert "encoding_format" not in optional_params