diff --git a/litellm/llms/bedrock/embed/cohere_transformation.py b/litellm/llms/bedrock/embed/cohere_transformation.py
index d1c9ceb99d1..8a17bb9d595 100644
--- a/litellm/llms/bedrock/embed/cohere_transformation.py
+++ b/litellm/llms/bedrock/embed/cohere_transformation.py
@@ -20,7 +20,9 @@ class BedrockCohereEmbeddingConfig:
     def map_openai_params(self, non_default_params: dict, optional_params: dict) -> dict:
         for k, v in non_default_params.items():
             if k == "encoding_format":
-                optional_params["embedding_types"] = v if isinstance(v, list) else [v]
+                optional_params["embedding_types"] = [
+                    "float" if fmt == "base64" else fmt for fmt in (tuple(v) if isinstance(v, list) else (v,))
+                ]
             elif k == "dimensions":
                 optional_params["output_dimension"] = v
         return optional_params
diff --git a/litellm/utils.py b/litellm/utils.py
index fa2226dbf2c..6c87cf5102e 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -3581,7 +3581,7 @@ def get_optional_params_embeddings(
             object = litellm.AmazonTitanMultimodalEmbeddingG1Config()
         elif "amazon.titan-embed-text-v2:0" in model:
             object = litellm.AmazonTitanV2Config()
-        elif "cohere.embed-multilingual-v3" in model or "cohere.embed-v4" in model:
+        elif "cohere.embed" in model:
             object = litellm.BedrockCohereEmbeddingConfig()
         elif "twelvelabs" in model or "marengo" in model:
             object = litellm.TwelveLabsMarengoEmbeddingConfig()
diff --git a/tests/test_litellm/llms/bedrock/embed/test_bedrock_embedding.py b/tests/test_litellm/llms/bedrock/embed/test_bedrock_embedding.py
index 65ae719d021..08d01127eba 100644
--- a/tests/test_litellm/llms/bedrock/embed/test_bedrock_embedding.py
+++ b/tests/test_litellm/llms/bedrock/embed/test_bedrock_embedding.py
@@ -945,7 +945,7 @@ def test_titan_image_embedding_cost_uses_per_image_rate():
     "encoding_format,expected_embedding_types",
     [
         ("float", ["float"]),
-        ("base64", ["base64"]),
+        ("base64", ["float"]),
         (["float", "int8"], ["float", "int8"]),
     ],
 )
diff --git a/tests/test_litellm/test_utils.py b/tests/test_litellm/test_utils.py
index 1ff50bd0116..f94c618b960 100644
--- a/tests/test_litellm/test_utils.py
+++ b/tests/test_litellm/test_utils.py
@@ -4432,6 +4432,53 @@ class TestVertexEmbeddingEncodingFormat:
         assert optional_params.get("outputDimensionality") == 256
 
 
+class TestBedrockCohereEmbeddingDispatch:
+    """All bedrock cohere.embed models must route to BedrockCohereEmbeddingConfig,
+    not just multilingual-v3/v4: english-v3 was falling into the unmapped
+    else-branch and rejecting encoding_format. Issue #38659."""
+
+    @pytest.mark.parametrize(
+        "model",
+        [
+            "cohere.embed-english-v3",
+            "cohere.embed-multilingual-v3",
+            "cohere.embed-v4:0",
+        ],
+    )
+    def test_cohere_embed_models_accept_encoding_format(self, model):
+        optional_params = litellm.utils.get_optional_params_embeddings(
+            model=model,
+            encoding_format="float",
+            custom_llm_provider="bedrock",
+        )
+        assert optional_params.get("embedding_types") == ["float"]
+
+    @pytest.mark.parametrize(
+        "model",
+        [
+            "cohere.embed-english-v3",
+            "cohere.embed-multilingual-v3",
+            "cohere.embed-v4:0",
+        ],
+    )
+    def test_cohere_embed_models_map_base64_to_float(self, model):
+        optional_params = litellm.utils.get_optional_params_embeddings(
+            model=model,
+            encoding_format="base64",
+            custom_llm_provider="bedrock",
+        )
+        assert optional_params.get("embedding_types") == ["float"]
+
+    def test_cohere_embed_english_v3_maps_dimensions(self):
+        optional_params = litellm.utils.get_optional_params_embeddings(
+            model="cohere.embed-english-v3",
+            encoding_format="float",
+            dimensions=512,
+            custom_llm_provider="bedrock",
+        )
+        assert optional_params.get("output_dimension") == 512
+
+
 @pytest.mark.parametrize(
     "model",
     [