diff --git a/bson/src/commonMain/kotlin/types/Vector.kt b/bson/src/commonMain/kotlin/types/Vector.kt
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+/*
+ * Copyright (c) 2026, OpenSavvy and contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package opensavvy.ktmongo.bson.types
+
+import opensavvy.ktmongo.bson.BsonType
+import opensavvy.ktmongo.dsl.LowLevelApi
+
+/**
+ * A dense array of numeric values stored in a binary storage efficient for storage and retrieval.
+ *
+ * Vectors are effectively used to represent data in artificial intelligence, machine learning, semantic search, computer vision, and natural language processing applications.
+ *
+ * All values within the vector must be of the same [type].
+ *
+ * ### Comparison with BSON arrays
+ *
+ * BSON arrays are serialized as objects, where the keys are integers (but still encoded as UTF8 strings).
+ * Arrays have a minimum overhead of 3 bytes per stored element.
+ *
+ * Vectors are serialized contiguously, so there is no overhead per element.
+ *
+ * However, arrays and vectors are not interchangeable. Most MongoDB operators expect one or the other,
+ * but will not work with both.
+ *
+ * ### External resources
+ *
+ * - [Atlas Vector Search](https://www.mongodb.com/docs/atlas/atlas-vector-search/vector-search-overview/)
+ * - [Specification](https://github.com/mongodb/specifications/blob/master/source/bson-binary-vector/bson-binary-vector.md)
+ */
+interface Vector {
+
+	/**
+	 * The type of the elements in the vector (called `dtype` in the specification).
+	 *
+	 * Currently, the following types are implemented:
+	 * - `0x03`: [ByteVector]
+	 * - `0x27`: [FloatVector]
+	 * - `0x10`: [PackedBitVector]
+	 *
+	 * In most situations, users of this library should use `is` checks with one of the implementing subclasses
+	 * rather than attempting to match on this property.
+	 */
+	@LowLevelApi
+	val type: Byte
+
+	/**
+	 * The raw data stored in this vector.
+	 *
+	 * **When reading this property, remember to take into account any declared [padding]!**
+	 *
+	 * For more information on this field, read [the specification](https://github.com/mongodb/specifications/blob/master/source/bson-binary-vector/bson-binary-vector.md).
+	 */
+	@LowLevelApi
+	val raw: ByteArray
+
+	/**
+	 * The number of bits in the final byte of [raw] that are to be ignored.
+	 *
+	 * This is useful for [types][type] that don't fit in multiples of 8 bits.
+	 *
+	 * For more information on this field, read [the specification](https://github.com/mongodb/specifications/blob/master/source/bson-binary-vector/bson-binary-vector.md).
+	 */
+	@LowLevelApi
+	val padding: Byte
+
+	/**
+	 * Converts this [Vector] into a [ByteArray] that fits into the content of [BsonType.BinaryData].
+	 *
+	 * Vector is the binary subtype `0x09`.
+	 */
+	@LowLevelApi
+	fun toBinaryData(): ByteArray {
+		val r = raw
+		return ByteArray(r.size + 2) { index ->
+			when (index) {
+				0 -> type
+				1 -> padding
+				else -> r[index - 2]
+			}
+		}
+	}
+}