diff --git a/openai/api_requestor.py b/openai/api_requestor.py
index 3b5e0c1c92..186bdd284a 100644
--- a/openai/api_requestor.py
+++ b/openai/api_requestor.py
@@ -45,11 +45,11 @@ def _api_encode(data):
         elif isinstance(value, list) or isinstance(value, tuple):
             for i, sv in enumerate(value):
                 if isinstance(sv, dict):
-                    subdict = _encode_nested_dict("%s[]" % (key,), sv)
+                    subdict = _encode_nested_dict("%s[%d]" % (key, i), sv)
                     for k, v in _api_encode(subdict):
                         yield (k, v)
                 else:
-                    yield ("%s[]" % (key,), util.utf8(sv))
+                    yield ("%s[%d]" % (key, i), util.utf8(sv))
         elif isinstance(value, dict):
             subdict = _encode_nested_dict(key, value)
             for subkey, subvalue in _api_encode(subdict):
diff --git a/openai/api_resources/__init__.py b/openai/api_resources/__init__.py
index 2a77f47097..2cce27ae9b 100644
--- a/openai/api_resources/__init__.py
+++ b/openai/api_resources/__init__.py
@@ -4,7 +4,8 @@
 from openai.api_resources.error_object import ErrorObject
 from openai.api_resources.event import Event
 from openai.api_resources.file import File
-from openai.api_resources.higherlevel import HigherLevel
+from openai.api_resources.answer import Answer
+from openai.api_resources.classification import Classification
 from openai.api_resources.plan import Plan
 from openai.api_resources.run import Run
 from openai.api_resources.snapshot import Snapshot
diff --git a/openai/api_resources/answer.py b/openai/api_resources/answer.py
new file mode 100644
index 0000000000..8dd3e84d23
--- /dev/null
+++ b/openai/api_resources/answer.py
@@ -0,0 +1,14 @@
+from openai.openai_object import OpenAIObject
+
+
+class Answer(OpenAIObject):
+    api_prefix = "v1"
+
+    @classmethod
+    def get_url(self, base):
+        return "/%s/%s" % (self.api_prefix, base)
+
+    @classmethod
+    def create(cls, **params):
+        instance = cls()
+        return instance.request("post", cls.get_url("answers"), params)
diff --git a/openai/api_resources/classification.py b/openai/api_resources/classification.py
new file mode 100644
index 0000000000..b659164e5a
--- /dev/null
+++ b/openai/api_resources/classification.py
@@ -0,0 +1,14 @@
+from openai.openai_object import OpenAIObject
+
+
+class Classification(OpenAIObject):
+    api_prefix = "v1"
+
+    @classmethod
+    def get_url(self, base):
+        return "/%s/%s" % (self.api_prefix, base)
+
+    @classmethod
+    def create(cls, **params):
+        instance = cls()
+        return instance.request("post", cls.get_url("classifications"), params)
diff --git a/openai/api_resources/file.py b/openai/api_resources/file.py
index 3411a4a3bb..dcdb9b94df 100644
--- a/openai/api_resources/file.py
+++ b/openai/api_resources/file.py
@@ -7,8 +7,6 @@
 import openai
 from openai import api_requestor, util
 from openai.api_resources.abstract import (
-    APIResource,
-    CreateableAPIResource,
     DeletableAPIResource,
     ListableAPIResource,
     UpdateableAPIResource,
@@ -16,7 +14,7 @@
 from openai.util import log_info
 
 
-class File(ListableAPIResource):
+class File(ListableAPIResource, DeletableAPIResource):
     OBJECT_NAME = "file"
 
     @classmethod
diff --git a/openai/api_resources/higherlevel.py b/openai/api_resources/higherlevel.py
deleted file mode 100644
index da14918670..0000000000
--- a/openai/api_resources/higherlevel.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from openai.api_resources.abstract.engine_api_resource import EngineAPIResource
-
-
-class HigherLevel(EngineAPIResource):
-    api_prefix = "higherlevel"
-
-    def get_url(self, base):
-        return "/%s/%s" % (self.api_prefix, base)
-
-    def classification(self, **params):
-        return self.request("post", self.get_url("classifications"), params)
-
-    def answer(self, **params):
-        return self.request("post", self.get_url("answers"), params)
-
-    def retriever_file_set_search(self, **params):
-        return self.request("post", self.get_url("retriever_file_set_search"), params)
diff --git a/openai/cli.py b/openai/cli.py
index ba29fe6bc1..2c2429dc62 100644
--- a/openai/cli.py
+++ b/openai/cli.py
@@ -76,7 +76,7 @@ def generate(cls, args):
             top_p=args.top_p,
             logprobs=args.logprobs,
             stop=args.stop,
-            **kwargs
+            **kwargs,
         )
         if not args.stream:
             resp = [resp]
@@ -94,17 +94,34 @@ def generate(cls, args):
     @classmethod
     def search(cls, args):
         # Will soon be deprecated and replaced by a Search.create
-        resp = openai.Engine(id=args.id).search(
-            documents=args.documents, query=args.query
-        )
+        params = {
+            "query": args.query,
+            "max_rerank": args.max_rerank,
+            "return_metadata": args.return_metadata,
+        }
+        if args.documents:
+            params["documents"] = args.documents
+        if args.file:
+            params["file"] = args.file
+
+        resp = openai.Engine(id=args.id).search(**params)
         scores = [
             (search_result["score"], search_result["document"])
             for search_result in resp["data"]
         ]
         scores.sort(reverse=True)
+        dataset = (
+            args.documents if args.documents else [x["text"] for x in resp["data"]]
+        )
         for score, document_idx in scores:
             print("=== score {:.3f} ===".format(score))
-            print(args.documents[document_idx])
+            print(dataset[document_idx])
+            if (
+                args.return_metadata
+                and args.file
+                and "metadata" in resp["data"][document_idx]
+            ):
+                print(f"METADATA: {resp['data'][document_idx]['metadata']}")
 
     @classmethod
     def list(cls, args):
@@ -195,6 +212,31 @@ def list(cls, args):
         print(tags)
 
 
+class File:
+    @classmethod
+    def create(cls, args):
+        resp = openai.File.create(
+            file=open(args.file),
+            purpose=args.purpose,
+        )
+        print(resp)
+
+    @classmethod
+    def get(cls, args):
+        resp = openai.File.retrieve(id=args.id)
+        print(resp)
+
+    @classmethod
+    def delete(cls, args):
+        file = openai.File(id=args.id).delete()
+        print(file)
+
+    @classmethod
+    def list(cls, args):
+        file = openai.File.list()
+        print(file)
+
+
 class FineTuneCLI:
     @classmethod
     def list(cls, args):
@@ -311,8 +353,26 @@ def help(args):
         "-d",
         "--documents",
         action="append",
-        help="List of documents to search over",
-        required=True,
+        help="List of documents to search over. Only one of `documents` or `file` may be supplied.",
+        required=False,
+    )
+    sub.add_argument(
+        "-f",
+        "--file",
+        help="A file id to search over.  Only one of `documents` or `file` may be supplied.",
+        required=False,
+    )
+    sub.add_argument(
+        "--max_rerank",
+        help="The maximum number of documents to be re-ranked and returned by search. This flag only takes effect when `file` is set.",
+        type=int,
+        default=200,
+    )
+    sub.add_argument(
+        "--return_metadata",
+        help="A special boolean flag for showing metadata. If set `true`, each document entry in the returned json will contain a 'metadata' field. Default to be `false`. This flag only takes effect when `file` is set.",
+        type=bool,
+        default=False,
     )
     sub.add_argument("-q", "--query", required=True, help="Search query")
     sub.set_defaults(func=Engine.search)
@@ -424,7 +484,35 @@ def help(args):
     sub = subparsers.add_parser("tags.list")
     sub.set_defaults(func=Tag.list)
 
-    # /fine-tunes API
+    # Files
+    sub = subparsers.add_parser("files.create")
+
+    sub.add_argument(
+        "-f",
+        "--file",
+        required=True,
+        help="File to upload",
+    )
+    sub.add_argument(
+        "-p",
+        "--purpose",
+        help="Why are you uploading this file? (see https://beta.openai.com/docs/api-reference/ for purposes)",
+        required=True,
+    )
+    sub.set_defaults(func=File.create)
+
+    sub = subparsers.add_parser("files.get")
+    sub.add_argument("-i", "--id", required=True, help="The files ID")
+    sub.set_defaults(func=File.get)
+
+    sub = subparsers.add_parser("files.delete")
+    sub.add_argument("-i", "--id", required=True, help="The files ID")
+    sub.set_defaults(func=File.delete)
+
+    sub = subparsers.add_parser("files.list")
+    sub.set_defaults(func=File.list)
+
+    # Finetune
     sub = subparsers.add_parser("fine_tunes.list")
     sub.set_defaults(func=FineTuneCLI.list)
 
diff --git a/openai/multipart_data_generator.py b/openai/multipart_data_generator.py
index 8b29a2b551..93a683ee7b 100644
--- a/openai/multipart_data_generator.py
+++ b/openai/multipart_data_generator.py
@@ -4,6 +4,7 @@
 import io
 
 import openai
+import re
 
 
 class MultipartDataGenerator(object):
@@ -13,11 +14,19 @@ def __init__(self, chunk_size=1028):
         self.boundary = self._initialize_boundary()
         self.chunk_size = chunk_size
 
+    def _remove_array_element(self, input_string):
+        match = re.match(r"^(.*)\[.*\]$", input_string)
+        return match[1] if match else input_string
+
     def add_params(self, params):
         # Flatten parameters first
         params = dict(openai.api_requestor._api_encode(params))
 
         for key, value in openai.six.iteritems(params):
+
+            # strip array elements if present from key
+            key = self._remove_array_element(key)
+
             if value is None:
                 continue
 
diff --git a/openai/tests/test_endpoints.py b/openai/tests/test_endpoints.py
new file mode 100644
index 0000000000..25cc1cf764
--- /dev/null
+++ b/openai/tests/test_endpoints.py
@@ -0,0 +1,26 @@
+import openai
+import io
+import json
+import uuid
+
+### FILE TESTS
+def test_file_upload():
+    result = openai.File.create(
+        file=io.StringIO(json.dumps({"text": "test file data"})),
+        purpose="search",
+    )
+    assert result.purpose == "search"
+    assert "id" in result
+
+
+### COMPLETION TESTS
+def test_completions():
+    result = openai.Completion.create(prompt="This was a test", n=5, engine="davinci")
+    assert len(result.choices) == 5
+
+
+def test_completions_multiple_prompts():
+    result = openai.Completion.create(
+        prompt=["This was a test", "This was another test"], n=5, engine="davinci"
+    )
+    assert len(result.choices) == 10
diff --git a/openai/version.py b/openai/version.py
index 6cc293ea98..5a2867da19 100644
--- a/openai/version.py
+++ b/openai/version.py
@@ -1 +1 @@
-VERSION = "0.4.0"
+VERSION = "0.6.0"