diff --git a/openai/__init__.py b/openai/__init__.py
index f80085eada..5180f88fc6 100644
--- a/openai/__init__.py
+++ b/openai/__init__.py
@@ -26,6 +26,7 @@
 
 if TYPE_CHECKING:
     from aiohttp import ClientSession
+    import requests
 
 api_key = os.environ.get("OPENAI_API_KEY")
 # Path of a file with an API key, whose contents can change. Supercedes
@@ -47,6 +48,10 @@
 debug = False
 log = None  # Set to either 'debug' or 'info', controls console logging
 
+session: ContextVar[Optional["requests.Session"]] = ContextVar(
+    "requests-session", default=None
+)
+
 aiosession: ContextVar[Optional["ClientSession"]] = ContextVar(
     "aiohttp-session", default=None
 )  # Acts as a global aiohttp ClientSession that reuses connections.
diff --git a/openai/api_requestor.py b/openai/api_requestor.py
index 827b73b78e..4a9124e70f 100644
--- a/openai/api_requestor.py
+++ b/openai/api_requestor.py
@@ -511,7 +511,10 @@ def request_raw(
         )
 
         if not hasattr(_thread_context, "session"):
-            _thread_context.session = _make_session()
+            session = openai.session.get()
+            if not session:
+                session = _make_session()
+            _thread_context.session = session
         try:
             result = _thread_context.session.request(
                 method,
diff --git a/openai/tests/test_endpoints.py b/openai/tests/test_endpoints.py
index c3fc1094bb..4deb227934 100644
--- a/openai/tests/test_endpoints.py
+++ b/openai/tests/test_endpoints.py
@@ -2,6 +2,7 @@
 import json
 
 import pytest
+import requests
 
 import openai
 from openai import error
@@ -86,3 +87,11 @@ def test_timeout_does_not_error():
         model="ada",
         request_timeout=10,
     )
+
+
+def test_user_passed_session():
+    with requests.Session() as session:
+        openai.session.set(session)
+
+        completion = openai.Completion.create(prompt="test", model="ada")
+        assert completion