From fc9525026a348cb3fcc78441cb2c3de728f50f7f Mon Sep 17 00:00:00 2001
From: Jah-yee <166608075+Jah-yee@users.noreply.github.com>
Date: Fri, 24 Apr 2026 21:21:47 +0800
Subject: [PATCH] fix: resolve unbounded memory leak from TypeVar parameterized
 ParsedResponse types

Root cause: ParsedResponse[TextFormatT] where TextFormatT is a free TypeVar causes
model_rebuild to always return False, preventing MockCoreSchema._built_memo caching.
This causes a new SchemaValidator/SchemaSerializer (heavy Rust object) to be allocated
on every responses.parse() call, accumulating without bound.

Fix: Use non-parameterized base classes (ParsedResponse, ParsedResponseOutputText,
ParsedResponseOutputMessage) which are functionally identical at runtime but allow
pydantic's model_rebuild to succeed and cache the built schemas.

Fixes #3084
---
 src/openai/lib/_parsing/_responses.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/openai/lib/_parsing/_responses.py b/src/openai/lib/_parsing/_responses.py
index 8853a0749f..df48047d1c 100644
--- a/src/openai/lib/_parsing/_responses.py
+++ b/src/openai/lib/_parsing/_responses.py
@@ -68,7 +68,7 @@ def parse_response(
 
                 content_list.append(
                     construct_type_unchecked(
-                        type_=ParsedResponseOutputText[TextFormatT],
+                        type_=ParsedResponseOutputText,
                         value={
                             **item.to_dict(),
                             "parsed": parse_text(item.text, text_format=text_format),
@@ -78,7 +78,7 @@ def parse_response(
 
             output_list.append(
                 construct_type_unchecked(
-                    type_=ParsedResponseOutputMessage[TextFormatT],
+                    type_=ParsedResponseOutputMessage,
                     value={
                         **output.to_dict(),
                         "content": content_list,
@@ -130,7 +130,7 @@ def parse_response(
             output_list.append(output)
 
     return construct_type_unchecked(
-        type_=ParsedResponse[TextFormatT],
+        type_=ParsedResponse,
         value={
             **response.to_dict(),
             "output": output_list,