From 1c4674441c52afe22dbbe49402529fb67c78147c Mon Sep 17 00:00:00 2001
From: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
Date: Sat, 29 Aug 2026 16:43:05 -0700
Subject: [PATCH] docs(openai): trim tool-flattening docstrings to upstream
 facts

---
 litellm/llms/openai/chat/gpt_transformation.py         | 10 +---------
 .../llms/openai/chat/test_openai_gpt_transformation.py |  5 +----
 2 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/litellm/llms/openai/chat/gpt_transformation.py b/litellm/llms/openai/chat/gpt_transformation.py
index 89062f60fc7..a81884702e9 100644
--- a/litellm/llms/openai/chat/gpt_transformation.py
+++ b/litellm/llms/openai/chat/gpt_transformation.py
@@ -416,11 +416,6 @@ class OpenAIGPTConfig(BaseLLMModelInfo, BaseConfig):
         custom_llm_provider: str | None,
         api_base: str | None,
     ) -> bool:
-        """
-        True only for the generic `openai` provider actually pointed at
-        api.openai.com (no custom api_base, or an openai.com host): the one
-        backend enforcing OpenAI-only request strictness.
-        """
         if custom_llm_provider != "openai":
             return False
         resolved_api_base = api_base or litellm.api_base or os.getenv("OPENAI_BASE_URL") or os.getenv("OPENAI_API_BASE")
@@ -454,10 +449,7 @@ class OpenAIGPTConfig(BaseLLMModelInfo, BaseConfig):
         """
         OpenAI's chat completions validator rejects tool `parameters` carrying
         'oneOf'/'anyOf'/'allOf'/'enum'/'const'/'not' at the top level for every
-        model family (unlike the Responses API, where GPT-5+ accepts them), so
-        tool schemas bound for api.openai.com get their top-level combinators
-        flattened; OpenAI-compatible backends on a custom api_base accept the
-        caller's schema as-is and keep it.
+        model family, unlike the Responses API, where GPT-5+ accepts them.
         """
         tools: Final = optional_params.get("tools")
         if not isinstance(tools, list):
diff --git a/tests/test_litellm/llms/openai/chat/test_openai_gpt_transformation.py b/tests/test_litellm/llms/openai/chat/test_openai_gpt_transformation.py
index e65ef239068..19b245449a3 100644
--- a/tests/test_litellm/llms/openai/chat/test_openai_gpt_transformation.py
+++ b/tests/test_litellm/llms/openai/chat/test_openai_gpt_transformation.py
@@ -981,10 +981,7 @@ class TestToolSchemaCombinatorFlatteningForOpenAI:
     """
     Regression tests for LIT-6488: OpenAI's chat completions validator rejects
     tool parameters carrying a top-level anyOf/oneOf/allOf for every model
-    family (GPT-5 included, unlike the Responses API), so requests bound for
-    api.openai.com get those combinators flattened into one object schema,
-    while OpenAI-compatible backends on a custom api_base and other providers
-    keep the caller's schema untouched.
+    family, GPT-5 included, unlike the Responses API.
     """
 
     def setup_method(self):