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Fix get_complete_url to honour ANTHROPIC_BASE_URL in experimental passthrough

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Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Devin Petersohn 2026-03-19 12:37:12 -07:00 • committed by Devin Petersohn
parent b7e2269942
commit f784da41af
2 changed files with 25 additions and 2 deletions
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3
litellm/llms/anthropic/experimental_pass_through/messages/transformation.py
View file

@ -23,7 +23,6 @@ from ...common_utils import (
optionally_handle_anthropic_oauth,
)
DEFAULT_ANTHROPIC_API_BASE = "https://api.anthropic.com"
DEFAULT_ANTHROPIC_API_VERSION = "2023-06-01"
@ -127,7 +126,7 @@ class AnthropicMessagesConfig(BaseAnthropicMessagesConfig):
litellm_params: dict,
stream: Optional[bool] = None,
) -> str:
api_base = api_base or DEFAULT_ANTHROPIC_API_BASE
api_base = AnthropicModelInfo.get_api_base(api_base)
if not api_base.endswith("/v1/messages"):
api_base = f"{api_base}/v1/messages"
return api_base

24
tests/test_litellm/llms/anthropic/test_anthropic_common_utils.py
View file

@ -1107,3 +1107,27 @@ class TestPassthroughAuthToken:
assert updated_headers["x-api-key"] == FAKE_REGULAR_KEY
assert "authorization" not in updated_headers
def test_passthrough_get_complete_url_honours_base_url_env(self):
"""get_complete_url should use ANTHROPIC_BASE_URL when api_base is None."""
from unittest.mock import patch as mock_patch
from litellm.llms.anthropic.experimental_pass_through.messages.transformation import (
AnthropicMessagesConfig,
)
config = AnthropicMessagesConfig()
with mock_patch.dict(
"os.environ",
{"ANTHROPIC_BASE_URL": "https://custom.example.com"},
clear=True,
):
url = config.get_complete_url(
api_base=None,
api_key=FAKE_REGULAR_KEY,
model="claude-sonnet-4-5-20250929",
optional_params={},
litellm_params={},
)
assert url == "https://custom.example.com/v1/messages"