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fix(fine_tuning): stop forwarding api_version to the OpenAI client (#44995)

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The OpenAI fine-tuning handler built its SDK client from every local it
received, so an api_version or litellm_params set on an openai
finetune_settings entry reached OpenAI.__init__ and every fine-tuning
call on that provider failed with "unexpected keyword argument
'api_version'". Build the client from its named params instead and
cover it with a request-level regression test

Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
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devin-ai-integration[bot] 2026-10-21 01:58:25 +00:00 • committed by GitHub
parent c515f80f82
commit cc156a73b8
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1 changed files with 41 additions and 1 deletions
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42
tests/unit/fine_tuning/test_main.py
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@ -1,11 +1,12 @@
import json
from typing import Final
from typing import Final, Literal
import httpx
import pytest
import respx
import litellm
from litellm.types.utils import LiteLLMFineTuningJob
API_BASE: Final = "https://fine-tuning.test"
BASE_MODEL: Final = "gpt-4.1-nano-2025-04-14"
@ -52,3 +53,42 @@ async def test_create_sends_the_model_without_the_provider_prefix(
)
assert json.loads(sent.calls.last.request.content)["model"] == BASE_MODEL
@pytest.mark.asyncio
@respx.mock
@pytest.mark.parametrize(
("custom_llm_provider", "api_base", "route", "sent_api_version"),
[
("openai", f"{API_BASE}/v1", f"{API_BASE}/v1/fine_tuning/jobs", None),
("azure", API_BASE, f"{API_BASE}/openai/fine_tuning/jobs", "2024-10-21"),
],
)
@pytest.mark.parametrize("is_async", [True, False], ids=["async", "sync"])
async def test_create_with_api_version_reaches_the_provider_and_only_azure_gets_it(
monkeypatch: pytest.MonkeyPatch,
custom_llm_provider: Literal["openai", "azure"],
api_base: str,
route: str,
sent_api_version: str | None,
is_async: bool,
) -> None:
sent: Final = respx.post(url__startswith=route).mock(return_value=httpx.Response(200, json=PROVIDER_JOB))
request: Final = {
"model": BASE_MODEL,
"training_file": "file-abc123",
"custom_llm_provider": custom_llm_provider,
"api_key": "sk-test",
"api_base": api_base,
"api_version": "2024-10-21",
}
async with httpx.AsyncClient() as session:
monkeypatch.setattr(litellm, "aclient_session", session)
job: Final = (
await litellm.acreate_fine_tuning_job(**request) if is_async else litellm.create_fine_tuning_job(**request)
)
assert isinstance(job, LiteLLMFineTuningJob)
assert job.id == PROVIDER_JOB["id"]
assert sent.calls.last.request.url.params.get("api-version") == sent_api_version