BerriAI/litellm · error · ValueError

Vector store file create is not supported for {custom_llm_pr

Error message

Vector store file create is not supported for {custom_llm_provider}

What it means

Provider-support check in vector_store_file create: after _ensure_provider and credential prep, no provider config implements file creation for the resolved custom_llm_provider, so the operation cannot be routed to any backend.

Source

Thrown at litellm/vector_store_files/main.py:136

    **kwargs,
) -> VectorStoreFileObject | Coroutine[Any, Any, VectorStoreFileObject]:
    local_vars: Final = locals()
    try:
        litellm_logging_obj: Final[LiteLLMLoggingObj] = kwargs.get("litellm_logging_obj")
        litellm_call_id: Final[str | None] = kwargs.get("litellm_call_id")
        _is_async: Final = kwargs.pop("acreate", False) is True

        custom_llm_provider = _ensure_provider(custom_llm_provider)

        _prepare_registry_credentials(vector_store_id=vector_store_id, kwargs=kwargs)

        litellm_params: Final = GenericLiteLLMParams(vector_store_id=vector_store_id, **kwargs)

        provider_config: Final = ProviderConfigManager.get_provider_vector_store_files_config(
            provider=LlmProviders(custom_llm_provider)
        )
        if provider_config is None:
            raise ValueError(f"Vector store file create is not supported for {custom_llm_provider}")

        local_vars.update(kwargs)
        create_request: VectorStoreFileCreateRequest = VectorStoreFileRequestUtils.get_create_request_params(local_vars)
        create_request["file_id"] = file_id

        litellm_logging_obj.update_from_kwargs(
            kwargs=kwargs,
            model=None,
            optional_params={
                "vector_store_id": vector_store_id,
                **create_request,
            },
            litellm_params={
                "vector_store_id": vector_store_id,
                "litellm_call_id": litellm_call_id,
                **litellm_params.model_dump(exclude_none=True),
            },
            custom_llm_provider=custom_llm_provider,

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Use a provider that supports vector store file creation (e.g. openai, azure) instead of {custom_llm_provider}.
2. Implement the operation in a custom provider wrapper.

When it happens

Trigger: Thrown at litellm/vector_store_files/main.py:136 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/93efd140ed88e842. Report an issue: GitHub.