BerriAI/litellm · error · ValueError

Vector store search is not supported for {custom_llm_provide

Error message

Vector store search is not supported for {custom_llm_provider}

What it means

Provider-support check for vector store search: the resolved custom_llm_provider has no vector-store search config, so semantic/retrieval search cannot be dispatched to that provider.

Source

Thrown at litellm/vector_stores/main.py:411

        if "/" in custom_llm_provider:
            api_type, custom_llm_provider, _, _ = get_llm_provider(
                model=custom_llm_provider,
                custom_llm_provider=None,
                litellm_params=None,
            )
        else:
            api_type = None
            custom_llm_provider = custom_llm_provider

        # get provider config - using vector store custom logger for now
        vector_store_provider_config: Final = ProviderConfigManager.get_provider_vector_stores_config(
            provider=litellm.LlmProviders(custom_llm_provider),
            api_type=api_type,
        )

        if vector_store_provider_config is None:
            raise ValueError(f"Vector store search is not supported for {custom_llm_provider}")

        local_vars.update(kwargs)

        # Get VectorStoreSearchOptionalRequestParams with only valid parameters
        vector_store_search_optional_params: Final[VectorStoreSearchOptionalRequestParams] = (
            VectorStoreRequestUtils.get_requested_vector_store_search_optional_param(
                local_vars,
                vector_store_provider_config=vector_store_provider_config,
            )
        )

        # Pre Call logging
        litellm_logging_obj.update_from_kwargs(
            kwargs=kwargs,
            model=api_type,
            optional_params={
                "vector_store_id": vector_store_id,
                "query": query,

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Use a provider that supports vector store search, or implement it in a custom provider wrapper for {custom_llm_provider}.

When it happens

Trigger: Thrown at litellm/vector_stores/main.py:411 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/67d438f972b59f54. Report an issue: GitHub.