{"record":{"id":"7bd61d5bfe987d24","repo":"BerriAI/litellm","slug":"delete-eval-is-not-supported-for-custom-llm-provi","errorCode":null,"errorMessage":"DELETE eval is not supported for {custom_llm_provider}","messagePattern":"DELETE eval is not supported for (.+?)","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"litellm/evals/main.py","lineNumber":884,"sourceCode":"    try:\n        litellm_logging_obj: Final[LiteLLMLoggingObj] = kwargs.get(\"litellm_logging_obj\")\n        litellm_call_id: Final[str | None] = kwargs.get(\"litellm_call_id\", None)\n        _is_async: Final = kwargs.pop(\"adelete_eval\", False) is True\n\n        # Get LiteLLM parameters\n        litellm_params: Final = GenericLiteLLMParams(**kwargs)\n\n        # Determine provider\n        if custom_llm_provider is None:\n            custom_llm_provider = \"openai\"\n\n        # Get provider config\n        evals_api_provider_config: BaseEvalsAPIConfig | None = ProviderConfigManager.get_provider_evals_api_config(\n            provider=litellm.LlmProviders(custom_llm_provider),\n        )\n\n        if evals_api_provider_config is None:\n            raise ValueError(f\"DELETE eval is not supported for {custom_llm_provider}\")\n\n        # Validate environment and get headers\n        headers = extra_headers or {}\n        headers = evals_api_provider_config.validate_environment(headers=headers, litellm_params=litellm_params)\n\n        # Transform request\n        api_base: Final = litellm_params.api_base or DEFAULT_OPENAI_API_BASE\n        url, headers = evals_api_provider_config.transform_delete_eval_request(\n            eval_id=eval_id,\n            api_base=api_base,\n            litellm_params=litellm_params,\n            headers=headers,\n        )\n\n        # Pre-call logging\n        litellm_logging_obj.update_from_kwargs(\n            kwargs=kwargs,\n            model=None,","sourceCodeStart":866,"sourceCodeEnd":902,"githubUrl":"https://github.com/BerriAI/litellm/blob/6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d/litellm/evals/main.py#L866-L902","documentation":"Raised in litellm.evals.delete_eval (litellm/evals/main.py:884) when get_provider_evals_api_config returns None for the given provider. Only LlmProviders.OPENAI has an Evals config, so DELETE operations via litellm.evals are OpenAI-only; anything else fails before headers/URL transformation.","triggerScenarios":"Calling litellm.evals.delete_eval(eval_id=..., custom_llm_provider='azure'|'anthropic'|'vertex_ai'|...); cleanup scripts parameterized by provider that pass a non-OpenAI value.","commonSituations":"Automated teardown scripts iterating over providers; porting eval lifecycle management from the OpenAI SDK to LiteLLM with a different provider configured.","solutions":["Use custom_llm_provider='openai' or omit the argument for delete_eval","Delete evals through the provider's own API when not using OpenAI","Add a preflight check in cleanup tooling that skips non-OpenAI providers for eval deletion"],"exampleFix":"# before\nlitellm.evals.delete_eval(eval_id=\"eval_123\", custom_llm_provider=\"bedrock\")\n\n# after\nlitellm.evals.delete_eval(eval_id=\"eval_123\", custom_llm_provider=\"openai\")","handlingStrategy":"validation","validationCode":"if custom_llm_provider != \"openai\":\n    logger.warning(\"skipping eval deletion for unsupported provider %s\", custom_llm_provider)\nelse:\n    litellm.evals.delete_eval(eval_id=eval_id, custom_llm_provider=\"openai\")","typeGuard":"def evals_provider_supported(provider: str) -> bool:\n    return provider == \"openai\"","tryCatchPattern":"try:\n    litellm.evals.delete_eval(eval_id=eval_id)\nexcept ValueError as e:\n    if \"DELETE eval is not supported\" in str(e):\n        raise UnsupportedProviderError(\"eval deletion is OpenAI-only\")","preventionTips":["Skip delete ops for non-OpenAI providers in teardown scripts instead of calling through","Use a single provider allowlist check across all eval lifecycle calls","Keep deletion idempotent so partial cleanup can be re-run"],"tags":["evals","provider-support","openai","validation","deletion"],"backgroundTag":null,"analyzedSha":"6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d","analyzedAt":"2026-08-15T07:12:03.035Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}