{"record":{"id":"2f96a0620cd7666a","repo":"BerriAI/litellm","slug":"parameter-k-is-not-supported-for-model-model-2f96a0","errorCode":null,"errorMessage":"Parameter {k} is not supported for model {model}. Supported parameters are {supported_params}. Set drop_params=True to drop unsupported parameters.","messagePattern":"Parameter (.+?) is not supported for model (.+?)\\. Supported parameters are (.+?)\\. Set drop_params=True to drop unsupported parameters\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"litellm/llms/openai/image_generation/dall_e_2_transformation.py","lineNumber":39,"sourceCode":"    def get_supported_openai_params(self, model: str) -> list[OpenAIImageGenerationOptionalParams]:\n        return [\"n\", \"response_format\", \"quality\", \"size\", \"user\"]\n\n    def map_openai_params(\n        self,\n        non_default_params: dict,\n        optional_params: dict,\n        model: str,\n        drop_params: bool,\n    ) -> dict:\n        supported_params: Final = self.get_supported_openai_params(model)\n        for k in non_default_params:\n            if k not in optional_params:\n                if k in supported_params:\n                    optional_params[k] = non_default_params[k]\n                elif drop_params:\n                    pass\n                else:\n                    raise ValueError(\n                        f\"Parameter {k} is not supported for model {model}. Supported parameters are {supported_params}. Set drop_params=True to drop unsupported parameters.\"\n                    )\n\n        return optional_params\n\n    def transform_image_generation_response(\n        self,\n        model: str,\n        raw_response: httpx.Response,\n        model_response: ImageResponse,\n        logging_obj: \"LiteLLMLoggingObj\",\n        request_data: dict,\n        optional_params: dict,\n        litellm_params: dict,\n        encoding: Any,\n        api_key: str | None = None,\n        json_mode: bool | None = None,\n    ) -> ImageResponse:","sourceCodeStart":21,"sourceCodeEnd":57,"githubUrl":"https://github.com/BerriAI/litellm/blob/6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d/litellm/llms/openai/image_generation/dall_e_2_transformation.py#L21-L57","documentation":"Error \"Parameter {k} is not supported for model {model}. Supported parameters are {supported_params}. Set drop_params=True to drop unsupported parameters.\" thrown in BerriAI/litellm.","triggerScenarios":"Thrown at litellm/llms/openai/image_generation/dall_e_2_transformation.py:39 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Remove the unsupported parameter for dall-e-2 or set drop_params=True."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"6c2dcb801bf2b75c18f1bb24140e7cf57465cc4d","analyzedAt":"2026-08-15T07:12:03.035Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}