{"record":{"id":"ce92963d600199b4","repo":"microsoft/autogen","slug":"model-is-required-for-openaichatcompletionclient","errorCode":null,"errorMessage":"model is required for OpenAIChatCompletionClient","messagePattern":"model is required for OpenAIChatCompletionClient","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"critical","filePath":"python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py","lineNumber":1443,"sourceCode":"\n            config = {\n                \"provider\": \"OpenAIChatCompletionClient\",\n                \"config\": {\"model\": \"gpt-4o\", \"api_key\": \"REPLACE_WITH_YOUR_API_KEY\"},\n            }\n\n            client = ChatCompletionClient.load_component(config)\n\n        To view the full list of available configuration options, see the :py:class:`OpenAIClientConfigurationConfigModel` class.\n\n    \"\"\"\n\n    component_type = \"model\"\n    component_config_schema = OpenAIClientConfigurationConfigModel\n    component_provider_override = \"autogen_ext.models.openai.OpenAIChatCompletionClient\"\n\n    def __init__(self, **kwargs: Unpack[OpenAIClientConfiguration]):\n        if \"model\" not in kwargs:\n            raise ValueError(\"model is required for OpenAIChatCompletionClient\")\n\n        model_capabilities: Optional[ModelCapabilities] = None  # type: ignore\n        self._raw_config: Dict[str, Any] = dict(kwargs).copy()\n        copied_args = dict(kwargs).copy()\n\n        if \"model_capabilities\" in kwargs:\n            model_capabilities = kwargs[\"model_capabilities\"]\n            del copied_args[\"model_capabilities\"]\n\n        model_info: Optional[ModelInfo] = None\n        if \"model_info\" in kwargs:\n            model_info = kwargs[\"model_info\"]\n            del copied_args[\"model_info\"]\n\n        add_name_prefixes: bool = False\n        if \"add_name_prefixes\" in kwargs:\n            add_name_prefixes = kwargs[\"add_name_prefixes\"]\n","sourceCodeStart":1425,"sourceCodeEnd":1461,"githubUrl":"https://github.com/microsoft/autogen/blob/027ecf0a379bcc1d09956d46d12d44a3ad9cee14/python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py#L1425-L1461","documentation":"Thrown by the OpenAIChatCompletionClient constructor when the kwargs do not include a 'model' key. The model identifier is mandatory for capability resolution, token counting, and request construction, and it also serves as the component-serialization key, so the constructor fails fast without it.","triggerScenarios":"Constructing OpenAIChatCompletionClient() with no arguments, or with only api_key/azure settings and no model; deserializing a component config whose dict lacks 'model'; typos like model_name= instead of model=.","commonSituations":"Loading client config from a dict/YAML where the model key was omitted or misspelled; Azure setups where users assume azure_deployment replaces model; programmatic config assembly that conditionally sets model and skips it.","solutions":["Pass model=\"...\" explicitly to the constructor","Check for misspelled keys such as model_name or deployment_name being used instead of model","For Azure, pass model (the deployment's underlying model name) alongside azure_deployment","Validate config dicts contain 'model' before component_config loading"],"exampleFix":"# before\nclient = OpenAIChatCompletionClient(api_key=KEY)  # ValueError\n\n# after\nclient = OpenAIChatCompletionClient(model=\"gpt-4o-2024-08-06\", api_key=KEY)","handlingStrategy":"validation","validationCode":"config = {\"api_key\": KEY, ...}\nif \"model\" not in config:\n    raise KeyError(\"client config missing required 'model' key\")\nclient = OpenAIChatCompletionClient(**config)","typeGuard":"def is_valid_client_config(config: dict) -> bool:\n    return isinstance(config, dict) and isinstance(config.get(\"model\"), str) and bool(config[\"model\"])","tryCatchPattern":"try:\n    client = OpenAIChatCompletionClient(**config)\nexcept ValueError as e:\n    if \"model is required\" in str(e):\n        raise ConfigError(f\"missing 'model' in client config: {sorted(config)}\") from e\n    raise","preventionTips":["Validate config dicts for a non-empty 'model' string before constructing clients","Load client configs from typed settings models (pydantic) with model as a required field","Watch for misspellings: model_name / deployment_name are not accepted substitutes"],"tags":["openai","constructor","configuration","required-parameter"],"backgroundTag":null,"analyzedSha":"027ecf0a379bcc1d09956d46d12d44a3ad9cee14","analyzedAt":"2026-08-15T03:38:00.719Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}