> ## Documentation Index > Fetch the complete documentation index at: https://agno-v2-service-account.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Open Responses Base class for interacting with providers that implement the [Open Responses API specification](https://openresponses.org). This provides a foundation for multi-provider, interoperable LLM interfaces based on the OpenAI Responses API. Providers that implement this spec include Ollama (v0.13.3+) and OpenRouter. Provider reference pages document only their own defaults and additions. Every parameter below is available on all of them. ## Key Differences from OpenAI Responses * Configurable `base_url` for pointing to different API endpoints * Stateless by default (no `previous_response_id` chaining) * Flexible `api_key` handling for providers that don't require authentication ## Parameters | Parameter | Type | Default | Description | | ------------------------------------ | --------------------- | ----------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | | `id` | `str` | `"not-provided"` | The ID of the model to use | | `name` | `str` | `"OpenResponses"` | The name of the model | | `provider` | `str` | `"OpenResponses"` | The provider of the model | | `model_type` | `ModelType` | `ModelType.MODEL` | Functional role of the model (e.g. `MODEL`, `OUTPUT_MODEL`, `PARSER_MODEL`, `MEMORY_MODEL`). Set by the agent during initialization | | `supports_native_structured_outputs` | `bool` | `True` | Whether the model supports native structured outputs | | `supports_json_schema_outputs` | `bool` | `False` | Whether the model requires a JSON schema for structured outputs | | `system_prompt` | `Optional[str]` | `None` | System prompt from the model, added to the Agent | | `instructions` | `Optional[List[str]]` | `None` | Instructions from the model, added to the Agent | | `tool_message_role` | `str` | `"tool"` | Role assigned to tool messages | | `assistant_message_role` | `str` | `"assistant"` | Role assigned to assistant messages | | `role_map` | `Dict[str, str]` | `{"system": "developer", "user": "user", "assistant": "assistant", "tool": "tool"}` | Mapping of message roles to provider roles | | `vector_store_name` | `str` | `"knowledge_base"` | Name of the vector store used by the file search built-in tool | ### Request parameters | Parameter | Type | Default | Description | | -------------------------- | ---------------------------------------------------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- | | `include` | `Optional[List[str]]` | `None` | Additional output data to include in the response (e.g. `"reasoning.encrypted_content"`) | | `max_output_tokens` | `Optional[int]` | `None` | Maximum number of output tokens to generate, including reasoning tokens | | `max_tool_calls` | `Optional[int]` | `None` | Maximum number of built-in tool calls during the response | | `metadata` | `Optional[Dict[str, Any]]` | `None` | Developer-defined metadata to associate with the response | | `parallel_tool_calls` | `Optional[bool]` | `None` | Whether the model can run tool calls in parallel | | `reasoning` | `Optional[Dict[str, Any]]` | `None` | Reasoning configuration (e.g. `{"enabled": True}`) | | `verbosity` | `Optional[Literal["low", "medium", "high"]]` | `None` | Verbosity level of the model response | | `reasoning_effort` | `Optional[Literal["minimal", "low", "medium", "high"]]` | `None` | Reasoning effort for reasoning models | | `reasoning_summary` | `Optional[Literal["auto", "concise", "detailed"]]` | `None` | Level of detail for reasoning summaries | | `store` | `Optional[bool]` | `False` | Whether to store the response on the provider side. Disabled by default for compatible providers | | `temperature` | `Optional[float]` | `None` | Controls randomness in the model's output | | `top_p` | `Optional[float]` | `None` | Controls diversity via nucleus sampling | | `truncation` | `Optional[Literal["auto", "disabled"]]` | `None` | Truncation strategy when the context window is exceeded | | `user` | `Optional[str]` | `None` | A unique identifier representing your end-user | | `service_tier` | `Optional[Literal["auto", "default", "flex", "priority"]]` | `None` | Processing tier for the request | | `strict_output` | `bool` | `True` | Guarantees schema adherence for structured outputs. When `False`, the schema is followed as a guide and output may deviate | | `background` | `Optional[bool]` | `None` | Enables background mode for long-running tasks. The API returns immediately and the response is polled until completion. Not supported for streaming | | `background_poll_interval` | `float` | `2.0` | Interval in seconds between polling attempts in background mode | | `background_max_wait` | `float` | `600.0` | Maximum time in seconds to wait for a background response before cancelling it and raising an error | | `extra_headers` | `Optional[Any]` | `None` | Additional headers to include in requests | | `extra_query` | `Optional[Any]` | `None` | Additional query parameters to include in requests | | `extra_body` | `Optional[Any]` | `None` | Additional body parameters to include in requests | | `request_params` | `Optional[Dict[str, Any]]` | `None` | Additional parameters merged into the request | ### Client parameters | Parameter | Type | Default | Description | | ----------------- | -------------------------------------------------- | ---------------- | ---------------------------------------------------------- | | `api_key` | `Optional[str]` | `"not-provided"` | The API key for authentication | | `organization` | `Optional[str]` | `None` | The organization ID to use for requests | | `base_url` | `Optional[Union[str, httpx.URL]]` | `None` | The base URL of the Responses API endpoint | | `timeout` | `Optional[float]` | `None` | Request timeout in seconds | | `max_retries` | `Optional[int]` | `None` | Maximum number of client-level retries for failed requests | | `default_headers` | `Optional[Dict[str, str]]` | `None` | Default headers to include in all requests | | `default_query` | `Optional[Dict[str, str]]` | `None` | Default query parameters to include in all requests | | `http_client` | `Optional[Union[httpx.Client, httpx.AsyncClient]]` | `None` | HTTP client instance for making requests | | `client_params` | `Optional[Dict[str, Any]]` | `None` | Additional parameters for client configuration | | `client` | `Optional[OpenAI]` | `None` | Pre-configured sync OpenAI client, reused across requests | | `async_client` | `Optional[AsyncOpenAI]` | `None` | Pre-configured async OpenAI client, reused across requests | ### Caching parameters | Parameter | Type | Default | Description | | ---------------- | --------------- | ------- | ---------------------------------------------------------------------------------- | | `cache_response` | `bool` | `False` | Cache model responses to avoid redundant API calls during development | | `cache_ttl` | `Optional[int]` | `None` | Time-to-live for cached responses, in seconds. `None` keeps cached entries forever | | `cache_dir` | `Optional[str]` | `None` | Directory for cached responses. Defaults to `~/.agno/cache/model_responses` | ### Retry parameters | Parameter | Type | Default | Description | | --------------------------- | ------ | ------- | -------------------------------------------------------------------------------------------------------------- | | `retries` | `int` | `0` | Number of retries to attempt before raising a ModelProviderError | | `delay_between_retries` | `int` | `1` | Delay between retries, in seconds | | `exponential_backoff` | `bool` | `False` | If True, the delay between retries is doubled each time | | `retry_with_guidance` | `bool` | `True` | Retry a failed invocation with a guidance message appended, for known errors avoidable with extra instructions | | `retry_with_guidance_limit` | `int` | `1` | Maximum number of retries with guidance | ## Usage For most use cases, prefer the provider-specific classes: * [OllamaResponses](/reference/models/ollama-responses) for Ollama * [OpenRouterResponses](/reference/models/openrouter-responses) for OpenRouter ```python theme={null} from agno.agent import Agent from agno.models.openai import OpenResponses agent = Agent( model=OpenResponses( id="your-model-id", base_url="https://your-provider.com/v1", api_key="your-api-key", ), ) agent.print_response("Hello!") ```