openrouter-python-sdk-retry-errors/docs/sdks/chat/README.md

Chat

(chat)

Overview

Available Operations

• send - Create a chat completion

send

Sends a request for a model response for the given chat conversation. Supports both streaming and non-streaming modes.

Example Usage

from openrouter import OpenRouter
import os


with OpenRouter(
    api_key=os.getenv("OPENROUTER_API_KEY", ""),
) as open_router:

    res = open_router.chat.send(messages=[], stream=False)

    with res as event_stream:
        for event in event_stream:
            # handle event
            print(event, flush=True)

Parameters

Parameter	Type	Required	Description
messages	List[components.Message]	✔️	N/A
provider	OptionalNullable[components.ChatGenerationParamsProvider]	➖	When multiple model providers are available, optionally indicate your routing preference.
plugins	List[components.ChatGenerationParamsPluginUnion]	➖	Plugins you want to enable for this request, including their settings.
route	OptionalNullable[components.ChatGenerationParamsRoute]	➖	Routing strategy for multiple models: "fallback" (default) uses secondary models as backups, "sort" sorts all endpoints together by routing criteria.
user	Optional[str]	➖	N/A
session_id	Optional[str]	➖	A unique identifier for grouping related requests (e.g., a conversation or agent workflow) for observability. If provided in both the request body and the x-session-id header, the body value takes precedence. Maximum of 128 characters.
model	Optional[str]	➖	N/A
models	List[str]	➖	N/A
frequency_penalty	OptionalNullable[float]	➖	N/A
logit_bias	Dict[str, float]	➖	N/A
logprobs	OptionalNullable[bool]	➖	N/A
top_logprobs	OptionalNullable[float]	➖	N/A
max_completion_tokens	OptionalNullable[float]	➖	N/A
max_tokens	OptionalNullable[float]	➖	N/A
metadata	Dict[str, str]	➖	N/A
presence_penalty	OptionalNullable[float]	➖	N/A
reasoning	Optional[components.Reasoning]	➖	N/A
response_format	Optional[components.ChatGenerationParamsResponseFormatUnion]	➖	N/A
seed	OptionalNullable[int]	➖	N/A
stop	OptionalNullable[components.ChatGenerationParamsStop]	➖	N/A
stream	Optional[bool]	➖	N/A
stream_options	OptionalNullable[components.ChatStreamOptions]	➖	N/A
temperature	OptionalNullable[float]	➖	N/A
tool_choice	Optional[Any]	➖	N/A
tools	List[components.ToolDefinitionJSON]	➖	N/A
top_p	OptionalNullable[float]	➖	N/A
debug	Optional[components.Debug]	➖	N/A
retries	Optional[utils.RetryConfig]	➖	Configuration to override the default retry behavior of the client.

Response

operations.SendChatCompletionRequestResponse

Errors

Error Type	Status Code	Content Type
errors.ChatError	400, 401, 429	application/json
errors.ChatError	500	application/json
errors.OpenRouterDefaultError	4XX, 5XX	*/*