UiPath LLM Client [v1.19.0]

[1.19.0] - 2026-09-09

Added

• UiPathHttpxClient / UiPathHttpxAsyncClient now capture the per-request dollar cost the LLM Gateway reports for opted-in calls instead of dropping it. When a request carries X-UiPath-LlmGateway-IncludeAssociatedDollarCost: true (Passthrough API only), the value is exposed via uipath.llm_client.utils.dollar_cost.get_captured_dollar_cost() for the duration of the calling context. Non-streaming JSON responses are read from the top-level associated_dollar_cost field. Streaming responses are wrapped so the trailing frame the gateway appends after the vendor's terminal event — an SSE data: {"associated_dollar_cost": ...} event, or a costMetadata message on AWS event streams (Bedrock) — is picked up once the consumer finishes reading (including when the vendor SDK stops at data: [DONE] and closes the response without reading further). None means "not priced" and must never be read as $0; when a cost was requested but could not be read (compressed stream, lost event-stream framing, non-numeric value) a warning is logged so the gap is visible. Known residual: the gateway's SSE frame also reaches google-genai as a candidate-less chunk, so opted-in Gemini streams log langchain-google-genai's "Gemini produced an empty response" warning; the cost is still captured.