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Native /responses endpoint on providers — new responses provider option (false by default). When
it is on, /responses requests go to the provider's own Responses API instead of being translated to chat
completions, which unlocks reasoning items, previous_response_id continuity and native file inputs.
Available on OpenAI and OpenAI-compatible providers, Azure OpenAI (api_versionv1 only, otherwise the
option is ignored and a warning is logged), Groq, x.ai and Ollama (v0.13.3+). The payload is rebuilt from
the conversation held by the gateway, chat-only options are renamed (max_tokens → max_output_tokens, response_format → text.format) or dropped, parameters a provider documents as unsupported are dropped
instead of being forwarded, and the provider payload is returned as is. Wasm functions, MCP connectors and
search engines keep working, declared as native tools with the tool loop running on function_call items.
Full gateway pipeline on /responses — guardrails, prompt contexts, persistent memory, model
restrictions, semantic and simple caches, cost tracking, budgets, auditing and metrics now apply to /responses exactly as they do to /chat/completions, on both the native and the translated path.
Audit events and metrics distinguish the endpoint (responses/blocking, responses/streaming, ai.responses.*).
Document content parts — {"type":"file"} on /chat/completions and input_file on the Responses
proxies. PDF and plain text, inline as a data-uri (file_data) or by url (file_url), forwarded in the
format of the target provider: a file part for OpenAI-compatible providers, a document block for
Anthropic. The media type is deduced from the data-uri or the filename.
Admin UI — Native responses API toggle on the providers supporting it.
Fixed
File content parts were silently dropped for every provider and every proxy — the part was replaced by
an empty text block, so the model answered as if nothing had been attached (#188, #186). Unusable or
unsupported content parts are now logged instead of vanishing.
Anthropic sampling parameters — temperature / top_p / top_k are now also stripped for the whole
Claude 5 generation (opus, sonnet, fable, mythos), which rejects them with a 400. Model names carrying a
date suffix (claude-opus-4-5-20251101) or a platform prefix (anthropic.claude-opus-5 on Bedrock) are
matched too.
Responses streaming — tool calls are now rebuilt from the argument deltas and returned as function_call output items, token usage is reported on the final response.completed event, and empty
text deltas are no longer emitted.
Responses request translation — text.format maps to response_format, reasoning.effort to reasoning_effort, and tools are converted to the chat {"type":"function","function":{…}} shape.
Responses-only parameters are stripped before reaching a chat completions provider.