OpenAI Chat Completions

ProxAI uses the protocol name openai_chat_completions for the OpenAI Chat Completions API.

Protocol value

openai_chat_completions

Request path

/v1/chat/completions

Main code areas

src/protocol/openai/chat_completions/wiresrc/protocol/openai/chat_completions/requestsrc/protocol/openai/chat_completions/responsesrc/provider/openai/chat_completions

Conversion targets

pass-through selfanthropic_messages

Model

Chat Completions is choice/message oriented:

response
└─ choices[]
   └─ message or delta
      ├─ content
      └─ tool_calls[]

Tool calls are identified by their tool_calls[].index during streaming, which differs from Responses output item identifiers.

Request handling

Ingress validates the chat request shape, extracts routing fields such as model and stream, and forwards or translates the payload depending on the selected provider protocol.

Streaming

Chat streaming chunks are comparatively loose: each chunk carries a delta for a choice and may contain partial content or partial tool-call arguments.

For cross-protocol identifier rules, see Protocol Conversion.