Description

Hi Spring AI team,

I am integrating Doubao (Volcengine) models via their OpenAI-compatible endpoint. The API accepts a non-standard parameter in the request body, for example:

{
  "model": "doubao-seed-1-6-250615",
  "messages": [
    {
      "role": "user",
      "content": [
        { "type": "text", "text": "研究深度思考模型与非深度思考模型区别" }
      ]
    }
  ],
  "thinking": { "type": "disabled" }
}

Currently in Spring AI:

  • ChatClient only accepts a Prompt plus *ChatOptions (OpenAiChatOptions, AzureOpenAiChatOptions, etc.).
  • There doesn’t seem to be a way to pass arbitrary JSON fields like thinking into the request body.
  • Older issues/PRs mentioned extra_body or customOptions, but in 1.0.x API these methods are not exposed.

Question

Is there currently a recommended way to add custom request options for provider-specific fields (like thinking for Doubao, or any other vendor extension)?

  • Should I implement my own ChatModel wrapper to inject the field?
  • Or is there a plan to support extraBody / customOptions in the official *ChatOptions classes?

Expected Behavior

Ability to do something like:

Prompt prompt = new Prompt(
    "my user question",
    OpenAiChatOptions.builder()
        .model("doubao-seed-1-6-250615")
        .extraBody(Map.of("thinking", Map.of("type", "disabled")))
        .build()
);

which would serialize into the request body as expected.

Environment

  • Spring AI version: 1.0.1
  • Using Doubao (Volcengine) via OpenAI-compatible API

Would love guidance on whether this is already possible, and if not, whether support for extraBody/customOptions is planned. Thanks!

Comment From: Cyclones-Y

I had the same problem as you. Could you tell me if you have solved it?