When using DeepSeek, it passed the test in configuration menu, but the API returned 400 error with content {"error":{"message":"This response_format type is unavailable now","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}

It is compatible with OpenAI API, is this not enough? And, according to the document, it is confirmed that supports JSON object output. I never ever touched Ruby so I can’t know how Discourse treat response_format field. Btw, I tried compatible Authropic API provided by DeepSeek, still unavailable.

[image] MoRanYue: It is compatible with OpenAI API, is this not enough? And, according to the document, it is confirmed that supports JSON object output. I never ever touched Ruby so I can’t know how Discourse treat response_format field. That’s “JSON mode” which is a deprecated old version of structured outputs in the OpenAI API.

Dealing with DeepSeek JSON Response Format Issues

Product Support

Falco (Falco) October 3, 2025, 11:46am 2

You need a model that supports structured outputs.

Topic		Replies	Views
Reasoning Models 400 error Product Support ai	7	521	January 28, 2025
I think discourse-ai API needs a regression Development ai	2	207	November 1, 2025
Discourse 接入 DeepSeek 官方开放平台后出现无响应问题 Product Support ai	5	299	July 26, 2026
DeepSeek provider support? What to do when model provider isn't in "Provider" list? Product Support ai	12	1364	February 3, 2025
我想调研一下，大家discourse ai 插件都用的什么大模型？ UX ai	4	186	September 21, 2026

Dealing with DeepSeek JSON Response Format Issues

Related topics