Compatibility with DeepSeek model's design to return reasoning content after tool calls?

Ideas Feature Requests
31

same question, please fix it as soon as possible

32

input tokens:1M,Output tokens:386K
From this perspective, the advantage of DeepSeek is considerable.

33

why ide model can’t use ds v4 but agent window can?

34

same question

35

custom model deepseek-v4-flash/pro,Provider returned error: {“error”:{“message”:“The reasoning_content in the thinking mode must be passed back to the API.”,“type”:“invalid_request_error”,“param”:null,“code”:“invalid_request_error”}},please fix this error :joy:

36

我用这个方法解决了

38

same request

39

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

deepseek v4 error report

Provider returned error: {“error”:{“message”:“The reasoning_content in the thinking mode must be passed back to the API.”,“type”:“invalid_request_error”,“param”:null,“code”:“invalid_request_error”}} Request ID: b01fb6e9-b07d-4bcb-b438-36c29312af2d

Steps to Reproduce

Using the model: deepseek-v4-pro

Operating System

MacOS

Version Information

Version: 3.2.11
VSCode Version: 1.105.1
Commit: e9ee1339915a927dfb2df4a836dd9c8337e17cc0
Date: 2026-04-24T14:36:47.933Z
Layout: glass
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.4.0

Does this stop you from using Cursor

Yes - Cursor is unusable

40

Do please tracking and solve this problem. I’m a cursor pro+ subscrpiber, I would appreciate you very much!:hugs::hugs:

41

please fix this feature, I’m seeing this error with mimo-v2.5-pro model

42

thanks

43

+ same issue with mimo-v2.5-pro

44

same request

47

same request

48

Same request!

I expect cursor can be compatible with deepseek-v4-pro earlier

49

same question with deepseek-v4-flash

50

I am encountering the same problem. Could you please release an update at your earliest convenience?

51

@KennyHuang2018 @leoren @Baisong @LucasYang @cbyzzy there is an existing workaround, check GitHub - yxlao/deepseek-cursor-proxy: Fixes missing reasoning_content for DeepSeek V4 · GitHub

53

Deepseek is not the worse one, tell me you know nothing about how to use AI “based on benchmarks” :clown_face: . They have models compatible that are proven to be much worse then DeepSeek V4, which is also 50x cheaper then most models.

55

gotcha, will be switching from Cursor and I am pro+ subscriber since you will not support a model that just cut the cost by 75% making it one of the best and cheapest models out there.