When using deepseek with openai-response in the Codex app, an error is encountered: #1594

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1. lusile2024

   added

   bugSomething isn't workingSomething isn't working

   on Aug 13, 2026
2. github-actions

   added

   proxyHTTP proxy, routing, reverse-proxy / management authHTTP proxy, routing, reverse-proxy / management auth

   on Aug 13, 2026
3. coderabbitai commented on Aug 13, 2026

   

   coderabbitaibot

   on Aug 13, 2026 – with coderabbitai

   Contributor

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   ⚠️ Possible Duplicate Issue(s)

   • [Bug] DeepSeek V4 Flash Responses multi-tool continuation fails with reasoning_text 400 on 2.12.0 #1534

   🔗 Related PRs

   #906 - fix(deepseek): preserve Responses reasoning replay on continuations (#875) [open]
   #1499 - fix(deepseek): keep parallel reasoning replay on continuation [open]

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4. lidge-jun commented on Aug 14, 2026

   

   lidge-jun

   on Aug 14, 2026

   Owner

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   Closing as needs-info — diagnosing this requires a redacted wire capture showing the actual request/response exchange with the DeepSeek provider. If you can provide the capture (with secrets redacted), please reopen. 재현을 위한 wire capture가 필요하며, 현재 정보만으로는 진단이 어렵습니다.
5. lidge-jun

   closed this as not plannedon Aug 14, 2026
6. chenli1989 commented on Aug 14, 2026

   

   chenli1989

   on Aug 14, 2026

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   @lusile2024 I encountered the same issue, and the following solution worked for me:
   Adding the preserveResponsesReasoningContent property and enabling it within the configuration for the relevant provider resolves the issue. I hope this helps.