Deepseek missing "reasoning_content" field ; deepseek_reasoner model erroring out #3281

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opened 2026-02-16 17:39:29 -05:00 by yindo · 2 comments
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Originally created by @Rishirandhawa on GitHub (Dec 3, 2025).

Description

When chatting with deepseek_reasoner model with deepseek provider getting error -

Missing reasoning_content field in the assistant message at message index 3. For more information, please refer to https://api-docs.deepseek.com/guides/thinking_mode#tool-calls

OpenCode version

latest

Steps to reproduce

  1. Just write anyting to deepseek_reasoner model using deepseek as provider

Screenshot and/or share link

No response

Operating System

macOS

Terminal

WezTerm

Originally created by @Rishirandhawa on GitHub (Dec 3, 2025). ### Description When chatting with deepseek_reasoner model with deepseek provider getting error - Missing `reasoning_content` field in the assistant message at message index 3. For more information, please refer to https://api-docs.deepseek.com/guides/thinking_mode#tool-calls ### OpenCode version latest ### Steps to reproduce 1. Just write anyting to deepseek_reasoner model using deepseek as provider ### Screenshot and/or share link _No response_ ### Operating System macOS ### Terminal WezTerm
yindo added the bug label 2026-02-16 17:39:29 -05:00
yindo closed this issue 2026-02-16 17:39:29 -05:00
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Owner

@github-actions[bot] commented on GitHub (Dec 3, 2025):

This issue might be a duplicate of existing issues. Please check:

  • #4947: DeepSeek 3.2: Missing reasoning_content

Feel free to ignore if this addresses your specific case.

@github-actions[bot] commented on GitHub (Dec 3, 2025): This issue might be a duplicate of existing issues. Please check: - #4947: DeepSeek 3.2: Missing `reasoning_content` Feel free to ignore if this addresses your specific case.
Author
Owner

@rekram1-node commented on GitHub (Dec 3, 2025):

Dup of #4947 fix is releasing rn

@rekram1-node commented on GitHub (Dec 3, 2025): Dup of #4947 fix is releasing rn
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Reference: anomalyco/opencode#3281