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Deepseek v4 Pro seems to be returning errors in build mode - reasoning_content in the thinking mode must be passed back to the API #24203
Description
Description
Using Deepseek v4 Pro, via Open Router.
It's working fine in plan mode. When triggering build mode with the plan it generated, keep getting the error:
Plugins
No response
OpenCode version
1.14.24
Steps to reproduce
Setup OpenRouter with DeepSeek v4, create a plan, execute plan
Screenshot and/or share link
Attached above
Operating System
MacOS
Terminal
Ghostty
Activity
[-]Deepseek v4 Pro seems to be returning errors in build mode[/-][+]Deepseek v4 Pro seems to be returning errors in build mode - `reasoning_content` in the thinking mode must be passed back to the API[/+]github-actions commentedon Apr 24, 2026
This issue might be a duplicate of an existing issue. Please check:
reasoning_contentis not being round-tripped in multi-turn tool call history, causing a 400 error on subsequent turns. That issue includes a detailed root cause analysis and reproduction steps for the same error message you're seeing.rekram1-node commentedon Apr 24, 2026
Update opencode it's been fixed
Avanatiker commentedon Apr 25, 2026
@rekram1-node i have the same issue as the guy and tried with latest release and latest commit on dev branch.
rekram1-node commentedon Apr 25, 2026
looks like OR fix was missed yeah ill get to that
fix(provider): complete DeepSeek reasoning_content round-trip for mul…