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[Bug]: Opencode Zen v1.15.7 - DeepSeek HTTP 400 caused by missing reasoning_content #28890
Description
Description
RequestExecutor.execute: Provider request failed with HTTP 400: {"error":{"message":"Error from provider (DeepSeek): The reasoning_content in the thinking mode must be passed back to the API.","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}
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OpenCode version
1.15.7
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Operating System
Windows10
Terminal
Windows Terminal
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github-actions commentedon May 22, 2026
This issue might be a duplicate of existing issues. Please check:
reasoning_contentmissing on session continuation, with root cause analysis and a workaroundreasoning_contentnot passed back for tool call turns, causing 400 errorsreasoning_content400 error persists on v1.14.31Please review those issues before continuing here.