[Model] deepseek-v4-flash repeatedly emits the meaningless token "curd" in long tool-calling sessions (Claude Code CLI + Go plan) #43638

Activity

1. github-actions commented on Aug 20, 2026

   

   github-actionsBot

   on Aug 20, 2026 – with GitHub Actions

   Contributor

   More actions

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

   • [OpenCode Go] DeepSeek V4 Flash intermittently degenerates into gibberish #43181: DeepSeek V4 Flash intermittently degenerates into gibberish via the OpenCode Go route — same model, same provider path, similar long-context degeneration behavior (yours is repetition of a single token "curd"; that one is multilingual gibberish, but the root cause may be the same)
   • deepseek flash v4 (opencode go) is broken. #43146: deepseek-v4-flash (OpenCode Go) is broken — also describes a repetition loop with the same output
2. prathamesh-gharat commented on Oct 18, 2026

   

   prathamesh-gharat

   on Oct 18, 2026

   More actions

   I had this issue several times to the point the entire opencode CLI stopped responding for more than 10 minutes when I tried to load the session after several restarts, disk usage was negligible, memory usage was negligible, cpu usage was between 5-13% for the opencode nodejs process.

   I suspected it was due to the large "Let me run.\n\n" output.

   I ended up using the following script to clean it up in the latest version of opencode that uses the "session_message" table.

   Have to replace your YOUR_SESSION_ID in two places below. Best to create a backup copy of your %USERPROFILE%\.local\share\opencode\opencode.db and %USERPROFILE%\.local\share\opencode\opencode.db-wal before proceeding.

   WITH RECURSIVE fixed(id, txt) AS (
       SELECT id, data
       FROM session_message
       WHERE session_id = 'YOUR_SESSION_ID'
         AND instr(data, '\n\nLet me run.\n\nLet me run.') > 0
   
       UNION ALL
   
       SELECT id,
              replace(
                  txt,
                  '\n\nLet me run.\n\nLet me run.',
                  '\n\nLet me run.'
              )
       FROM fixed
       WHERE instr(txt, '\n\nLet me run.\n\nLet me run.') > 0
   )
   UPDATE session_message
   SET data = (
       SELECT txt
       FROM fixed
       WHERE fixed.id = session_message.id
         AND instr(txt, '\n\nLet me run.\n\nLet me run.') = 0
   )
   WHERE session_id = 'YOUR_SESSION_ID'
     AND instr(data, '\n\nLet me run.\n\nLet me run.') > 0;
   
3. neriousy commented on Oct 21, 2026

   

   neriousy

   on Oct 21, 2026

   Member

   More actions

   Thanks for the report. This is about how the model itself behaves when served through OpenCode Go (repeating itself, broken tool calls, speed, or rejecting large requests), not a bug in the OpenCode app. We pass these reports to our upstream providers. Starting a new session or running /compact usually helps with loops and oversized-request errors. Closing this to keep the tracker focused; the main discussion is in #50206.
4. neriousy

   closed this as not plannedon Oct 21, 2026