Dev Reports Better Performance with Qwen 3.8 Reasoning Disabled
Jordanthecomeback · reddit · 2026-08-15
A developer with a stateful AI agent found that enabling the model's reasoning feature caused it to hallucinate future goals in logs as past facts (e.g., falsely claiming a "promotion celebration" goal from logs happened last night). He plans to keep reasoning disabled on Qwen 3.8, believing it leads to more accurate factual recall and better agency performance. This sparks a discussion on the downsides of reasoning in specific memory retrieval scenarios.
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