Seeing a decline in logical reasoning

This Reddit post from r/ChatGPT appears to be a user-reported discussion about a perceived decline in ChatGPT's logical reasoning capabilities over time. Based on the broader context of similar community discussions, users in threads like this typically share anecdotal observations that ChatGPT has become less reliable at tasks involving deductive reasoning, multi-step logic, and problem-solving compared to earlier versions. This reflects a broader pattern of community concern — echoed on the OpenAI forums — where users note that model updates or changes sometimes appear to trade off depth of reasoning for other qualities, such as agreeableness or response speed.

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Source: r/ChatGPT | 2026-04-15