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  "path": "/t/chatgpt-5-4-pro-standard-mode-adaptive-thinking-or-nerfing-model/1379265#post_15",
  "publishedAt": "2026-04-22T15:42:08.000Z",
  "site": "https://community.openai.com",
  "textContent": "Just wanted to add that I have also been experiencing a significant regression of the pro models. Thinking time is the most obvious signal, but as the previous users have said, I have also noticed significant decline in model performance.\n\nFor me, my usage is mostly in mathematics, and I have noticed much more common misunderstandings and hallucinations in my usage. This is concerning because the pro subscription is costly and I am currently not getting the performance that justifies the cost.\n\nHopefully this gets resolved soon.",
  "title": "ChatGPT 5.4 Pro Standard Mode - Adaptive Thinking or Nerfing Model?"
}