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OpenAI brings GPT-4o back as a default for all paying ChatGPT users, Altman promises ‘plenty of notice’ if it leaves again
For now, the changes should help placate users who felt frustrated by the sudden shift to GPT-5 and deprecation of OpenAI's older LLMs.
Turning energy into a strategic advantage Architecting efficient inference for real throughput gains Unlocking competitive ROI with sustainable AI systems Altman also hinted at another change on the horizon: a personality tweak for GPT-5 intended to feel “warmer” than the current default, but less polarizing than GPT-4o’s tone. The company is exploring per-user customization as a long-term solution — a move that could address the strong emotional attachments some users have formed with specific models.
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