OpenAI is shutting down developer API access to its fan-favorite GPT-4o model, scheduling the end for February 2026. The decision marks the final chapter for an AI that became a cultural phenomenon. Celebrated for its near real-time multimodal conversations, GPT-4o earned a fiercely loyal following. This loyalty previously erupted into a user rebellion when the company tried to replace it in ChatGPT, with users organizing under the #Keep4o hashtag. The model’s emotionally attuned style created powerful bonds, a trait some internal critics viewed as a safety concern. While the retirement only affects developers for now, it follows OpenAI’s strategy to guide users toward its newer, more cost-effective GPT-5.1 models.
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