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OpenAI returns old models to ChatGPT as Sam Altman admits ‘bumpy’ GPT-5 rollout
The pressure is on for OpenAI to prove that GPT-5 isn’t just an incremental update, but a true step forward.
OpenAI co-founder and CEO Sam Altman is publicly acknowledging major hiccups in yesterday’s rollout of GPT-5, the company’s new, flagship large language model (LLM) — advertised as its most powerful and capable yet. Turning energy into a strategic advantage Architecting efficient inference for real throughput gains Unlocking competitive ROI with sustainable AI systems Developer feedback hasn’t been much better, with users posting images of GPT faring worse at “one-shot” certain programming tasks — completing them well with a single-prompt — compared to rival AI lab Anthropic’s new model Claude Opus 4.1.
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