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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.
Answering user questions in a Reddit AMA (Ask Me Anything) thread and in a post on X this afternoon, Altman admitted to a range of issues that have disrupted the launch of GPT-5, including faulty model switching, poor performance, and user confusion — prompting OpenAI to partially walk back some of its platform changes and reinstate user access to earlier models like GPT-4o.
“It was a little more bumpy than we hoped for,” Altman wrote in reply to a question on Reddit regarding the big GPT-5 launch.
As for erroneous model performance charts shown off during OpenAI’s GPT-5 livestream, Altman said: “People were working late and were very tired, and human error got in the way. A lot comes together for a livestream in the last hours.”
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While he noted the accompanying blog post and system card were accurate, the missteps further muddied a launch already facing scrutiny from early users and developers.
GPT-5 rollout updates:
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