OpenAI’s new frontier models mark a huge change in how AI will be built

I test-drove both. Here’s what I learned. In early March, OpenAI unleashed a one-two punch, dropping two major frontier models just days apart.
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Mixpanel breach compromises some OpenAI API users’ account data

A breach at data analytics provider Mixpanel Inc. has compromised the account information of some OpenAI Group PBC users. The ChatGPT developer disclosed the incident on Wednesday. Mixpanel’s namesake analytics platform enables companies to collect data ...

OpenAI releases GPT-5.4 mini and nano, its ‘most capable small models yet’

OpenAI continues to ship new models with the release of GPT-5.4 mini and nano, its “most capable small models yet.” ChatGPT users can start using GPT-5.4 mini today. These flavors of GPT-5.4 are designed to be fast and efficient for high-volume workloads, according to OpenAI.

OpenAI is shutting down its Sora video generation app

OpenAI is shutting down its Sora video generation app. "We're saying goodbye to Sora," the company wrote in a X post published Tuesday afternoon. For now, OpenAI has yet to say when the app and its related API service would become unavailable.
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OpenAI launches GPT-5.4 with computer vision, tool use enhancements

OpenAI Group PBC today launched a new large language model that it says is more adept at automating work tasks than its earlier algorithms. GPT-5.4 is available in ChatGPT, the Codex programming tool and OpenAI’s application programming interface.