OpenAI launches GPT-5.4 with native computer use mode, financial plugins for Microsoft Excel, Google Sheets

The big headlines on this release are efficiency, with OpenAI reporting that GPT-5.4 uses far fewer tokens (47% fewer on some tasks) than its predecessors).

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

The GPT-5.3 and 5.4 models represent a different approach, hinting at a major change in how major AI firms build their tech.
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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 ...