How OpenAI used a new data type to cut inference costs by 75%

Posted by bob on Aug 10, 2025 12:51 PM CST
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Decision to use MXFP4 makes models smaller, faster, and more importantly, cheaper for everyone involved Analysis Whether or not OpenAI's new open weights models are any good is still up for debate, but their use of a relatively new data type called MXFP4 is arguably more important, especially if it catches on among OpenAI's rivals.…

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