Lightcap: Post-training and test-time compute act as force multipliers
Brad Lightcap · OpenAI COO Brad Lightcap: GPT-5's Capabilities, Why It Matters, and Where AI Goes Next · Aug 8, 2025 · at 5:29
OpenAI COO Brad Lightcap discusses how technical approaches to scaling AI have shifted between earlier GPT models and GPT-5.
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“And that continues to hold true, but we now have this kind of other category of training, which is post-training and being able to use test time compute in more interesting ways than we used to as almost kind of a second stage of training. And so we think that that actually gives us a little bit of a boost a force multiplier on our ability to push the model toward new intelligence levels and also be able to train into it a lot of the things that you want an intelligent model to be able to do.”
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