GPT‑5.6 Sol is increasingly helping us find and deliver the next round of gains. Within a human-led process, Sol autonomously rewrote and optimized production kernels, designed and ran hundreds of experiments to improve token generation, and monitored training, intervening when problems arose. The kernel work helped reduce the end-to-end cost of serving the model by 20%, while its experiments increased token-generation efficiency by more than 15%. This work continues, creating a tighter feedback loop: as our models improve and are able to work more autonomously, our ability to improve efficiencies accelerates.
Read more about the engineering behind GPT‑5.6.