Nice scoop by Anton Caputo and Tracy Idell Hamilton:

CPS Energy knew a year ago that contractor Toshiba Inc. wanted at least $4 billion more than San Antonio was willing to pay for the nuclear expansion, according to several sources close to the deal.

Despite this, utility officials used a much lower figure as they pitched the project at public meetings during the summer, arguing that nuclear was the most cost-effective way for San Antonio to meet its future energy needs.