The University of Texas at Austin (UT Austin) tuition varies greatly depending on several factors: your residency status (in-state vs. out-of-state), your academic program, the number of credit hours you take, and any applicable fees. There isn't a single "tuition per semester" figure.
To find the most accurate estimate for your situation, you should visit the UT Austin's official website and use their tuition calculator. This tool will allow you to input your specific information to receive a personalized estimate.