GLM-5.3 DELIVERS OPUS 4.8-LEVEL PERFORMANCE AT A FRACTION OF THE COST

Summary from the TLDR InfoSec newsletter

Semgrep benchmarked the new Grok models and GLM-5.3 on their standard IDOR vulnerability-finding benchmark. They found that Grok 4.6 Exacto roughly matched Opus 4.7's F1 score at less than a third of the cost. GLM-5.3 was able to compete with Opus 4.8 at one seventh of the cost.