ArtificialIntelligence.io

The Signal

Everything that matters in AI, with our take.

Updated through the day. Every headline links straight to the source. The two lines underneath are ours.

arXiv cs.AIPaper

Before They Can Solve: Predicting Post-Training Coding-Agent Performance from Base Models

Post-training agents is expensive and most base models won't benefit meaningfully. This work gives you a screening test: replay successful agent runs on candidate checkpoints and see if the decisive step transfers. For anyone doing agentic post-training at scale, this saves wasted compute on models that won't respond. Practical signal on an increasingly important problem.