binary breakthroughs

Notes on building data platforms, AI systems, and the infrastructure between them

Featured Articles

RLVR Beyond Math and Code: The Verifier Problem Nobody Has Solved

Reinforcement Learning with Verifiable Rewards powers every reasoning model worth talking about. But it only works where you can check the answer automatically. Extending it to messy, real-world domains is the hardest open problem in LLM training right now.

19 min read   ·   January 18, 2026

I Trained Probes to Catch AI Models Sandbagging

First empirical demonstration of activation-level sandbagging detection. Linear probes achieve 90-96% accuracy across Mistral, Gemma, and Qwen models. Key finding - sandbagging representations are model-specific, and steering can reduce sandbagging by 20%.

10 min read   ·   December 20, 2025

All Articles