Open Weights vs Proprietary in 2026: Where the Gap Closed and Where It Didn't
Open-weight models now match proprietary frontier on 87% of benchmarks. But the remaining 13%—complex multi-step reasoning, long-horizon tool calling, and adversarial robustness—still separates a $0.00 model from a $15.00 model. This benchmark audit across 22 models reveals exactly where open weights win, where they fail, and the hybrid strategy that gets you the best of both.