Claude Opus 5.5
AI21 says post-training pushed Nemotron 3.5 Super past frontier quality
AI21 says it has post-trained NVIDIA Nemotron 3.5 Super VL to outperform Claude Opus 5.5 on Deel’s global payroll benchmark, while costing 50x less per 1M tokens. The…
Ai2's StateBench Shows Frontier Models Struggle to Track State Over Long Inputs
Ai2 has introduced StateBench, a benchmark that measures how well language models keep track of entities as they change across long documents. According to Ai2…