# FrontierCS 2: A Benchmark for Computer Science R&D > Source: > Published: 2026-10-22 19:30:08+00:00 Can LLM agents make contributions to frontier computer science R&D? We introduce FrontierCS 2, a benchmark of 48 open-ended tasks. We take a paper and the code its authors released and delete the paper's contribution. The deleted code becomes the human reference that sets the bar. Earlier open-ended