ResearchBenchmarksLanguage Modeling on PG-19 (64K context length)Follow9.043PerplexityDense9.042969.043239.04359.04377May 20, 2026Evaluation ResultsMethodMethodLinksPerplexityDelta Perplexity95% CI (Perplexity)RatioDenseContext Length=64K, Nu...Context Length=64K, Number of chunks=202026.059.043———CertifiedContext Length=64K, Nu...Context Length=64K, Number of chunks=202026.059.0440.0010.0011.0001