Perplexity

One billion vectors must live mostly on cheap storage with a 200 ms budget. Decide between SPANN style and DiskANN style designs.

Choose the positional scheme that fails hardest when context quadruples at inference

Anticipate what breaks when you bolt naive early exit onto a decoder at inference

Order the pipeline that stretches an 8k pretrained model to 128k context

Identify what SimPO removes from DPO and the new risk that creates

Fill in the s1 budget forcing trick that stretches or stops thinking

Pick the EU AI Act obligation that most directly drives runtime guardrail design

Pick the best 2026 stack for a self-hosted on prem healthcare deployment

Making retrieval prefer fresh information when similarity alone misleads

Does a model that can describe an image necessarily know how to generate one?