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Perplexity — Archive · Vol 343 Issue 3

4 articles that week

Perplexity, Thursday, October 22nd, 2026

Perplexity's guide explains how to evaluate AI agents with trace-based test sets, calibrated graders and regression checks.

Perplexity, Wednesday, October 21st, 2026

Perplexity explains what drives team token spend and offers practical ways to track and reduce AI costs.

Perplexity, Tuesday, October 20th, 2026

Perplexity explains AI gateways, which centralize routing, spend limits, security and monitoring for LLM and agent traffic.

Perplexity, Monday, October 19th, 2026

Perplexity explains harness engineering, the design of everything around an AI model that makes agents reliable.