Perplexity launches Portable Computer local-first agent with PPLX 27B

Perplexity's Portable Computer, a local-first agent with an on-device 27B model, scores 82.6% on real knowledge work, beating open-source harnesses Pi and Hermes; post-trained PPLX 27B reaches 85.4%. On Terminal Bench 2.1, escalation to frontier advisor lifts score from 59.6% to 73.0% at $0.415 per rollout.