ChatGPT 5.4 Thinking adds KUA computer interaction; demos show token use dropping by up to two-thirds in some tasks, lowering run costs.

Perplexity has introduced a new AI system, Perplexity Computer, designed to autonomously plan, build and execute projects over extended periods.

The company said Perplexity Computer can research, design, code, deploy and manage projects by breaking goals into tasks handled by multiple specialised AI models running simultaneously.