Perplexity just made a quiet but consequential swap inside its Computer platform: Grok 4.5, xAI's brand-new flagship model, is now available as the orchestrator model for Pro and Max subscribers. The announcement came alongside an internal benchmark result that will raise eyebrows across the industry -- Grok 4.5 outscored every other orchestrator configuration Perplexity tested, at roughly half the cost of Claude Opus 4.8.
What is Perplexity Computer, and why does the orchestrator matter?
Perplexity Computer is a multi-agent orchestration platform -- a cloud-based AI system that coordinates 19 frontier AI models simultaneously to complete complex, end-to-end tasks. Instead of asking one AI model to do everything, Computer breaks your request into subtasks and assigns each piece to the model best at it. Think of it as a general contractor that hires the best specialist for each part of the job.
The orchestrator is the brain of the whole operation. Computer's orchestration engine analyzes your task, breaks it into subtasks, and assigns each subtask to the optimal model. Previously, Perplexity Computer ran Opus 4.6 for its core reasoning engine and orchestrated sub-agents with the best models for specific tasks: Gemini for deep research, Nano Banana for images, Veo 3.1 for video, Grok for speed in lightweight tasks, and ChatGPT 5.2 for long-context recall and wide search. Now, Grok 4.5 steps into the conductor role.
Who is Grok 4.5?
Grok 4.5 is SpaceXAI's smartest model built to excel at coding, agentic tasks, and knowledge work. It is their strongest model ever and was trained alongside Cursor. Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math.
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