Perplexity has quietly wired Grok 4.5 into the heart of its answer engine, and the move is paying off on the leaderboard. The company’s multi-model orchestrator now routes the hardest reasoning subtasks to Grok 4.5, and the combined system has edged past Opus on the WANDR benchmark — a test built around long, multi-step agentic reasoning rather than tidy trivia.
The interesting part isn’t the headline number. It’s what the result says about architecture. WANDR rewards systems that can plan, branch, and recover across dozens of steps, and a router that hands the right slice of work to the right model clearly out-executes any single flagship trying to do everything alone. When an orchestrated ensemble beats a standalone frontier model, the “one model to rule them all” thesis takes another hit.
For builders, the lesson is practical: stop optimizing for the single best model and start optimizing for the router. Mix capable, cheaper models behind smart routing and you often match — or beat — the premium tier while trimming cost. Perplexity just turned that theory into a benchmark win, and the rest of the agent ecosystem is watching.
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