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lmarena.ai@lmarena_ai

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2026-10-17 03:57

x.com/arena/status/2… Arena.ai @arena Introducing our new agentic version of Max: Arena’s model router that achieves frontier-level performance at 37% lower cost. Built on 2.5M real-world agentic sessions from Agent Arena, Max learns to dynamically select the best model for each task, optimizing for both performance and cost. Max achieves a +14.7% net improvement score in Agent Arena at a median cost of $3.27 per task, matching the performance of Claude Fable 5.1 (Max) at 37% lower cost. Try Max today for a limited time, and dive into more technical details in the thread. 🔗 View Quoted Tweet

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---
tweet_id: "2111184657496899883"
author: "lmarena_ai"
published_at: "2026-10-16T19:57:00+00:00"
source_url: "https://x.com/arena/status/2111184657496899883"
---

[x.com/arena/status/2…](https://x.com/arena/status/2110102742958309380?s=20)

![Arena.ai](https://pbs.twimg.com/profile_images/2017015061454438400/iNKfXZ_I_normal.jpg)

Arena.ai@arena

Introducing our new agentic version of Max: Arena’s model router that achieves frontier-level performance at 37% lower cost.  
  
Built on 2.5M real-world agentic sessions from Agent Arena, Max learns to dynamically select the best model for each task, optimizing for both performance and cost.  
  
Max achieves a +14.7% net improvement score in Agent Arena at a median cost of $3.27 per task, matching the performance of Claude Fable 5.1 (Max) at 37% lower cost.  
  
Try Max today for a limited time, and dive into more technical details in the thread.

![Tweet Image](https://pbs.twimg.com/media/HUiUg8ZaEAENQ3s.jpg)

[🔗 View Quoted Tweet](https://x.com/arena/status/2110102742958309380)