# Kimi K3.1 Pro lands #11 in Agent Arena with 7.6% net gain

> Original title: Kimi K3.1 Pro (Max) by @Kimi_Moonshot just landed in the Agent Arena at #11 with +7.6% net improvement across +4K real-world agentic sess...

- Source: Arena
- Published: 2026-10-24T14:57:12.000Z
- Bad Influence: https://badinfluence.news/items/vvi3g83sj60cu3d3s8b00nfbp
- Original: https://x.com/arena/status/2114008313054527901

## Summary

Kimi K3.1 Pro (Max) ranks #11 in Arena's Agent Arena with a +7.6% net improvement across more than 4,000 real-world agentic sessions, up from #25 for Kimi K3 (Max). Its median cost is $1.03 per task, 13% less than the earlier variant. Arena also ranks it #8 in Code Arena: WebDev with 1692 points, matching Claude Opus-5 (Max) at 70% lower cost, with open weights promised soon.

## Post

Kimi K3.1 Pro (Max) by @Kimi_Moonshot just landed in the Agent Arena at #11 with +7.6% net improvement across +4K real-world agentic sessions from our global community of users.

Kimi K3.1 Pro (Max) would be the new #1 open model in the Agent Arena overtaking DeepSeek-v4.1-Flash! Open weights coming soon, stay tuned.

Kimi K3.1 Pro (Max) is a +6 percentage pt improvement over Kimi K3 (Max) at +1.6% (#25 -> #11). And with a $1.03 median cost per task in Agent Arena, Kimi K3.1 Pro is 13% less than its previous variant. See its placement just off the Pareto frontier in thread.

Across Agent Arena categories, Kimi K3.1 Pro (Max) ranks #8 in Work, #9 in Code, and #10 in Chat.

By signal, it’s the strongest in Praise vs. Complaint (implicit sentiment in user reactions) with +19% at #8. Across other signals it landed:
- #11 in Steerability (+8.3%)
- #15 in Bash Reliability (+8.3%)
- #26 in Confirmed Success (+2%)

Huge congrats to the @Kimi_Moonshot team on this release!

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHVZ222-XcAA9JVD.jpg&mode=thumb&exp=1793836800&sig=361f8ebabd44df02)

## Quoted post @arena

> Big news: @Kimi_Moonshot is back in the top-4 labs in the Code Arena: WebDev with the release of Kimi K3.1 Pro!
> 
> This model just landed #8 in the Code Arena: WebDev with 1692 pts, matching Claude Opus-5 (Max) at 70% lower cost. This is a 9 place jump (+37 points) from Kimi K3 (Max) at #17 with 1655 pts.
> 
> Kimi K3.1 Pro improved from Kimi K3 across all categories. Highlights:
> - #7 in Brand & Marketing (up from #9)
> - #9 in Simulations (up from #20)
> 
> Cost efficiency is another upgrade. Priced at $2/$10 per million input/output tokens, Kimi K3.1 Pro (Max) has a median cost per task of $1.23 (29% less than Kimi K3). See its placement compared to the Pareto frontier in thread.
> 
> With open weights coming soon, Kimi K3.1 Pro would be the new #1 open model in the Code Arena: WebDev, overtaking DeepSeek-v4.1-Flash. Stay tuned!
> 
> See @Kimi_Moonshot’s ranking by lab, and 3D generations from Kimi K3.1 Pro below in thread.
> 
> Huge congrats to the @Kimi_Moonshot team on this release!

https://x.com/arena/status/2113687344532320326