---
type: "post"
id: "kimi-k3-1-pro-debuts-at-8-on-bd08e0"
slug: "kimi-k3-1-pro-debuts-at-8-on-bd08e0"
title: "Kimi K3.1 Pro debuts at #8 on Arena's Code Arena WebDev leaderboard, putting Moonshot 4th among labs"
description: "Arena’s Code Arena WebDev leaderboard lists Moonshot’s Kimi K3.1 Pro (Max) at model rank 8, giving Moonshot rank 4 among 24 labs."
retrieval_nugget: "Arena’s Code Arena WebDev leaderboard lists Moonshot’s Kimi K3.1 Pro (Max) at model rank 8, giving Moonshot rank 4 among 24 labs."
published_at: "2026-10-24"
updated_at: "2026-10-24"
record_date: "2026-10-24"
date_kind: "published_at"
topics: ["anthropic","claude"]
entities: ["Arena","Code Arena WebDev","Moonshot","Kimi K3.1 Pro","Anthropic","Claude Opus 5.5","OpenAI","GPT-6 Astra"]
related_patterns: ["ai-engineering-evaluations-are-splitting-into-task-specific"]
novelty_label: "same_event"
what_changed: "Same event as KIMI AI 🔥 : Kimi K3.1 Pro landed on the 8th spot on WebDev Arena, with Kimi AI moving to the 4th place among AI labs overall."
prior_refs: ["memory:c5695bd7-3d4e-89eb-ad68-724a9cfbdb2b"]
source_url: "https://arena.ai/leaderboard/code/webdev?rankBy=labs"
source_urls: ["https://arena.ai/leaderboard/code/webdev?rankBy=labs"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "post:kimi-k3-1-pro-debuts-at-8-on-bd08e0"
status: "published"
visuals: []
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
routes: {"html":"https://newruntime.com/posts/kimi-k3-1-pro-debuts-at-8-on-bd08e0/","markdown":"https://newruntime.com/posts/kimi-k3-1-pro-debuts-at-8-on-bd08e0.md","json":"https://newruntime.com/posts/kimi-k3-1-pro-debuts-at-8-on-bd08e0.json"}
---

# Kimi K3.1 Pro debuts at #8 on Arena's Code Arena WebDev leaderboard, putting Moonshot 4th among labs

## Retrieval answer

Arena’s Code Arena WebDev leaderboard lists Moonshot’s Kimi K3.1 Pro (Max) at model rank 8, giving Moonshot rank 4 among 24 labs.

Arena’s Code Arena WebDev leaderboard lists Moonshot’s Kimi K3.1 Pro (Max) at model rank 8, giving Moonshot rank 4 among 24 labs. The page is dated October 22, 2026 and reports 923,854 votes.

Kimi K3.1 Pro has a preliminary score of 1692, with an uncertainty range of +14/-14 and a displayed rank spread of 7 to 13. Anthropic’s Claude Opus 5.5 (Max) leads at 1807, followed by OpenAI’s GPT-6 Astra (Max) at 1774 and Meta’s Muse Wonder Full (Max) at 1726. Google’s Gemini 4 Argon (High) is fifth at 1674.

Arena describes the ranking as covering front-end web-development tasks, including agentic coding workflows that require multi-step reasoning and tool use. The listing identifies Kimi K3.1 Pro as proprietary and marks its result preliminary.

The leaderboard does not establish Kimi K3.1 Pro’s price, availability, release terms, or performance on coding work outside Arena’s evaluation setup. It also does not establish a causal comparison with the models ranked above or below it.

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

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