The LMArena platform has emerged as a new tool in web development, allowing users to input requirements and receive code from two competing models, with the front-end page rendered for user evaluation. Currently, Claude 3.5 Sonnet ranks first in this evaluation, followed by R1. Additionally, the WebDev Arena is a free platform where large language models (LLMs) compete to build web applications. A recent blog post by the LMArena team details the evaluation process for LLM-generated web apps, utilizing an isolated sandbox environment developed by E2B. Furthermore, the SWE Arena has been introduced as a coding platform that supports real-time code execution and rendering, incorporating various frontier LLMs and vision-language models (VLMs). This initiative was initially conceived two years ago within the Big Code Project team.