ChatArena is a Python-driven framework fashioned to aid in the crafting and evaluation of multi-agent systems underpinned by large language models (LLMs). It offers a versatile setting where agents can engage through gaming or dialogue-driven scenarios. Allowing developers to tailor-make their own environments, games, and interactions, this framework is a fit for AI research pertaining to autonomous systems, social exchanges, and the benchmarking of language models. To facilitate user experience, ChatArena comes equipped with both a web-based user interface and command-line interface.