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Chat lmsys

Test and compare open-source language models for AI.

FreeStarting price
386KMonthly visits
43Popularity
Chat lmsys featured image

About Chat lmsys

Chat lmsys allows you to chat with different open source AI models and compare their quality and performance. It supports Vicuna, LLaMa, Alpaca, WizardLM, Dolly, GPT4All-Snoozy and other popular open source language models. This tool is suitable for data scientists, machine learning enthusiasts, and developers who want to compare AI language models, perform tasks such as summarization, classification, and question and answer, and improve data acquisition. Chat lmsys is available for free and is open source. It is not yet as advanced as GPT-3.5 but has the potential to perform many tasks of GPT-3. Improved data leads to better model performance and open-source models may soon be able to perform many tasks of GPT-3. The tool is useful for comparing AI language models, which can lead to better model performance and more accurate results. It is also useful for data scientists and machine learning enthusiasts who want to experiment with different AI models and compare their performance. Chat lmsys is a useful tool for anyone who wants to test and compare open-source language models for AI.

Arena

United States · Founded 2023

Founded
2023
Headquarters
United States

Key features

  • Compare AI language models
  • Supports multiple open source AI models
  • Improved data acquisition
  • Substantial use case coverage
  • Suitable for data scientists, machine learning enthusiasts, and developers
  • Available for free and open source
  • Perform tasks such as summarization, classification, and question and answer

Use cases

  • Compare AI language models for better model performance
  • Perform tasks such as summarization, classification, and question and answer
  • Improve data acquisition for more accurate results

Pros

  • Enables direct comparison of multiple open-source AI language models in a single interface
  • Provides a public leaderboard and ranking system for evaluating model performance
  • Supports interactive chat and task-based evaluations like summarization and question answering
  • Accessible to developers, researchers, and enthusiasts without requiring local setup
  • Facilitates experimentation with emerging open-source models

Cons

  • Responses may be inaccurate as inputs are processed by third-party AI providers
  • Submitted conversations and personal information may be disclosed publicly to support AI research
  • Not as advanced as proprietary models like GPT-3.5 in terms of performance or capabilities
  • Requires users to avoid submitting sensitive or personal information due to public disclosure risks

Frequently asked questions about Chat lmsys

What is Chat LMSYS?

Chat LMSYS is a platform that enables users to interact with and compare multiple open-source AI language models side by side. It provides a space to evaluate model performance, quality, and capabilities through direct chat interactions.

Who should use Chat LMSYS?

The tool is designed for data scientists, machine learning researchers, developers, and AI enthusiasts who want to experiment with, compare, and evaluate different open-source language models for tasks like summarization, classification, and question answering.

How does Chat LMSYS work?

Users can engage in chat conversations with various open-source models such as Vicuna, LLaMa, and Alpaca. The platform facilitates direct comparison by allowing side-by-side interactions and performance evaluation within a unified interface.

Is Chat LMSYS free to use?

Yes, Chat LMSYS is available for free and is open-source, allowing users to access and compare models without cost. However, users should be aware that conversations may be shared publicly to support AI research.

What are the limitations of using Chat LMSYS?

The platform relies on third-party AI providers for processing inputs, which may result in inaccurate responses. Additionally, users are advised not to submit sensitive or personal information due to potential public disclosure.

How can I get started with Chat LMSYS?

To begin, visit the LMSYS website and navigate to the Chat interface. Users can start chatting with supported models immediately, though they should review the platform's data handling and privacy policies before use.

Chat lmsys traffic & engagement

lmarena.ai · third-party estimates from Similarweb

Data as of Sep 2026Full AI website ranking →
Monthly visits · Sep 2026386K+15.4% MoM12-month high 429K (Jun 2026)
Rank among AI websites#903▲ 85 vs last monthof 8,652 tools on aitoolnavio™
Rank in Chatbots & Assistants#89of 987 tools in this category
Top marketChina39.3%Top 5 countries bring 56% of visits
Average visit1m 19sLonger than 67% of AI sites
Pages per visit1.39Average pages viewed
Bounce rate60%Leave after one page · lower is better
Similarweb global rank#164,725#3,633 in Morocco

Traffic trend

Last 4 months · grows by one month every month

  • Jun 2026429K
  • Jul 2026415K−3.4%
  • Aug 2026334K−19.4%
  • Sep 2026386K+15.4%

Top countries

Share of visits · estimated visits

  • China152K39.3%
  • United States24K6.1%
  • Russia19K4.8%
  • India13K3.3%
  • Belarus9.6K2.5%

Other countries: 44%

Visits sent by AI assistants

How people reach this site from other AI tools

41 a month

  • ChatGPT6.6%

Traffic figures are third-party estimates, good for scale and trends; they can differ from a company's own numbers. Updated monthly.

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