# MT-Bench

MT-Bench is an AI benchmark; this page records what it measures and traces its data, grader, and scores to primary sources.

Tests conversational quality on challenging multi-turn, open-ended questions scored by model judges.

## Details

- Address: Online, Global
- Website: [github.com/lm-sys/FastChat](<https://github.com/lm-sys/FastChat>)
- Tags: Viral, Science
- Category: Reasoning
- Status: Active
- Data licence: Apache-2.0
- Data access: open
- Grader: llm-judge
- Organization: LMSYS Org
- Released: 2023-06
- Paper: [arxiv.org/abs/2306.05685](<https://arxiv.org/abs/2306.05685>)
- Leaderboard: [lmarena.ai/](<https://lmarena.ai/>)
- Repository: [github.com/lm-sys/FastChat](<https://github.com/lm-sys/FastChat>)
- Task count: 80
- Top-score provenance: unknown
- ABI family: No

## Questions

### Where is MT-Bench?

MT-Bench is at Online, Global.

### How do I contact MT-Bench?

To contact MT-Bench, visit https://github.com/lm-sys/FastChat.

## Source

From [Benchmark primary sources](https://aibenchmarkindex.com/about), license CC0-1.0, checked 2026-10-15.

Last updated October 15, 2026.

## Links

- This benchmark on the [web page](<https://aibenchmarkindex.com/global/online/mt-bench>)
- [Reasoning in Online](<https://aibenchmarkindex.com/global/online/category/reasoning.md>)
- [More benchmarks in Online](<https://aibenchmarkindex.com/global/online.md>)

> **Check before you compare.** Benchmark methods and leaderboards change. Follow the cited primary source before using a result in a decision.