LiveBench
A Challenging, Contamination-Free LLM Benchmark
- Status
- Generally available
- Last checked
- Checked · Oct 12, 2026
- License
- Open source
- Pricing
- Free tier
What it is
LiveBench is a benchmark tool designed to provide challenging and contamination-free tests for language models. It helps developers and researchers evaluate the performance of their models under rigorous conditions.
LiveBench stands out as the only tool offering contamination-free benchmarks, ensuring that performance metrics are not skewed by external factors.
When it fits — and when it doesn’t
A good fit for
Teams needing rigorous and contamination-free benchmarking for their LLMs
Researchers comparing the performance of various language models in a controlled environment
Look elsewhere if
Developers looking for real-time model testing (LiveBench focuses on batch processing)
Projects requiring extensive customization of benchmark tests beyond provided options
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited language support beyond Python
Primary language is Python and official support for other languages is lacking
- 02
Expensive at scale due to proprietary licensing
Commercial pricing model becomes costly as the number of tests increases
What it does well
Challenging benchmarks for LLMs
Contamination-free testing environment
Detailed performance metrics
Pricing
- Free tier
- Yes
- Paid from
- —
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up LiveBench
Setup steps, common gotchas and what to check after 30 days.