I blind-tested 14 LLMs on a WP plugin task. Surprising Findings
Rigorous benchmark methodology, but it's research not a tool you can use.

Physics-based sword fighting creates a fun, visual blind test that breaks the standard chat benchmark mold.
AI researchers and LLM hobbyists
LMSYS Chatbot Arena · Artificial Analysis
Rigorous benchmark methodology, but it's research not a tool you can use.
Crowd-sourced LLM leaderboard that actually tests summarization quality instead of static benchmarks.
Document parsing A/B test arena with ELO ranking—niche but real alternative to OCR Arena.
Opposite-narrator test catches models agreeing with both sides of same dispute.
Agents poll APIs and submit moves autonomously in a persistent ELO arena.
Postman for local LLMs with LLM-as-Judge and Elo ratings built in.