AgentArena is a Claude prompt system that runs structured, head-to-head evaluations of your prompts and agents — scoring them on your real criteria so you ship the version that performs, not the one that felt right.
✓ 14-day money-back guarantee · One-time payment · Yours forever
Two prompts, three models, a dozen tweaks — and no real way to tell which is better than eyeballing a few outputs. AgentArena turns that guesswork into a repeatable evaluation: define your test cases and scoring rubric once, then run any prompt or agent through the same gauntlet and get a clear, defensible winner.
Builds a structured set of representative inputs and edge cases so every contender is judged on the same battlefield.
Define what 'good' means — accuracy, tone, format, safety — and AgentArena scores each output against it consistently.
Runs contenders against the suite and reports a clear winner with per-criterion breakdowns and failure examples.
Pinpoints exactly where the weaker prompt failed so your next iteration is targeted, not random.
Tell AgentArena what the prompt is supposed to do and what 'good' looks like. It builds the rubric and test suite for you.
Paste two or more prompts, agents, or model setups. AgentArena runs each through the identical evaluation.
Get a scored, side-by-side verdict with breakdowns and fix notes — so you ship with evidence, not opinion.
The master prompt that builds test suites, rubrics, and head-to-head evaluations on demand.
Ready rubrics for accuracy, tone, format compliance, and safety — plus a builder for custom criteria.
Re-run the same suite after any change to catch quality regressions before your users do.
Every future version ships to you automatically. Pay once, get everything.
No. AgentArena runs on Claude's free tier; Pro is faster but optional.
A structured Claude prompt system delivered as a file. Run it inside Claude.ai — no installs.
Yes. Paste outputs from any model or agent; AgentArena scores them against your rubric the same way.
14 days, no questions asked.
One-time $97. No subscription. 14-day money-back guarantee.
Get AgentArena — $97