The Best AI Agent for Your Store Isn't the One at the Top of the Leaderboard
We stress-tested 20+ AI agents on 2.4 million real runs, replayed at the exact moments they break inside a live store. See the cream of what we found below.
The accuracy leader is a trap. The #1 agent costs 14× more and runs 8× slower than the model one rank below it, for about three extra points of quality and 1 minute 39 seconds per answer. A single reference run tops €230, against €17 for its near-twin.
Price does not buy safety. In the hardest test, where hostile text tries to trigger a real command, only one agent in the whole table refused. Cheap models sometimes held the line while costly top-ranked ones leaked, so resilience does not track price.
The safest model was unusable. The only agent with zero breaches refused to answer around a dozen times: too cautious costs you as much as too leaky, so you tune safety and usefulness against each other rather than pushing one to the limit.
"Just use Claude" has a catch. Anthropic models are strong on soft, empathetic work but weaker on the strict, repeatable processes that demand precise, structured output.
The setup beats the top performer. Match the model to the task, put deterministic rule-based gates around anything privileged (no model will build these for you at any price) and keep a small benchmark of your own, so testing a dozen new models takes about half a day.
Download the full report for the Pareto-front picks, the benchmark table and how to build the gates hacks.
Price does not buy safety. In the hardest test, where hostile text tries to trigger a real command, only one agent in the whole table refused. Cheap models sometimes held the line while costly top-ranked ones leaked, so resilience does not track price.
The safest model was unusable. The only agent with zero breaches refused to answer around a dozen times: too cautious costs you as much as too leaky, so you tune safety and usefulness against each other rather than pushing one to the limit.
"Just use Claude" has a catch. Anthropic models are strong on soft, empathetic work but weaker on the strict, repeatable processes that demand precise, structured output.
The setup beats the top performer. Match the model to the task, put deterministic rule-based gates around anything privileged (no model will build these for you at any price) and keep a small benchmark of your own, so testing a dozen new models takes about half a day.
Download the full report for the Pareto-front picks, the benchmark table and how to build the gates hacks.
Get the full benchmark
Cost, speed and security scores for every model tested.
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