How much does it cost to run a classifier on every trace?

Classifiers are included in Tessary’s published price: $0.001 per trace, with a $100 monthly minimum. At 1 million traces a month that is $1,000, and every one of those traces goes through the full classifier layer. There is no separate meter for classification.

The rate can stay flat because the always-on checks have negligible per-trace cost. The expensive LLM judgment only reads the findings classifiers write, which is a small slice of traffic, so the heavy cost tracks how often the cheap checks fire rather than how much you serve.

One trace is one agent turn: the user’s message, your agent’s full response, and every tool call in between.

keep reading

More on this.

Can I add a custom classifier for my own agent?Yes. Custom classifiers run alongside the built-ins on the same finding-and-threshold mechanism, fine-tuned to your own agent's failure modes instead of a generic one.answer →What happens when a Tessary classifier flags a trace?The score crossing its threshold writes a finding, not an alert. Triage decides whether it's a real deviation, and only then does it become a case.answer →What is a Tessary classifier?A narrow, cheap check that scores one production trace for a single property, cheap enough to run on all of it instead of a sample.answer →Everything on tessary classifiersThe definition, and every question answered under tessary classifiers.concept →

Send us the traces you already emit.

book a demo