Varun Pratap Bhardwaj
testing· Part of Qualixar

AgentAssay

Regression Testing for Non-Deterministic AI Agents

AgentAssay is a statistically rigorous testing framework for AI agents. It replaces the industry’s guess-and-pray approach with hypothesis-driven regression testing that tells you exactly how many trials you need, how confident the result is, and how much it will cost.

The Problem

The Problem

Testing non-deterministic AI agents is brutally expensive. A single comprehensive test run across model versions, prompt variants, and tool configurations can cost $150–200 in API tokens alone. Teams either over-test and blow their budgets, under-test and ship broken agents, or skip testing entirely and hope for the best. None of these are engineering.

$150–200
average cost per AI agent test run
How It Works

Key Capabilities

01

Token-Efficient Testing

Achieves 5–20x cost reduction compared to brute-force repetition. Uses adaptive sampling to concentrate compute on the scenarios that actually matter.

02

Three-Valued Verdicts

Every test returns PASS, FAIL, or INCONCLUSIVE with a calibrated confidence interval. No more binary pass/fail on inherently stochastic systems.

03

Behavioral Fingerprinting

Builds a statistical signature of each agent’s behavior profile. Detects regressions by comparing fingerprints across versions, reducing required trials by 30–50%.

04

Adaptive Budget Optimization

Computes the exact minimum number of trials needed per scenario to reach your target confidence level. No wasted tokens, no under-powered conclusions.

05

pytest Plugin and Framework Adapters

Ships as a pytest plugin with six adapters for popular agent frameworks. Drop it into an existing test suite and start testing agents alongside your unit tests.

Evidence
15,500+
Lines of Code
432
Tests Passing
51
Page Paper
5
Formal Theorems
6
Framework Adapters
~83%
Cost Reduction
From the Qualixar Suite