Evaluation Builder

Build evals without a golden dataset upfront

Argmin AI turns your selected traces and expert corrections into a calibrated eval set, no golden dataset required upfront.

First evaluator free · No card · Your data stays private

Start from real traces and keep control of the data.

You want real evals, but you have no labeled golden dataset, and hand-building one is a project on its own.

Generic LLM judges pass the wrong things

A generic judge can tell you an answer sounds reasonable.

It cannot know your task, policies, edge cases, or expert standard until it is calibrated.

Task definition
AnsweredDoes a partial answer pass?
Score anchors
Answered
Edge cases
Covered
Domain model
CoveredBlind to domain synonyms
Release gate
Set
Expert labels
Resolved
Forbidden elements
ResolvedCase 12 vs 41 conflict
Required elements
AnsweredMust it cite its source?

A judge grounded in your business and your experts

Business-specific, not generic

Scored against your product's standard, your domain rules, and your workflow — so you can trust a pass, not take a generic “looks reasonable” on faith.

Built on your experts' vision

Your experts' corrections become the rubric and the labels — it reuses their judgment, it doesn't replace them — so the judge scores the way your team would.

No golden dataset upfront

It cold-starts the judge and a calibrated test set from your traces, plus synthetic and adversarial cases.

Explained, not a black box

Criterion-level scores with a reason for every pass or fail, so you see what broke and why.

A release gate that lasts

Versioned rubric and history; rerun it on every prompt, model, RAG, or agent change.

Your first calibration run is free — then evaluator builds from €25. No card to start.

See full pricing

What you get

Evaluator · calibrated

An evaluation system, calibrated

Rubrics, edge cases, and judges tuned to your domain and aligned with your experts. Ready to run on every model, prompt, or agent change so you see what improved and what broke.

Dataset · aligned

A calibrated test set

A lightweight, labeled set built during calibration. You confirm, override, or drop the labels, so it reflects your team's judgment, not the model's. Enough to start testing the AI agent you are building.

How it works

A calibration flow for teams that do not have a clean golden dataset yet.

Inputs

Bring task, docs, traces, and hypotheses

Start with the AI task, domain docs, selected traces, and a few hypotheses about what good looks like. No golden dataset is required upfront.

TaskDomain docsSelected tracesQuality hypotheses
Bring task, docs, traces, and hypotheses
Argmin AI picks cases and analyzes evaluator mistakes
Cases

Argmin AI picks cases and analyzes evaluator mistakes

The platform finds normal, edge, and high-risk examples and surfaces where the evaluator disagrees with experts, so review time is spent on cases that actually move agreement.

Review

Experts review, confirm or correct calls

Experts review and correct evaluator calls Argmin AI drafts first, never from a blank page.

Experts review, confirm or correct calls
Corrections improve the evaluator and become the eval set
Calibrate

Corrections improve the evaluator and become the eval set

Every correction sharpens the evaluator and updates the calibrated eval set, quality rubric, score anchors, and calibration history.

Run

Test every AI change

Use the evaluator on prompt edits, model switches, RAG updates, routing changes, and agent releases.

Prompt editsModel switchesRAG changesAgent releases
Test every AI change

Real traces first, synthetic cases second

Argmin AI Pareto cost reduction chartArgmin AI Pareto cost reduction chart

0.0%

Safety maintained while optimizing cost

0%

Cost optimization

0

Edge cases

0

Evaluators

Internal Case Study: Mental Health Conversational AI

Main challenge: Use real quality signals before trusting generated cases

Results

  • Selected traces seed the calibration set
  • Synthetic cases expand edge coverage
  • Expert corrections become reusable labels
  • Every label stays tied to the calibration history

The data position

Argmin AI does not pretend synthetic cases are ground truth. Synthetic and adversarial cases expand coverage, while expert-reviewed real traces anchor calibration.

See how labels are created during calibration

Argmin AI selects cases, drafts calls, and turns expert corrections into reusable labels without asking for a golden set first.

Demo · calibration flow7 min to your first evaluator

Key benefits & features

No Upfront Golden Set

No Upfront Golden Set

Start with the data you already have: docs, selected traces, known failures, and hypotheses.

Data Stays Directed

Data Stays Directed

Your team decides which traces and docs are used. Calibration is not a blind scrape of production traffic.

Hard Cases First

Hard Cases First

Argmin AI asks for review on cases that expose disagreement, risk, or policy boundaries.

Reusable Ground Truth

Reusable Ground Truth

Corrections become versioned calibration data instead of one-off review work.

Selected traces / Expert corrections / Versioned calibration data

Your data stays privatePrivate by default

Used only to build and run your evaluator.

We don't train on itNever used to train

Never used to train shared models.

You decide what's sharedYou control sharing

NDA and tighter infra available on request.

1 free run to test1 free test run

No card required. See it work on your data first.

Do not wait for a perfect golden set

Build the first reliable eval set while the evaluator is being calibrated.

First evaluator free · No card · Your data stays private

FAQ

No. Existing labels help, but they are not a precondition. Argmin AI starts from your task, domain docs, selected traces, and expert corrections during calibration.
Usually selected traces, representative outputs, product constraints, and domain docs. You decide what is shared. We can work under NDA and with tighter infrastructure constraints when needed.
No. Synthetic cases can expand coverage, but the calibration anchor should come from your real traces and your experts' corrections.
No. The evaluator drafts calls first, Argmin AI picks the cases that matter, and experts confirm or correct. Labeling becomes review, not a blank-page grind.
A calibrated eval set, quality rubric, runnable evaluator, core regression cases, and calibration history your team can reuse across AI changes.
Yes. The evaluator creates the quality bar first. After that, Argmin AI can optimize prompts, models, routing, retrieval, and agent architecture without flying blind.