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Prove your AI works the way you expect

Calibrated evals for product teams that solve reliability issues before they reach your customers.

Evals your whole team can see and trust

Calibrated graders

Turn real samples into rubric-backed graders, align them with your expectations, and keep drift in check.

Plain text evals

Describe success criteria in natural language so cross-functional teams can ship evals without bespoke tooling.

Collaborative workflows

Share grading context with PMs, eng, sales, and QA so everyone iterates together and ships fast.

Calibration dashboard

Monitor incoming samples and launch calibrations from the dashboard.

Latest samples
    Sample_129389085-92385
    4
    Sample_129389085-92381
    0
    Sample_129389085-92380
    0
Graders
    Accuracy grader
    +398%
    1 sample flagged for calibration
    Brevity grader
    +387%

Make something you know works for your customers

  • Rate reference samples

    Label real conversations so the system understands quality.

  • Create graders

    Generate rubric-backed graders based on those ratings.

  • Calibrate graders

    Tighten grader outcomes until they match human reviewers.

  • Spot-check discrepancies

    Drill into failing samples before they hit production.

  • Escalate to guardrails

    Promote recurring failures into guardrails with a click.

What people are saying

This completely changes how we think about LLM development.

Joseph Ferro
Head of Product, Velvet

I was shopping around for an evals product, but nothing out there struck, and no one is moving as fast as you guys.

Daohao Li
Founder, Munch Insights

Very, very cool

Austen Allred,@Austen
Founder, Gauntlet AI

Super elegant open source eval tool!

Amjad Masad,@amasad
CEO, Replit

Join the waitlist

Get early access to enhanced AI tooling and structured prompt workflows, and be the first to know when new features ship.

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