Deployment confidence for AI inference

Your AI agent works.Until it doesn't.

Cetero qualifies the route. Find the regression before it reaches production.

Run a free route assessment
Offline replayLive verificationSigned recommendation

The problem

  • One change.
  • A new model. A different provider.
  • Suddenly, tool calls break.
  • Schemas drift. Costs spike.
  • No error. Just silent failure.

How it works

The five-step qualification loop.

One change at a time, held against a known-good route. Each step is a checkpoint, not a dashboard — the loop ends in a decision another engineer can re-run.

01 / GOAL

State the route and the contract.

Which workflows must survive the change, and what evidence counts as proof. The contract is declared before anything is measured.

  • Named workflow
  • Success criteria
  • Evidence threshold
02 / CANDIDATES

Enumerate the candidate route.

A new model revision, provider, serving engine, quantization, or configuration change — pinned to exact versions and digests.

  • Pinned versions
  • Route topology
  • Fallback path
03 / QUALIFY

Replay against the baseline.

The same workload runs offline against known-good and candidate routes. Deterministic divergence is separated from expected statistical variation.

  • Held inputs
  • Byte-level diff
  • Scoped signals
04 / DECISION

Scope the verdict to the evidence.

Nothing beyond what was tested. Pinned versions, held inputs, and the smallest stable counterexample travel with the result.

  • PASS / WARN / BLOCK
  • Counterexample
  • Known limits
05 / RELEASE

Ship with a signed recommendation.

A primary and backup route, both validated, with an inspectable bundle a reviewer can re-run without trusting the author.

  • Primary route
  • Backup route
  • Evidence bundle

TECHNICAL FOUNDATION

The evidence kernel works. Route qualification is now in design-partner validation.

Live capture, deterministic replay, scoped verdicts, and rerunnable evidence—now expanding to primary/backup qualification under forced failover.

Design-partner diagnostic

One change. Proven before release.

A fixed-scope engagement that qualifies a single planned change against your own baseline. You leave with a signed primary and backup recommendation, and the evidence bundle behind it.

  • One workflow, end to end
  • One known-good baseline
  • Up to two candidate routes
  • Forced fallback exercised
  • Signed primary / backup recommendation
Design-Partner Diagnostic
$2,500fixed fee, one change
Scope a diagnostic

Limited to teams operating self-hosted or open-weight inference. Every conclusion is bounded to the tested route.

No gateway. No cloud. No eval platform. Our only product is the verdict.

Cetero sits beside your stack, not in front of it. Your prompts, schemas, and infrastructure never leave compute you control.