A retirement or deprecation date
A provider has announced the end of the model your agent runs on.
Upgrade Sprint / two to three weeks / fixed price
Change models on evidence.
A new model or a retirement date is coming. In two to three weeks we run your own tasks across the candidates, put a regression gate in place, and hand you a decision: adopt, hold or switch, with the rollout and rollback plan.
Sample decision memo · synthetic example
Model change decision
- Change
- A candidate model for the support-triage workflow, with the same prompts and tools.
- Result
- Quality held on 48 of 50 cases and the median wait fell. Responses grew longer, and two cases doubled their tool calls.
- Decision
- Adopt for triage behind the gate. Hold refunds until the two failing cases pass.
- Delete
- The retry wrapper around the classifier. The candidate no longer needs it.
When to bring us in
When the model under your agent is about to change.
A faster or cheaper candidate
A new model looks better on paper, and you need to know for your workflow.
An upgrade already changed behavior
Answers, latency or cost moved after a model or settings change, and you need to know why.
The handover
Five outputs. One decision.
The decision rests on your own tasks, scored the same way before and after the change.
Candidate comparison
Your tasks run across the candidate models and settings, scored on quality, speed, cost and control.
Regression gate
The cases that block a change, wired into your pipeline.
Decision memo
Adopt, hold or switch, with the evidence behind it.
Rollout and rollback plan
A staged release with a tested way back.
Scaffolding you can delete
Prompts, retries and workarounds the new model no longer needs.
The process
Baseline. Compare. Gate. Roll out.
Measure what you have.
Score the current model on your own cases, counting every attempt.
Run the candidates.
The same cases across candidate models and settings, including verbosity, tool calls and the wait between them.
Write the decision down.
Set the regression gate and record adopt, hold or switch, with the evidence.
Release with a way back.
Stage the change, watch the scorecard and keep the rollback ready.
Before we start
What if the new model is worse for us?
Then the decision is hold, with the evidence, and the gate catches the same regression next time.
Do you favor a model provider?
No. We don't resell models or platforms, and the comparison runs on your cases.
What about deprecation dates?
We plan the comparison, regression gate and rollout around your model's retirement date.
Can our team run the next change?
Yes. The gate and the cases stay in your pipeline, and the decision memo shows how to read them.
Does every release need a sprint?
No. Harness Watch gives every relevant release a verdict. The sprint is for the changes that need real work.
Start a conversation
What are you building—or deciding?
Tell us what you’re building, what is getting in the way, and the outcome you need.