Canary deployments for LLM prompts and models. Repath splits traffic, scores every response with an AI judge, and rolls back automatically before your users notice.
Catch regressions, evaluate quality, and revert automatically — all before your users notice.
Mean responses before a quality drop is flagged and rollback triggered.
Eval runs async — never touches your critical path. Your users never feel it.
How it worksTime from detection to full traffic restore on the stable version.
Route a small % of traffic to a new prompt version. Quality gates control every step — traffic only advances when scores consistently hold.
QUALITY SCORE
0.87
was 0.91
THRESHOLD
0.85
configured
TRAFFIC
50%
to support-v2
STEP
3/4
advancing
Rollout Steps
score ≥ 0.85 for 10 minZero HTTP errors. Zero exceptions. Just worse outputs your users silently abandon — and you don't know for days.
Configurable quality gates at every step. Traffic only advances when scores hold.
Every response evaluated against your rubric. Results arrive in ~120ms, never blocking your users.
Score drops below threshold? 100% traffic back to stable instantly. No on-call needed.
OpenAI down? We retry then silently failover to Anthropic or OpenRouter. Your app keeps running.
How it works
Point your app at Repath instead of OpenAI directly. We route a small % to your new prompt or model — users see nothing different.
An LLM judge evaluates every response against your quality criteria. Async — never adds latency to your app.
Quality holding? Traffic advances to 100%. Quality drops? Rollback in under 500ms, before your users notice.
Everything you need
5% → 25% → 50% → 100% with configurable quality gates at each step.
Define criteria in plain English. Scores every response asynchronously — never slows your app.
Score drops below threshold? Back to baseline instantly. No manual intervention.
OpenAI down? We retry, then silently switch to Anthropic or OpenRouter. Your app keeps running.
Live error rates per provider. Know about outages before your users do.
Every advance and rollback logged with exact scores. Complete visibility into every decision.
Simple pricing
No credit card required to start.
All plans include provider failover, auto-rollback, and real-time dashboard. Cancel anytime.

Know if your prompt change is better or worse — before your users do. Start your free trial in 30 seconds.
Start free trial — no card needed