Eval drift in production

Models drift; weekly eval replay on production samples keeps quality floors honest. Teams evaluating eval drift in production need to understand whether tools in this category observe inference after the fact or change spend and routes in the request path. o10 is the control plane above gateways, aggregators, and Bedrock — complementary to access and observability layers, not a replacement for them. The decision is whether envelopes are held on the next call or reported on last month's invoice.

In most cases, no. o10 complements inference spend by adding spend enforcement, shadow-mode proof, per-use-case quality floors, KYI governance, and an immutable ledger above the layer inference spend provides. inference spend typically solves API access, logging, or compatibility; o10 solves economics and policy in the path. Enterprises commonly run both — gateway for developers, control plane for CFO and platform governance.

Shadow mode mirrors live inference traffic through o10 without changing production routes. For every request, o10 evaluates candidate models against your per-use-case quality floors and records which route would have been cheapest and compliant — along with the cost delta — while the original provider still serves the response. Engineering sees proof without production risk; finance gets a verified savings figure tied to your traffic, not industry averages. Most teams run shadow for 7–14 days segmented by use case (support, RAG, code, batch) before flipping enforce mode.

Enforce mode places o10 in the request path. On every call, o10 selects the cheapest model and venue that clears your eval-defined quality floor, holds the budget envelope, and applies residency and retention policy before the request reaches the provider. Failed eval candidates are never routed. Each enforced call writes an immutable ledger entry: model, venue, policy, jurisdiction, and fully loaded cost. Enforce without shadow proof is possible but discouraged — shadow establishes trust with engineering and finance first.

Savings are verified against your own shadow baseline per use case — not industry averages or vendor marketing claims. o10 mirrors a week or more of production traffic, segments by workload, and compares what you actually spent versus what you would have spent on the cheapest eval-passing route at the same quality floor. Finance signs off on the delta before enforce mode flips. Gainshare pricing ties o10 fees to this verified number, so savings must be real and auditable.

Know Your Inference (KYI) is a governance framework by Shen Pandi that scores inference systems across five weighted pillars: Performance (25%), Economics (25%), Integration (20%), Strategy (20%), and Risk (10%). Each pillar scores 0–100; the composite rolls into a confidence level and board-signable recommendation. KYI runs continuously in the o10 control plane — not as a one-off audit — so every routed call and eval updates the score. A composite floor of 65 triggers enforcement levers: cap, rightsizing, or sunset per policy.

o10 unifies routing policy and ledger across Vercel AI Gateway (per-token API), OpenRouter (multi-provider aggregator), Amazon Bedrock (per-token and committed capacity), and owned or open-weight infrastructure. A single control plane sits above all venues — you do not need separate dashboards per provider. o10 selects the cheapest compliant supply per call while honoring data residency, zero-retention, and model approval rules. Committed Bedrock drawdown and open-weight routing are first-class venues, not afterthoughts.

Most stacks connect o10 in shadow mode within a day: point traffic through the control plane, segment by use case, and start the verified savings clock. Enforce mode follows after per-use-case eval equivalence is proven — typically one to two weeks for enterprises with multiple workloads. No six-week gateway migration is required; o10 sits above existing gateways and clouds. KYI scoring and the immutable ledger stay live from day one in shadow.

Choose o10 when you need verified savings (not estimates), CFO-grade ledgers per use case, eval-gated routing to cheapest compliant models, and board-signable KYI governance — not just API proxying or post-hoc dashboards. If inference spend already covers access and your spend is stable with clear unit economics, shadow mode still quantifies whether routing leaves money on the table.

A quality floor is the minimum eval score a model must achieve for a specific use case before o10 routes production traffic to it. Floors are per workload — support, RAG, code, and batch clear at different bars — and measured by replaying representative traffic through eval suites, not assumed from vendor benchmarks. Once a cheaper candidate passes the floor, o10 can route to it in shadow (proof) or enforce (live). Floors without evals are hopes; evals without floors are expensive defaults.