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One agent task fans out into dozens of model calls — and every call is a sovereignty, cost and routing decision. The gateway governs all of them: sovereign by default, cheapest-capable per step, frontier when the step earns it, every hop logged.
A chat app makes one call per message. An agent makes dozens per task — so every weakness multiplies.
Fifty calls to a US-hosted model means fifty chances to leak reasoning under foreign jurisdiction — and fifty frontier-priced calls for steps that didn’t need one. No per-step record.
Each hop is classified and sent to the cheapest sovereign model that fits — frontier only for the step that earns it — under your jurisdiction policy, with a full trace you can replay.
Stav doesn’t pick one model for the whole agent. It decides at every step — so each tool call, retrieval and reasoning pass lands on the right model.
Classification, extraction, tool-routing and retrieval go to fast sovereign models for fractions of a cent each.
Unless a step is explicitly escalated, it stays on EU-hosted models — so the bulk of an agent’s reasoning never leaves Europe.
The one step that needs deep reasoning routes to GPT-5.5 or Claude Opus 4.6 — governed, logged, and the only one you pay top rates for.
When an agent makes 147 calls, “we use EU AI” isn’t provable. Stav logs each step’s model, provider and jurisdiction — replayable and exportable.
Qwen3 · FR · Scaleway
Llama 4 · DE · IONOS
Mistral L3 · FR · Mistral
Claude Opus 4.6 · EU · routed
Sovereign per step, cost-aware per step, logged per step. Point your agent framework at Stav and keep the whole loop in Europe.