The Execution Intelligence Layer
Xarbiter is a model-agnostic control plane that sits above every AI model and decides, step by step, which model runs which task, under what budget, with what fallback, and with a full audit trail.
Companies no longer choose one AI model. They run many, across vendors.
Their agents make thousands of model calls a day with no one governing them. Xarbiter turns that sprawl into a managed, accountable system.
Multi-model AI is ungoverned where money is spent and risk is taken: the individual model call.
Cost leaks
Agents send simple steps to expensive models and burn tokens with no session-level ceiling.
Unpredictable latency
One slow provider stalls an entire agent workflow, and nothing hedges against it.
No accountability
No one can show which model made each decision, why it was chosen, or what it cost.
Lock-in
Hard-wiring one vendor means re-engineering every time the model landscape shifts.
One layer above every model.
Per-step routing
Each step of an agent workflow goes to the model best suited to it.
Near-zero routing overhead
Pre-computed, lock-free routing tables keep the router from becoming the bottleneck.
Tail-hedged dispatch
When a model runs slow, Xarbiter hedges to an alternate and takes the first good answer.
Cross-model calibration
Models are compared on relative ratios, not raw milliseconds, so routing stays accurate as providers and hardware change.
Session token budgets
Every agent session runs under a hard spending ceiling.
Full audit trail
Every call logged: which model, why, what it cost, what it returned.
Vendor neutrality
Swap, add or drop any model without rewriting the workflows above it.
The Agent Execution Contract
Routing alone is becoming a commodity. Xarbiter's edge is the Agent Execution Contract: a governed, auditable agreement defining how an agent may spend, which models it may use, and what record it must leave behind.
Every session runs under a contract with a token budget, approved models, fallback rules and a complete audit log.
Tools such as TensorZero address model gateways and optimization. Xarbiter goes further, governing the agent itself, not just the call.
Become the standard execution layer every enterprise runs its AI agents through, the way identity and payments became standard layers.
As agents take on real work in healthcare, finance and beyond, every one of them will need a budget, a rulebook and a record. Xarbiter is built to be that layer.
Request early access
Or write to partners@xarbiter.com.