Assess LLM cost tracking, provider keys, workload budgets and retention, with tests that distinguish notifications from enforceable spending limits.
Cost control starts with knowing who incurred a charge and what happens when a budget is reached. Use this guide to evaluate Sluis across managed gateway and Workspace requirements without assuming that a dashboard, provider key or notification automatically enforces a spending ceiling.
Establish the cost ledger and key ownership
Sluis offers a managed EU-first gateway and Workspace, with usage-based pricing and multiple model providers. Build a cost ledger that distinguishes Sluis charges, any separately billed provider usage and your own operating costs without counting the same usage twice. Ask which usage and cost fields can be demonstrated, how current they are and how estimates reconcile with invoices.
Illustrative scenario: support drafting and nightly indexing share a provider account but need separate cost owners. Require attribution by workload and investigate retries, failed requests and model changes. If bring your own key, or BYOK, is required, obtain provider-specific confirmation of support, key custody, rotation and billing responsibility. Do not treat this procurement requirement as blanket shipped support.
- Assign a cost owner and reporting period to each workload.
- Reconcile a sample of attributed usage with provider and Sluis billing records.
- Confirm BYOK support and key responsibilities for each intended provider.
Separate budgets, notifications and spending stops
Sluis provides budgets per workload, rate limits and model and MCP tool policy controls. These address different risks: rate limits constrain request throughput, while model policy restricts selection. A budget setting alone does not prove notification delivery or a hard pre-request spending block. Ask what is enforced, where it is enforced and how quickly usage updates affect decisions.
Illustrative acceptance test: assign a deliberately small test budget to nightly indexing and send synthetic requests across its threshold. Record whether an alert arrives, whether the next request is denied and what happens to in-flight work. Test delayed provider accounting separately. These are proposed acceptance criteria, not a claim that every notification channel or hard-stop behavior is available.
- Define thresholds, recipients, delivery timing and the owner of each response.
- Test alerts and request blocking as separate outcomes.
- Document concurrent requests, accounting delays, resets and authorized exceptions.
Evaluate caching without obscuring retention
If an application, provider or proposed gateway cache is part of your design, confirm where it exists and whether your selected route supports it. Do not assume Sluis supplies response caching. Illustrative test: repeat a synthetic request, then change the tenant, model or policy and inspect reuse. Require appropriate isolation, freshness and invalidation before estimating any benefit from cache hits.
Caching and retention are separate decisions. Sluis keeps content by default until erased or configured otherwise, and metadata is retained. A cache expiry does not establish deletion from gateway records, provider systems or backups. Default reversible tokenization is not irreversible anonymization. Compare cache keys, stored responses and retention settings using synthetic sensitive data, and ask who can access or reconstruct the content.
- Identify the cache owner, location, billing treatment and supported routes.
- Test cross-tenant isolation, stale responses and invalidation after policy changes.
- Review content retention and metadata separately from cache expiry.
Buy against reconciled evidence and operating costs
Run a bounded pilot with synthetic support drafts and indexing requests, including a model change, a failed request and a deliberate retry. Compare workload attribution, final billing and observed enforcement rather than relying on projected savings. If you choose Edge, include infrastructure and staff: it runs the full product on your Kubernetes or Docker, with air-gapped local-model deployments possible, while you manage backups and the licence.
Use the current pricing page for usage-based commercial terms rather than a fixed cost assumption. Agree reporting definitions, reconciliation frequency, budget-change approvals and an incident procedure for unexpected spend. Treat finance-system exports or connectors as requirements to validate, not assumed integrations. Review published ISO 27001 material as procurement evidence, without treating it as a guarantee of legal compliance.
- Approve the pilot only after billing and policy outcomes are explained.
- Include provider, platform, infrastructure and operating costs without duplication.
- Record reporting gaps, integration dependencies and budget-change responsibilities.
Questions before you decide
Does BYOK automatically reduce the total cost?
No. First confirm support for your provider. Compare the applicable Sluis charges, provider billing and the work of managing keys. A different billing route does not itself establish lower total cost, and no measured savings are assumed here.
Is a budget notification the same as a spending block?
No. A notification informs someone; a block prevents an action under defined conditions. Validate both separately, including delivery failures, accounting delays and in-flight requests. Do not promise a strict ceiling without evidence of the enforcement behavior.
Can tokenization or caching provide universal zero retention?
No. Tokenization changes content representation and caching stores reusable data; neither establishes zero retention. Detection is imperfect, and existing web search results and model output are not newly tokenized. Review content and metadata handling separately across Sluis, providers and your applications.