Model Routing and Fallback Layer for Client Delivery (10-15 days)
Builds a provider-agnostic routing and fallback layer across two or more foundation model platforms so client automations survive price changes, rate limits and model deprecations. The agency ships a tested routing policy, cost ledger and retention map instead of a single-vendor dependency. Time: 10-15 days.
By InnovaAI ResearchPublished
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Model Routing and Fallback Layer for Client Delivery (10-15 days)
Builds a provider-agnostic routing and fallback layer across two or more foundation model platforms so client automations survive price changes, rate limits and model deprecations. The agency ships a tested routing policy, cost ledger and retention map instead of a single-vendor dependency.
- Written inventory of every client workflow that calls a model API, with monthly token volume per workflow
- Read access to current provider consoles and billing exports for the last 90 days
- Named client-side owner for data-retention and procurement sign-off
- A staging environment where prompts can be replayed against at least two providers
- 1.Inventory every model call site across client deliverables and internal tooling
- 2.Tag each call site by task type: text, vision, audio, embedding, agentic tool use
- 3.Record current monthly spend and latency percentiles per call site
- 1.Collect data-retention and training-use terms from each shortlisted platform
- 2.Map retention terms against client contractual obligations
- 3.Flag any workflow where the current provider's terms are not defensible
- 1.Build a replay set of 50 to 200 real prompts per task type from client history
- 2.Define pass criteria per task type: accuracy floor, latency ceiling, cost cap
- 3.Confirm the scoring rubric with the client delivery lead
- 1.Run the replay set against the primary platform and one alternate
- 2.Log output quality, tokens per request and wall-clock latency
- 3.Note failure modes such as truncated context or malformed JSON
- 1.Score results against the rubric and rank providers per task type
- 2.Identify which tasks can move to a cheaper tier without quality loss
- 3.Draft the routing table mapping task type to primary and fallback model
- 1.Implement the routing layer behind a single internal interface
- 2.Add timeout, retry and circuit-breaker logic for each provider
- 3.Wire structured error logging so failures are attributable to a provider
- 1.Add per-client cost attribution to the routing layer
- 2.Set spend alerts at 70 and 90 percent of each client's monthly budget
- 3.Document the fallback trigger conditions in plain language
- 1.Run a failover drill by disabling the primary provider mid-request
- 2.Verify outputs still meet the rubric under fallback
- 3.Record recovery time and any quality delta for the client report
- 1.Replay the full prompt set against the final routing configuration
- 2.Compare cost and latency against the pre-project baseline
- 3.Capture before-and-after numbers for the handover deck
- 1.Write the routing policy document with change-control rules
- 2.Package the cost ledger and retention map as client-facing artifacts
- 3.Walk the client delivery team through the fallback runbook
Agencies charge setup fees in the low five figures because the work replaces a single-vendor dependency that turns routine pricing or rate-limit changes into delivery incidents. The monitoring retainer is defensible because routing tables decay as providers ship new tiers, and the agency is the only party holding the replay set that proves quality held. Margin comes from reuse: the replay harness and routing interface carry across clients, so the second engagement typically costs 40 percent less to deliver at the same price.
- Routing table mapping each task type to a primary and fallback model with trigger conditions
- Replay harness and scored benchmark report covering at least two providers
- Per-client cost ledger with spend alerts and monthly attribution
- Data-retention comparison matrix signed off by the client procurement owner
- Failover runbook with recovery times observed during the drill
The client's production workflows run through the routing layer, a simulated primary-provider outage completes on fallback within the agreed latency ceiling, and the client owner has signed the retention matrix and routing policy.