AI Infrastructure Rule: Route Through a Gateway Before You Sign a Second Model Contract
Should an agency add a second model provider directly, or put a routing layer in front of the first one before scaling client delivery? Stand up a multi-model routing layer (an AI gateway or orchestration proxy) before adding a second direct provider integration, so provider swaps are a config change rather than a rebuild.
By InnovaAI ResearchPublished
“Should an agency add a second model provider directly, or put a routing layer in front of the first one before scaling client delivery?”
Stand up a multi-model routing layer (an AI gateway or orchestration proxy) before adding a second direct provider integration, so provider swaps are a config change rather than a rebuild.
Agencies wire the first provider's SDK directly into the client build because it ships fastest, then discover at the second integration that caching, retry logic, and cost attribution have to be rebuilt for each provider, turning a two-week swap into a re-scoped change order.
Provider concentration is a structural risk, not a hypothetical: OpenAI raised roughly $11B against a $30B target while Microsoft committed about $170B to AI infrastructure, so pricing and roadmap cadence at the top of the stack will keep moving. Gateways such as Helicone, Portkey, and TrueFoundry exist precisely to absorb that movement, proxying requests across providers with caching, fallbacks, and per-request cost logging. Anthropic's watermark rollout, which covers four additional Claude models but leaves two older models outside detection, shows that even a single vendor's compliance posture varies by model version, which a routing layer lets an agency respond to without touching client code.
- •A retainer client's AI feature is moving from prototype to production and the agency is about to commit to a second provider for redundancy
- •Token spend on a single client account has crossed the point where a provider price change would dent the retainer margin
- •Delivery teams are hard-coding provider SDK calls into client applications with no shared abstraction
- •An EU-market client needs watermarking or content provenance guarantees that vary by model version