# Strategy & Architecture Source: https://customlabs.io/topics/strategy-architecture/ Updated: 2026-09-14 Topics # Strategy & Architecture Build, buy, or skip; lock into one model provider or stay agnostic — these architectural calls compound over the life of a system. This is our work on making them deliberately instead of by default. Start with The Applied AI Handbook if you're deciding what to build. It's for leaders weighing build-vs-buy and architecture calls that compound over the life of a system. In the Handbook [01 Decide](https://customlabs.io/handbook/decide/)[02 Design](https://customlabs.io/handbook/design/)[03 Build](https://customlabs.io/handbook/build/)[05 Operate](https://customlabs.io/handbook/operate/)[06 Cost](https://customlabs.io/handbook/cost/) ## Guides ### The Applied AI Handbook A six-stage handbook for shipping applied AI: decide, design, build, evaluate, operate, cost, each linked to the reference material behind it. [Read →](https://customlabs.io/handbook/) ### Choosing an AI Delivery Partner How to interrogate any AI delivery partner, us included, across every gate that matters. It ends with the cases where we're the wrong call. 28 min read [Read →](https://customlabs.io/choosing-a-partner/) ### The Agent Adoption Playbook The pilot worked. How the rest of your engineers actually start using it, and the numbers that separate real adoption from seat activation. 33 min read [Read →](https://customlabs.io/adoption/) ## Architectures ### An assistant inside a product you already ship An assistant embedded in a product you already ship, scoped to that signed-in user's own data and permissions. 7 min read [Read →](https://customlabs.io/architectures/in-product-copilot/) ### Model-agnostic inference gateway One call site in front of every model provider, so a price change or an outage is a config change, not a rewrite. 6 min read [Read →](https://customlabs.io/architectures/model-gateway/) ### A coding-agent delivery fleet A control plane for running many coding agents at once without them colliding on the same files or losing track of what any of it costs. 7 min read [Read →](https://customlabs.io/architectures/agent-delivery-fleet/) ## Comparisons July 22, 2026 ### Open-Weight Models vs Frontier APIs: The Real Cost/Control Tradeoff Self-hosting an open-weight model looks cheaper on paper than it behaves in practice. The real tradeoff against a frontier API, and when each one is right. 7 min read [Read →](https://customlabs.io/compare/open-weight-vs-frontier-api/) July 22, 2026 ### RAG vs Fine-Tuning: Which One Actually Solves Your Problem Retrieval and [fine-tuning](https://customlabs.io/glossary/fine-tuning/) solve different problems but get reached for interchangeably. How to tell which one your case needs, and why we default to retrieval. 8 min read [Read →](https://customlabs.io/compare/rag-vs-fine-tuning/) ## Insights July 10, 2026 ### Model-Agnostic by Design Models change under you every few months: price, quality, and capability. Here's why we never hardcode a single provider into a client's feature. 7 min read [Read →](https://customlabs.io/insights/model-agnostic-by-design/) May 19, 2026 ### Build, Buy, or Skip: A Framework for AI Decisions A technically honest framework for deciding whether an AI initiative should be built in-house, bought off the shelf, or skipped entirely this year. 7 min read [Read →](https://customlabs.io/insights/build-buy-or-skip/) ## Case studies July 7, 2026 ### The AI-Native Target That Wasn't: A Two-Week Diligence A growth-equity firm's term sheet on an 'AI-native' SaaS target got repriced after a two-week check found $1.4M of hidden re-platform cost. 7 min read [Read →](https://customlabs.io/case-studies/ai-diligence-flagged-replatform-cost/) June 16, 2026 ### Cutting Inference Spend 40% Without Betting on One Vendor A Series B fintech's LLM spend outran revenue on one provider. Model-agnostic routing cut unit cost, vendor risk, and closed a data-residency gap. 7 min read [Read →](https://customlabs.io/case-studies/model-agnostic-routing-cut-inference-spend/) ## Tools ### AI Readiness Scorecard A fast, honest read on whether your data, infra, and process are ready to ship AI. [Read →](https://customlabs.io/tools/ai-readiness/) ### Architecture Picker Which system shape you should actually build, from seven questions about the problem. [Read →](https://customlabs.io/tools/architecture-picker/)