Guide: Model Routing Lite Guide
Model Routing Lite Guide - Before using the biggest model: Sort task size; Find repeated questions; Match risk to model; Allow no AI; Review cost and behaviour
Model Routing Lite Guide
A practical guide for deciding when a task needs a small model, a stronger model, a reusable answer or no AI at all.
Before using the biggest model, ask whether the task is big enough to deserve it.
What this guide helps with
This guide helps teams create a simple routing rule for everyday AI use. It is not a technical architecture. It is a plain-language way to match the size and risk of the task to the right tool.
Why now
AI bills and usage limits become easier to manage when people know when to use which model. Without routing, every task can drift toward the most powerful option because that feels safest, easiest or most impressive.
The pattern
The pattern is that teams often solve uncertainty by spending more model power. But many tasks are predictable, low-risk or repeated. Those tasks need discipline, not maximum intelligence every time.
The check
Simple tasks include spelling fixes, short rewrites, category labels and repeated summaries. Medium tasks include comparing options or drafting based on several inputs. Complex tasks involve judgement, ambiguity, sensitive data, high stakes or multiple assumptions. This first sort gives people a way to think before they prompt.
If the same question is being asked again and again, the answer may need a saved template, FAQ, decision rule or small model, not repeated frontier-model calls. Reuse is often cheaper than recomputation. Ask what keeps being regenerated and whether it should become a reusable asset.
A low-risk internal rewrite may not need the strongest model. A high-stakes legal, finance, safety or customer-impacting task may need stronger reasoning and human review. Route based on risk and complexity, not vibes.
Some tasks are faster without AI: a known decision, a saved answer, a simple lookup, a button click or a human judgement call. “No AI” should be an allowed route, not a sign that someone is old-fashioned.
Write the rule where people work. Example: small model for simple rewriting, approved tool for internal search, stronger model for complex analysis, human review for external or high-risk output. If people have to guess, the default will win.
Do not only review cost. Review which tasks drove the cost. A high bill may be justified if it supports difficult work. A smaller bill can still be wasteful if it funds repeated low-value outputs. The useful question is: what did the spend change?
Model prices, capabilities and work patterns change. Review which tasks moved down to cheaper options, which tasks need stronger review and which prompts should become templates. Routing is not a one-time policy; it is a habit.
Quick examples
| Situation | Better question |
|---|---|
| Rewriting a short internal email | Use a small tool, saved tone template or no AI if the human can do it faster. |
| Summarising 100 customer complaints | Use a capable model, but define the output and review sample quality. |
| Drafting an external legal response | Use approved workflow, strong review and probably a human-owned final answer. |
| Repeated FAQ-style question | Turn it into a reusable answer rather than paying to rediscover it every day. |
The Satire
If every question gets the biggest brain, eventually finance will ask the smallest question: why?
Related Vieews paths
Chaos scenes spot the contradiction. Signals name it. Guides give you the next simple move.
Chaos
The Blue Blob and the Big Brain Button
The discovery scene that started this thread.
Signal
Not Every Task Needs The Most Expensive Brain
Use the signal when you want the pattern named clearly.
Playbook
AI Workload Waste Ledger
Use the heavier structure when needed.
Useful context
Use this guide as a light first step toward AI cost discipline. It can later become part of the AI Workload Waste Audit or Token-to-Outcome toolkit.
These are Vieews, not bibles. Use them as simple lenses, not legal advice, investment advice, HR advice or a replacement for doing your own investigation. If a line makes the spreadsheet uncomfortable, excellent. Ask one more question and tug on that thread.
