A baseline has an expiry condition
A business case compares alternatives available for a particular task at a particular time. Price changes, new model versions and new caching behaviour can change the baseline without changing your task. Record the pricing date and define when the comparison must be repeated. Do not describe a historical saving as a permanent advantage.
Cut the right line
A 50% reduction in inference pricing is not a 50% reduction in the whole API service cost. In the synthetic extraction fixture, inference is $5,000 of a $9,000 monthly total. Halving that inference line reduces recurring API cost to $6,500, assuming unchanged review and operations. Against a $7,900 specialist, the monthly saving becomes negative. No positive payback exists in that sensitivity.
Include improved quality
A new baseline can also reduce review effort or improve accepted-task yield. These changes affect both numerator and denominator. Conversely, migration and evaluation have costs of their own. Compare the deployable alternative, including the work to qualify it, rather than simply taking the lowest public token price.
Write reversal conditions before approval
Agree a threshold that reopens the decision: an API price change, a lower-volume quarter, a material quality improvement or an increased maintenance burden. Require portable artefacts and a tested fallback to preserve options. If the investment only works while the comparator remains frozen, label that dependence explicitly in the approval brief.
Bring to the decision review
Keep a simple reversal register: trigger, comparison to repeat, decision owner and response deadline. For example, an observed price reduction triggers a revised cost model, while a model-version change triggers both a protected evaluation and revised review estimates. The trigger does not automatically choose a new supplier or cancel a contract. It starts a controlled re-evaluation with the same acceptance policy.
Sources & editorial record
This is Frontier Development’s decision framework. The references below support the general technical concepts; the worked scenarios and procurement questions are our analysis.
References accessed 16 October 2026. No current price, product availability or legal clearance is asserted. Published study findings are attributed above; this guide reports no Frontier Development experiment. Read the comparison method.
Review history and research boundary
Edition 1.1 · 16 October 2026: added claim-level attribution, explicit evidence boundaries and links to the flagship synthesis. Published by Frontier Development. No named external technical reviewer is recorded. This guide provides a decision framework; it is not a Frontier Development experimental result.
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