Monthly Joint Reading · April 2026

For Acme Corp (DEMO) · Period 2026-04-01 to 2026-04-30

acme-pilot saved $63,000 in April 2026.

Total measured savings this period

$63,000

reduction of 34.6% versus ratified baseline

You keep · 80.0%

$50,400

Direct cost reduction retained by acme-pilot, net of the Performance Fee.

Tessera earned · 20.0%

$12,600

Performance Fee, debited from prepaid balance against measured savings per §4-§5 of the Tessera Terms of Service.

Joint baseline

182k

re-priced at this month's volume

Actual cost paid

133k

across all in-scope workloads

Reduction

34.6%

below baseline · this period

Performance Fee · 20%

12.6k

invoiced at Day 60 · per §4.3

Spend trend

Joint baseline (gray) vs actual paid cost (olive) over the last six readings

The gap between bars is the measured Ongoing Savings.

II.

Per-workload breakdown

5 workloads this period · indicator reflects reduction versus its anchored baseline

Workload-level snapshot. Columns: status, workload, request count, baseline cost, actual cost, savings, and reduction percentage per workload.
Status	Workload	Provider · model	Requests	Baseline	Actual	Saved	Reduction
Optimized	product-search-summarize	OpenAI · gpt-4o-2024-08-06	280,000	42.0k	24.0k	18.0k	42.9%

III.

What to fix next

Open optimization opportunities ranked by projected monthly savings · plus recent implementations for accountability

Implemented · Implemented

Opus → Sonnet swap on support-classifier (90% of intents are clear-cut)

Model routing · 2 engineering-days · reversible within day · quality risk low

Support classifier evaluation set (200 golden examples) shows Sonnet-4.x preserves 96% accuracy on the 90% of cases where the intent is unambiguous. RouteLLM router handles the 10% edge cases on Opus. Implemented Mar 2026.

Projected · per month

24.0k

range 20.0k – 28.0k

Recommended · In progress

Route 70% of product-search traffic to gpt-4o-mini

Model routing · reversible within hours · quality risk medium

Promptfoo eval shows gpt-4o-mini matches summarization quality on 92% of test set. Route by complexity heuristic.

IV.

Savings trajectory

Measured savings delivered each closing period

Methodology in four points

iOngoing Savings = Joint Baseline cost (anchor blended cost × actual request volume) − actual paid cost, summed across in-scope workloads.
iiWorkloads without a ratified anchor covering the period are excluded from savings — their actual cost is shown for transparency only.
iiiProvider price moves, unrelated workload shrinkage, and seasonal volume effects are excluded per §6 of the Tessera Terms of Service.
ivIf period savings are zero or negative, Performance Fee is zero (drift floor, §3.7); the Monitoring Fee remains due.

VI.

Audit trail · countersignature

Reading version

Computed at

2026-05-01 02:14:00 UTC

Drift floor

Not triggered

Acknowledgement of this Reading constitutes acceptance of the Ongoing Savings figure and the Performance Fee derived from it. Disputes are governed by §18 of the Tessera Terms of Service — fifteen calendar days from issuance, in writing, with disputed portion withheld from balance debit and undisputed portion debited normally.

Fintechagency OÜ d.b.a. Tessera

Name · title · date

Acme Corp (DEMO)

Name · title · date