Engineering economics

Agentic development, with the meter visible.

Cinch publishes the consumption behind the proof of concept: infrastructure footprint, token volume, model mix, delivery evidence, and the caveats needed to interpret each number honestly.

POC ECONOMICS / SNAPSHOT 001Reconstructed
Tokens processed1.19B97.03% of input served from cache
Pilot run rate$45–60estimated / month
Delivery window91commits
Model roles2build + review
Actual invoicesnot connected
Cutoff Aug 10, 2026 · aggregate evidence only
Measured token countersReconstructed Git outcomesEstimated infrastructurePending provider invoices

Development consumption

Context is expensive. Reuse changes the curve.

1.19B tokens moved through the Codex context window during the first recorded app-engineering window. The dominant economic fact is not the headline total: 1.16B input tokens were served from cache.

01 / Total processed1.19B

1,194,890,784 input and output tokens across all included sessions.

02 / Cached input1.16B

97.03% of input reused previously processed context.

03 / Uncached input35.48M

The smaller portion of input that was not served from cache.

04 / Output2.2M

Includes 708.11K reasoning-output tokens.

Cached input · 97.03% Uncached input · 2.97%

Model mix

Different roles, separately visible.

01Primary engineering

GPT-5.6 Sol

981.89M

82.17% of processed tokens

gpt-5.6-sol
02Independent review

Codex automated review

213M

17.83% of processed tokens

codex-auto-review

Daily volume

A short, intensive build window.

Session start dates group the counters. They do not represent active hours or continuous human work.

  1. Aug 8
    484.96M
  2. Aug 9
    612.88M
  3. Aug 10
    97.05M

Delivery evidence

Consumption needs an outcome denominator.

Token volume becomes useful only when it can be interpreted beside shipped changes, tests, documentation, operating evidence, and quality gates. These Git numbers describe the same recorded window.

91reviewable commits

Small, named checkpoints across product and operating work.

72feature, test + docs commits

32 feature · 16 test · 24 documentation

51Kchanged lines

Across 360 unique paths; volume, not a quality score.

feature32
test16
documentation24
fix8
build3
other8

No labor conversion: Cinch does not translate tokens, commits, or changed lines into “developer hours saved.” That would imply a precision the evidence cannot support.

Infrastructure cost

A small pilot footprint, built for real operating behavior.

The documented August 2026 budget envelope is $45–60 per month before meaningful egress and optional monitoring growth. It covers the working topology—not a hypothetical single-container demo.

ESTIMATED MONTHLY ENVELOPEPublic-rate model
$4560

Always-on web availability, sync compute, managed Postgres, persistent replica storage, and wildcard TLS.

$0$60 alert
Actual project-scoped billing export: not yet connected
Application compute2 × shared-cpu-1x · 1 GB

Stateless web pair kept running for blue/green releases and host-failure tolerance.

Sync compute1 × shared-cpu-2x · 2 GB

Persistent pilot sync node; horizontal sync availability remains a planned milestone.

Primary data0.25–1 CU

Managed Postgres with an always-on replication floor, logical replication, and recovery controls.

Replica storage10 GB

Encrypted persistent sync replica with automatic snapshots and a tested rebuild path.

Public edgeIndependent

Cookie-free Vercel deployment with its own source, release identity, and rollback history.

Operations$60 alert

Monitoring treats the top of the pilot budget envelope as an early-warning signal, not a hard cap.

Development cost basis

Consumption is measured. Dollar attribution is deliberately withheld.

These sessions ran through ChatGPT-managed Codex. Applying API token prices would create an API-equivalent scenario, not an actual invoice. The portfolio therefore publishes token consumption and model mix now, and reserves a dollar total for a source that can support it.

Current basisPlan-billed

No per-session dollar charge is present in the local event logs.

Published todayTokens + models

Measured consumption is shown without pretending it is provider spend.

Future comparisonAPI-equivalent

A dated rate-card snapshot could model equivalent API cost as a clearly separate estimate.

Methodology & caveats

Every number carries a provenance label.

The snapshot can be regenerated without exposing the underlying conversations. Its data contract contains aggregate counters, dates, model identifiers, and Git statistics only.

01Measured

Codex token counters

Cumulative per-session counters are differenced and aggregated by model. Raw prompts, responses, local paths, and identifiers are never emitted.

02Reconstructed

Git delivery history

Commit metadata in the same time window supplies delivery context. Commit and line counts describe change volume—not quality or human-equivalent effort.

03Estimated

Infrastructure envelope

The application runbook records the deployed pilot topology and an August 2026 public-rate budget range. It is not a provider invoice.

04Pending

Actual billing feed

Fly, Neon, monitoring, and supporting-provider invoices are not yet normalized into a project-scoped cost export.

Included

Aggregate token fields · model labels · session counts · UTC dates · Git summary

Excluded

Prompts · responses · session IDs · local paths · user data · secrets · private infrastructure identifiers

See the operating model

Follow the architecture behind the economics.

Architecture & delivery