Specification · Class 2 · calculated — arithmetic on assessments or third-party prices
Grid Inference Spread · Grid Inference Spread — RW-S and RW-L
Frontier-API workload cost minus the cheapest hosted open-weight path cost for the same reference workload, in US$/day, for RW-S and RW-L. Positive = frontier premium — the switch trigger as a daily number.
series ids grid_inference_spread_s · grid_inference_spread_l · methodology v1.0 · unit usd_per_day
Ⅰ · Class and status
Part B class · print status · latest print of recordClass 2 · calculatedPrinting
Class — and why
Arithmetic on two RWI paths — compute's crack spread (derived-instruments decision of record, 2026-07-24). Inherits the RWI v1.0 disclosure on every surface.
Latest print of record · read from storage, not recomputed
| Series id | Registry label | Methodology | Latest print | Value | Note |
|---|
| grid_inference_spread_s | Grid Inference Spread (RW-S) | v1.0 | 2026-09-09 | $2.16/day | inception 2026-07-24 |
| grid_inference_spread_l | Grid Inference Spread (RW-L) | v1.0 | 2026-09-09 | $191.60/day | inception 2026-07-24 |
Ⅱ · Specification
A4 field template · honest current state · n/a fields shown, not hidden| Codes | grid_inference_spread_s · grid_inference_spread_linception 2026-07-24 |
| Construction | rwi_{w}_frontier_api − rwi_{w}_open_apisign locked: positive = frontier premium (registry header) |
| Currency / unit | US$ per day |
| Assessment close | 18:30 UTC — the scheduled daily cycle anchor |
| Submission cut-off | n/a |
| Publication time | With the daily print (masthead: 04:30 AEST) — on the briefing, /instruments, the daily report, /api/print/<date> (permanent) and MCP. |
| Data hierarchy applied | Inherits the RWI API paths — published list prices, no transactions. |
| Accelerator class / contract basis / term / region | n/a — API-path spread |
Ⅲ · Normalisation and construction rules
the named adjustments, in order- None beyond RWI's own — the print is the subtraction of the two stored paths of the same date.
Ⅳ · Minimum observations and withholding
below which the print is flagged · below which it is not publishedPrints only when both paths printed on the date.
Ⅴ · Disclosures
verbatim from the derived-series registry · the same string every surface carriesGrid Inference Spread (inherits RWI v1.0) — v1.0 is token-denominated; models differ in tokens-per-task; efficiency-adjusted v1.1 in development.
Ⅵ · Revision history
dated changelog for this code · never rewritten| Date | Version | Change | Reference |
|---|
| 2026-07-24 | v1.0 | First print with RWI (derived-instruments decision of record, 2026-07-24). | scripts/compute_rwi.py |
Ⅶ · Downstream, surfaces, notices, sources
where it flows · where it shows · what governs itDownstream series
None.
Surfaces
- /instruments §Ⅲ
- /api/print series.grid_inference_spread
- /api/mcp get_reference_workload_cost
Notices that govern this code
No methodology change notice attaches to this code.
Sources of record
scripts/compute_rwi.pyscripts/derived_series.py ↔ dashboard/lib/derived-series.ts
This page renders the method of record for Grid Inference Spread; it does not define it. Printed values are never rewritten — a change in method is announced by notice before it affects a print (publish-before-effect); a correction restates only what the day’s own information set supported. Permanent print URLs: /api/print/<date>.