---
title: "bench.rating.changed@1 · OpenVibe.Services"
canonical: "https://openvibe.services/docs/contracts/bench.rating.changed"
updated: null
---

# bench.rating.changed@1 · OpenVibe.Services

HTML: [bench.rating.changed@1 · OpenVibe.Services](https://openvibe.services/docs/contracts/bench.rating.changed)

# BenchRatingChangedPayload `bench.rating.changed@1`

Generated at 2026-11-13 06:25:48 UTC from [`openvibe-contracts v0.419.0`](https://github.com/OpenVibers/OpenVibe.Contracts/tree/v0.419.0) and [`openvibe-sdk v0.161.0`](https://github.com/OpenVibers/OpenVibe.SDK/tree/v0.161.0).

- Version: 1.0.0
- Owner: bench
- Visibility: first-party
- Status: active
- Compatibility: backward
- Schema: [`https://openvibe.network/contracts/events/payloads/bench.rating.changed.v1.json`](/docs/contracts/bench.rating.changed.json)

bench.rating.changed v1 (OpenVibe.Bench): a rating moved on a benchmark board. Envelope: source bench, subject { type: service, id: bench }, visibility first-party.

## Fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| `kind_id` | string | yes |  |  |
| `category` | string | yes |  |  |
| `subject` | string | yes |  |  |
| `elo` | number | yes |  |  |
| `games` | number | yes |  |  |
| `wins` | number |  |  |  |
| `losses` | number |  |  |  |
| `ties` | number |  |  |  |
| `win_rate` | number | yes |  |  |
| `ci_lower` | number |  |  |  |
| `ci_upper` | number |  |  |  |
| `median_cost_usd` | number \| null |  |  |  |
| `median_ms` | number \| null |  |  |  |
| `provisional` | boolean |  |  |  |
| `at` | string | yes |  | - `format date-time` |

## Examples

From the contract's own test fixtures: valid ones validate, rejected ones must fail.

 Valid: changed

~~~~
{
  "kind_id": "knd_01J8Z3Q4R5S6T7V8W9X0Y1Z2A3",
  "category": "model",
  "subject": "gpt-4o",
  "elo": 1502,
  "games": 11,
  "win_rate": 0.63,
  "at": "2026-10-28T18:05:00.000Z"
}
~~~~

Rejected: missing-elo

~~~~
{
  "kind_id": "knd_01J8Z3Q4R5S6T7V8W9X0Y1Z2A3",
  "category": "model",
  "subject": "gpt-4o",
  "games": 11,
  "win_rate": 0.63,
  "at": "2026-10-28T18:05:00.000Z"
}
~~~~

## Validate

~~~~
const contracts = require('openvibe-contracts');
contracts.validate('bench.rating.changed@1', value);   // { valid, errors: [{ path, message }] }
~~~~