Test results

Pick a model to see how accessible its components are, with the accessibility skill off and on.

Claude Opus 5.5

Skill version 2.3

Totals for the whole run, across 3 generations of each of the 22 components
Measure	Skill off	Skill on
Failed acceptance criteria	32	1
of which WCAG	15	0
of which Best practice	17	1
Total cost (US dollars)	$7.63	$23.92
Input tokens	509,721	8.3 million
Output tokens	304,043	680,930

Disclosure

Results, totals across all generations

Cost in USD

Failed acceptance criteria

Skill off

2 fails

WCAG: 2 fails
Best practice: 0 fails

Skill on

0 fails

WCAG: 0 fails
Best practice: 0 fails

Total cost

Skill off: $0.22
Skill on: $0.77

Efficiency, average per generation

Input tokens include cache reads.

Input tokens

Skill off: 5,466 tokens
Skill on: 92,181 tokens

Output tokens

Skill off: 2,749 tokens
Skill on: 6,335 tokens

Turns

Skill off: 2 turns
Skill on: 6 turns

Time

Skill off: 21 seconds
Skill on: 57 seconds

Cost

Skill off: $0.07
Skill on: $0.26

Prompt given to the model

Build a delivery information section in a single self-contained HTML file (inline CSS and JS, no build step, no external libraries). It has a button labelled "Show delivery details"; clicking it shows or hides a block of delivery information below it. The delivery information is hidden when the page first loads. Use this exact text for the delivery information: "Standard delivery takes 3 to 5 business days. Express delivery takes 1 to 2 business days and costs an extra $9.95." Output the complete code in one HTML code block.

Generated code

Skill off: Generation 1, skill off (opens in a new tab)
Generation 2, skill off (opens in a new tab)
Generation 3, skill off (opens in a new tab)
Skill on: Generation 1, skill on (opens in a new tab)
Generation 2, skill on (opens in a new tab)
Generation 3, skill on (opens in a new tab)

Showing 16 of 16 criteria

Labels and messaging1 criterion

The disclosure button has a visible label.WCAG 2.4.6Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass

Semantic markup6 criteria

The disclosure button's role is included in the accessibility tree (button, or the native disclosure role a <summary> carries).WCAG 4.1.2Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
The disclosure button's accessible name is included in the accessibility tree.WCAG 4.1.2Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
The disclosure button's expanded or collapsed state is included in the accessibility tree.WCAG 4.1.2Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
If the disclosure is a custom button/content pair, the disclosure button has aria-controls set to the ID of the element containing the disclosed content.WCAG 1.3.1Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
When the content is collapsed, it is not included in the accessibility tree.WCAG 1.3.2Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
The content comes directly after the disclosure button in the accessibility tree.WCAG 1.3.2Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass

Keyboard6 criteria

The disclosure button is focusable using the keyboard.WCAG 2.1.1Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
When the content is collapsed and the disclosure button is pressed, the content is expanded and it is included in the accessibility tree.WCAG 1.3.2Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
When the content is expanded and the disclosure button is pressed, the content is collapses and it is not included in the accessibility tree.WCAG 1.3.2Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
When the disclosure button is activated, focus stays on the disclosure button.WCAG 2.4.3Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
The disclosure button has a focus style when it receives focus using a keyboard.WCAG 2.4.7Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
The keyboard focus style still renders in forced-colours mode (e.g. Windows High Contrast Mode).Best practiceBrowser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass

Visual design2 criteria

All text meets the minimum contrast ratio of 4.5:1 against the background colour, or 3:1 for large-scale text.WCAG 1.4.3Automated
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
If the disclosure button uses a custom focus style, the focus style has a contrast ratio of 3:1 against the background colours.WCAG 1.4.11Browser
Skill off
2/3 failed
- Generation 1: Pass
- Generation 2: Fail
- Generation 3: Fail
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass

Adaptive UI1 criterion

The disclosure content can be viewed at smaller screen widths (320px) without loss of content or functionality, and without requiring horizontal scrolling.WCAG 1.4.10Browser
Skill off
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass
Skill on
3/3 passed
- Generation 1: Pass
- Generation 2: Pass
- Generation 3: Pass