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Progress bar with an exact fill width and track tokens

One task across 30 published runs. Inspect the scores and outputs together, with each run's execution method shown.

All experimentsModel resultsDesigner buildsCompare models
Task
PIXEL-0006
Domain
UI components
Difficulty
hard

Leading published run: claude-opus-4-8 (low reasoning) at 100.0% composite. Lowest: claude-haiku-4-5 at 0.0%. 30 published runs shown on this task.

How this task was evaluated

Results are ordered by this task's published score. API runs use one prompt and one completion; agent runs use a coding harness with tools and iteration. Inspect the execution method when comparing results.

Objective scores use the benchmark's execution checks. Judge scores use a vision panel's fixed rubric; the published score leaves out a model's own family. Missing values are labelled rather than treated as zero.

Read the brief

Build a single self-contained HTML file (`index.html`) that renders a determinate progress bar at 65 percent, with no build step and no network calls (inline all CSS, no external fonts or scripts). The grader measures the rendered geometry, so the fill must be exactly the right width, not roughly two-thirds. Track `<div id="track">`: - width 400px, height 12px, background #e2e8f0, border-radius 6px. Fill `<div id="fill">` inside the track: - width exactly 260px (65 percent of 400px), height 12px, background #6d28d9. Caption `<p id="caption">`: - font-size 13px, colour #475569, text "65% complete". The 260px fill, the 12px track height, and the 13px caption are the contract.

Anthropicclaude-opus-4-8
Low reasoning
Agent harness2026-07-21
claude-opus-4-8 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Medium reasoning
Agent harness2026-07-21
claude-opus-4-8 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
High reasoning
Agent harness2026-07-21
claude-opus-4-8 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Extra-high reasoning
Agent harness2026-07-21
claude-opus-4-8 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Max reasoning
Agent harness2026-07-21
claude-opus-4-8 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-4-6
High reasoning
Agent harness2026-07-21
claude-sonnet-4-6 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-5
High reasoning
Agent harness2026-07-21
claude-sonnet-5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-fable-5
High reasoning
Agent harness2026-07-09
claude-fable-5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Zhipuglm-5.2
default reasoning
API single-shot2026-07-17
glm-5.2 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Moonshotkimi-k2.7-code
default reasoning
API single-shot2026-07-17
kimi-k2.7-code rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Moonshotkimi-k3
default reasoning
API single-shot2026-07-17
kimi-k3 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.5
High reasoning
API single-shot2026-07-17
gpt-5.5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.4-mini
High reasoning
API single-shot2026-06-23
gpt-5.4-mini rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.6-sol
High reasoning
API single-shot2026-07-09
gpt-5.6-sol rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.6-sol
Max reasoning
API single-shot2026-07-09
gpt-5.6-sol rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.6-terra
High reasoning
API single-shot2026-07-09
gpt-5.6-terra rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.6-luna
High reasoning
API single-shot2026-07-09
gpt-5.6-luna rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Googlegemini-3.1-pro-preview
High reasoning
API single-shot2026-06-23
gemini-3.1-pro-preview rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Googlegemini-3.5-flash
default reasoning
API single-shot2026-06-23
gemini-3.5-flash rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Googlegemini-3.1-flash-lite
default reasoning
API single-shot2026-06-23
gemini-3.1-flash-lite rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.5
High reasoning
API single-shot2026-07-09
grok-4.5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.5
Medium reasoning
API single-shot2026-07-09
grok-4.5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.5
Low reasoning
API single-shot2026-07-09
grok-4.5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.3
default reasoning
API single-shot2026-07-03
grok-4.3 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.20-reasoning
default reasoning
API single-shot2026-06-25
grok-4.20-reasoning rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-build-0.1
default reasoning
API single-shot2026-06-25
grok-build-0.1 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-composer-2.5-fast
default reasoning
Agent harness2026-06-25
grok-composer-2.5-fast rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
DeepSeekdeepseek-v4-pro
default reasoning
API single-shot2026-06-25
deepseek-v4-pro rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
DeepSeekdeepseek-v4-flash
default reasoning
API single-shot2026-06-25
deepseek-v4-flash rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 100.0%
Open
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-haiku-4-5
High reasoning
Agent harness2026-07-09
claude-haiku-4-5 rendering of the Progress bar with an exact fill width and track tokens benchmark - composite 0.0%
Open
Composite 0.0%Objective 0.0%
Open outputFull run

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