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Planned benchmark facet · ranking not published

Which models are best at functional implementation?

Implement required behaviours and state correctly.

This is the evaluation plan, not a model leaderboard.

No model order or score is shown. Candidate external benchmarks and planned first-party comparisons become evidence only after their exact release gates pass; retired benchmark grades are not reused.

First-party pairwise plan

Six distinct tasks for this facet

5

exploration tasks

Used for comparison coverage and calibrated refinement.

1

sealed holdout task

Kept out of model and judge tuning until release validation.

6

tasks in total

One of four equally weighted facets in this collection.

First-party, task-local pairwise comparisons with deterministic validators acting as hard gates. The final task remains sealed from model and judge tuning until release validation.

Collection-level external evidence map

Candidate benchmarks that can inform this skill

These sources are mapped to Frontend, UI & Web Apps, then identity-partitioned and lineage-deduplicated. They are supporting inputs, not a substitute for direct task-local pairwise results, and no score is reproduced on this page.

Design Arena

Website and UI arenas

Score feed not yet integrated
Evidence role
primary
Maximum directness
75%
Declared subject
foundation model
Usable lineages mapped
0

Capabilities: visual preference, ui quality.

  • • source is absent from the checked-in source registry

LMArena Leaderboard Dataset

Web development arena

Score feed not yet integrated
Evidence role
supporting
Maximum directness
50%
Declared subject
harnessed model
Usable lineages mapped
0

Capabilities: webdev preference.

  • • machine score field and protocol must be selected

OpenHands Index

OpenHands frontend

Mapped and runnable
Evidence role
primary
Maximum directness
80%
Declared subject
agent
Usable lineages mapped
1

Capabilities: frontend task completion.

Mapped fields: OpenHands Index — Frontend.

  • • metric subject identity differs from the editorial mapping; publish and calibrate each identity partition separately

Current blockers

Why no ranking is live

  • No approved combined collection artifact has been released.
  • The parent collection has not passed its publication gate.
  • No approved facet-level result artifact has been released.

Publication gate

What must pass first

  1. 1Combine at least one eligible external result with at least one first-party pairwise result.
  2. 2Retain at least 2 independent evidence lineages and 8 eligible model configurations.
  3. 3Complete at least 3 facet tasks with at least 80% required-task coverage.
  4. 4Show that this facet is materially distinct, then pass reliability and sealed-release stability checks.

Frontend, UI & Web Apps

Explore all four planned skills

Functional implementation Implement required behaviours and state correctly. Responsive accessibility Work across viewports, keyboard use, semantics, and contrast. Visual hierarchy Create coherent layout, typography, spacing, and emphasis. Brief fidelity and polish Reflect supplied product facts and finish the details that make the page usable.
Back to Frontend, UI & Web Apps Sources and safeguards