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Code Arena WebDev leaderboard

Assess

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A leaderboard for evaluating front-end web development and agentic coding tasks.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by model releases, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

  • 8Simon Willison·6/17/2026model_release
    GLM-5.2 open weights model lands with 1M context

    Z.ai has released GLM-5.2 as open weights under an MIT license after an earlier limited rollout to coding subscribers. The text-only Mixture-of-Experts model has a 1 million token context window and is being reported as the leading open weights model on independent benchmarks, though it is relatively token-hungry.