Kimi Webdev Bench
Models build games, 3D scenes and website clones from real prompts. Blind experts compare two outputs and report win, tie and loss rates.
In-house Moonshot AI evaluation. Kimi K3 is compared only against Claude Opus 4.8.
- Level
- Expert Specialists with years of training, often over hours of work
- Scored
- Ranked by votes People pick the better of two answers, as in an arena, and the votes are turned into ratings.
- Answers
- Code A program or patch run against tests.
Kimi K3 leads with 58.6%
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
- 1 Kimi K3 58.6%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Kimi K3 | 58.6% | Jul 2026 | Model card |
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Labs report it only in system cards
We read the headline results of 479 launch posts from 51 labs, and none of them list this benchmark. Some system cards do, below.
One system card reports it
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| 27 Jul 2026 | Kimi K3 technical report | 58.6 | Kimi Webdev Bench, overall win rate vs Claude Opus 4.8 under blind expert judging, tie 13.8, lose 27.6 (Table 4) | Capabilities |
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