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.
- Made by
- Moonshot AI
- Released
- July 2026
- Kind
- Web and app front ends
- Level
- Expert
- Scored
- Ranked by votes
- Answers
- Code
- Tasks
- Kept private
- Strongest model tested
- Kimi K3 #24 on the capability index
- Last in a system card
- July 2026
- Last model added
- July 2026
Only Kimi K3 has a rating here, from its lab’s own post
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. A rating ranks a model only against others rated in the same arena at the same time, so these don’t show who leads.
- 1 Kimi K3 58.6%
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Kimi K3 | 58.6% | Jul 2026 | Lab model card |
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Labs’ model cards
Labs report it only in system cards
We read the headline results of 522 launch posts from 52 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 |
|---|---|---|---|---|
| Jul 27, 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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