Woofun AI data shows that GPT-5.6 Sol secured the top position on Design Arena's Front-end Design Leaderboard with a score of 1353 Elo. This result places it slightly ahead of GLM 5.2, which scored 1351, while Claude Fable 5 ranked third with 1345 points.

The evaluation focused on the "Non-Agent" category, where models were restricted from using search, terminal, or file editing tools and could not perform multiple revision rounds. Participants were required to generate a complete single-file HTML webpage based on prompts, with outputs compared pairwise by real users. GPT-5.6 Sol demonstrated a 60 Elo advantage over GPT-5.5, resulting in an 18-position lead, and was identified as the fastest model among those with equivalent performance.