Anthropic's biggest rival on DesignArena is Anthropic.
Since July 2025, @claudeai models on our leaderboards have been dethroned 77 times. In 40 of those, the new leader was another Claude, usually a newer one. OpenAI's models took 1st from Claude 16 times, Moonshot's 10 times, and every other lab's 11 times combined.
@OpenAI and @GoogleDeepMind are different. When one of their models was dethroned, it was usually by another lab's model: 20 of 28 times for OpenAI, and 21 of 29 for Google.