5% of traffic. OpenAI models are a much higher percentage of revenue.
Codex has 20+ million users. They are doing much better than Cursor.
That's probably a lot more than their market share versus Claude Code and Codex.
Not really a surprise given their own models are the default option? Most people wouldn't change model. And if you want to use Claude or GPT you don't really have a reason to use Cursor over Claude Code or Codex