OpenAI faces rising pressure from rivals three years after ChatGPT's debut; Similarweb says Gemini users chat longer per visit than ChatGPT and Claude users
Three years since the debut of ChatGPT, the $500bn start-up is facing significant challenges to its dominance in AI
Context & Ripple Effects
OpenAI’s early ChatGPT rollout was shaped by concern that rivals could move first, as detailed in coverage of the rushed launch. Its subsequent ambition to make ChatGPT a work-oriented personal assistant made sustained usage—not just initial adoption—a central competitive test.
The Similarweb comparison adds an engagement signal to that rivalry. It also sits alongside OpenAI’s earlier work-assistant strategy, where deeper, repeatable interactions would matter more than headline visibility.
First-order effects
- Gemini gains a favorable comparative engagement signal: its users spend longer in conversations per visit than ChatGPT and Claude users, according to Similarweb.
- OpenAI’s claim to AI leadership faces more immediate scrutiny as competitors can point to usage quality, rather than merely product availability, as a differentiator.
Second-order effects
- The comparison raises the competitive premium on demonstrating recurring, substantive use; ChatGPT, Gemini, and Claude will be judged more directly on engagement as well as reach.
- Longer visits do not by themselves establish a stronger business: earlier paid-user retention data showed Gemini trailing ChatGPT and Claude, keeping conversion and retention as separate tests.
Third-order effects
- If the pattern persists, general-purpose AI assistants will compete less on first-mover status and more on a multi-part scorecard of engagement, retention, and usefulness for repeat tasks.
- That shift could make leadership more contestable: a large installed user base remains valuable, but it is less conclusive when rivals demonstrate stronger interaction depth.
The trend: Consumer AI competition is moving from launch-driven attention toward evidence of durable, high-engagement assistant use.