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Creating fully autonomous AI assistants capable of independently navigating websites, clicking buttons, filling out forms, and collecting data is no longer science fiction. Recent tests show that the Grok model from xAI demonstrates the highest efficiency in this segment, outperforming solutions from OpenAI and Anthropic.

The tool built on the Grok model achieved an impressive result of 76.42% successfully completed tasks. This places it first among the five tested assistants. Next is the assistant from OpenAI with a score of 72.70%, while solutions from Anthropic took third and fourth positions with results of 70.75% and 67.92%, respectively. Rounding out the ranking is GPT with the OpenClaw plugin, which managed only 60.38% of tasks.

The key takeaway from this comparison: all else being equal, the choice of the underlying AI model is crucial. In this test, Grok 4.5 demonstrated superiority in understanding context and accuracy of action execution. It is worth noting that even for a single developer—Anthropic—the difference in results between two methods of connecting to the browser was nearly three percentage points, highlighting the importance of integration architecture.

What Lies Behind the Numbers

Each of these assistants uses its flagship model: Grok runs on Grok 4.5, OpenAI on GPT 5.5, and Anthropic on Opus 4.8. It is the assistant's "brain" that handles decision-making logic, while the browser control interface merely adds the ability for physical interaction with web pages. The results clearly indicate that Grok 4.5 is currently best adapted for the role of a browser agent.

The market for autonomous AI agents is just emerging, and Grok's leadership is a serious statement. If xAI can scale this success and integrate the technology into real business processes—from booking tickets to collecting marketing data—we will witness a paradigm shift in internet interaction. Competitors should take note: simply improving the language model is no longer enough.