Grok 4.5 has surged ahead: who is the best at managing the browser?
The market for AI assistants is rapidly evolving. Today, we are witnessing the emergence of agents capable not just of answering questions, but of independently navigating websites: opening pages, clicking buttons, filling out forms, and collecting data. These are no longer just chatbots — they are full-fledged virtual assistants that can book a ticket or conduct a competitor analysis at your request.
As part of an independent analysis conducted by the Browser Use development team, five leading tools based on various AI models were tested. The key metric was the accuracy of task completion on websites — the percentage of successful attempts without errors.
Test Results: Grok Leads the Way
The undisputed leader was the assistant based on the Grok 4.5 model from xAI. Its accuracy rate was 76.42%. This is the best result among all participants. In second place was the agent from OpenAI based on GPT 5.5 with a result of 72.70%. The third and fourth spots were taken by two assistants from Anthropic (Opus 4.8 model) with scores of 70.75% and 67.92%, respectively. Rounding out the top five is GPT via the OpenClaw plugin, which managed only 60.38% of tasks.
It is important to emphasize that all agents operated under identical conditions, making the results as objective as possible. The difference in performance is directly attributable to the quality of the underlying model and the method of its integration with the browser. Even within the same developer — Anthropic — the difference in results was nearly three percentage points depending on the connection method.
What Does This Mean for the Market?
The results clearly demonstrate that the AI model race is entering a new phase — the phase of practical application. A model capable of effectively interacting with web interfaces gains a tremendous competitive advantage. Grok 4.5 is not just catching up but confidently overtaking established giants, confirming xAI's significant technological edge.
My analysis: Grok's superiority in browser-based tasks is a signal for the entire market. We see that the future lies not with "talking heads," but with agents that know how to act. Investors and developers should closely watch how this technology will be monetized, as autonomous web agents could radically transform e-commerce, logistics, and data collection.