Grok 4.5 tops the ranking of AI assistants for the browser: a new standard of autonomy
The ability of artificial intelligence to independently interact with web pages — from booking tickets to collecting data — is no longer science fiction. However, as the latest benchmarks show, not all models handle this task equally. The leader in this area unexpectedly became Grok from xAI, surpassing recognized industry giants.
Browser Use service founder Gregor Zunic conducted a comparative test of five leading AI assistants, evaluating their ability to perform actions on websites without errors. The key criterion was task execution accuracy: clicking buttons, filling out forms, and navigation. Here, Grok demonstrated a result that sets a new standard for the entire industry.
Who achieved the best result
According to the analysis data, Grok 4.5 successfully completed 76.42% of tasks — this is the absolute maximum among all tested solutions. Second place was taken by the assistant based on OpenAI with a result of 72.70%, using the GPT 5.5 model. Next are two solutions from Anthropic based on the Opus 4.8 model with scores of 70.75% and 67.92% respectively. Closing the top five is GPT via the OpenClaw plugin with a result of 60.38%.
It is important to note that the assistant's effectiveness directly depends on two factors: the base language model and the method of integration with the browser. For the same provider, as shown by Anthropic's tests, the difference in accuracy can reach almost three percentage points depending on the connection method.
What to consider
The results clearly demonstrate that under equal infrastructure conditions, the choice of AI model becomes the decisive factor. Grok 4.5, developed by xAI, not only catches up but confidently surpasses its competitors. This is a serious bid for leadership in the segment of autonomous browser agents — a technology that will radically change user interaction with the internet in the coming years.
As an analyst, I would note that Browser Use tests are not an abstract benchmark but a direct measurement of AI's practical utility. If Grok 4.5 maintains this pace of development, we may see xAI capture a significant share of the corporate web automation solutions market. OpenAI and Anthropic will have to seriously reconsider their approaches to avoid losing ground.