We just evaluated Grok 4.1 Fast (Reasoning) and Grok 4.1 Fast Non-Reasoning on all benchmarks!

We found that the reasoning variant consistently outperforms the non-reasoning variant - see our comparison page. Grok 4.1 Fast Non-Reasoning struggles - its best performance is tenth place on our IOI benchmark, while Grok 4.1 Fast (Reasoning) achieves strong performance across the board, placing third on our CorpFin benchmark.

Both models perform similarly to their predecessors - see our comparison pages for both the reasoning and non-reasoning variants. Like their predecessors, both models are also extremely cost-efficient on a per-token basis.

Congratulations to the SpaceXAI team for the launch of Grok 4.1!