Difference between S1 and S2 (prompt template)

[TianpengBu]

Hi authros,

Great work! I am wondering how the prompt options work in the evaluation script. As it shown, there are two prompt-styles, S1 follows OpenCUA while S2 follows Qwen3-VL. Do they work both in the same model, such as EvoCUA-8B? Or they work for individual models trained on these two system prompts?

Best,

[PaulChongPeng]

Currently, both EvoCUA-32B and EvoCUA-8B available on Hugging Face are designed to work with S2-style prompts. The S1-style prompt is only used internally for our experimental OpenCUA base version.