Xiuyu Li(@sheriyuo):FrontierCS 2 really is a solid benchmark. Step 5 Preview looks… rough, but we’ll focus on improving that! Thanks for the support. btw the harness does affect the results a bit too lol.

Xiuyu Li

@sheriyuo

Researcher @StepFun_ai | Working on long-horizon tasks | Opinions are my own

Joined February 2026

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Xiuyu Li@sheriyuo

2026.10.27 07:36

FrontierCS 2 really is a solid benchmark. Step 5 Preview looks… rough, but we’ll focus on improving that! Thanks for the support. btw the harness does affect the results a bit too lol.

Qiuyang Mang@MangQiuyang

2026.10.27 05:58

Kimi K3.1 Pro ties GLM 5.3 on pass rate (12/48) and edges it out on continuous score (50.9 vs 48.9), making it the best open-source model on FrontierCS 2's open-ended CS research tasks 🌙