Open-weights roundup: DeepInfer released, V4.1 Flash builds 3D castle in 48 min for $0

Fanfulla @FanfulladevOriginally posted 2026.10.22

Open original on X

People saying China went quiet haven't checked open weights models this week - DeepSeek open-sourced DeepInfer, the engine serving V4.1 Flash on GitHub - MiniMax M3.1 Flash: 73.7% DeepSWE at $0.15/$0.60 per 1M (weights "later" tho) - Ornith-1.5-122B, MIT: 84.5% SWE-bench Verified on a single GPU - DeepSeek V4.1 Flash built a 3D castle in 48 min for $0, Sonnet 5.5 took 15 min and $1.2 The gap isn't quality anymore , look like it's wall-clock time