Xiaomi: MiMo-V2.6-Pro-UltraSpeed

Xiaomi's MiMo-V2.6-Pro-UltraSpeed, created on September 21, 2026, is positioned as a fast-speed variant of their flagship model, built from the same 1T checkpoint. Despite its "UltraSpeed" designation, the model exhibits longer response times, ranking in the 8th percentile for speed across benchmarks. It also tends to be positioned at premium pricing levels, ranking in the 16th percentile for cost. However, a significant strength is its exceptional reliability, boasting a 99% success rate across all benchmarks, indicating minimal technical failures. In terms of performance across categories, MiMo-V2.6-Pro-UltraSpeed demonstrates strong capabilities in Reasoning (98% accuracy, 85th percentile) and Coding (94% accuracy, 79th percentile). Its General Knowledge is also robust at 99% accuracy, though its percentile ranking is moderate (55th). The model shows good performance in handling Hallucinations (98% accuracy) and Email Classification (98% accuracy). Instruction Following is decent at 72% accuracy, while Mathematics (93% accuracy) and Ethics (99% accuracy) are solid, though their percentile rankings are average. The primary weakness lies in its speed, with consistently high duration times across all benchmarks, contradicting its "UltraSpeed" branding.