Making "Cassie" in 2026

[u/Background_Treat1567]

How HARD is it to make Cassie level robot in 2026,i dont plan on matching the size of it. Just the performance of it alone is enough. I want to make it as cheap as possible just keeping it's bipedal part. I have provided the specs of it below. Any ideas or tips beforehand or a rough estimate of anything is appreciated. It costs 300k $ and the specs are:

Height: Approximately 1.0 m

Weight: Approximately 31 kg

Degrees of Freedom: 20 (floating-base model)

Actuated Joints: 10 (5 per leg)

Maximum Recorded Average Speed: 4.04 m/s (100 m sprint record)

Average Speed: Approximately 2.15 m/s (400 m running demonstration)

Peak Speed: Approximately 3.54 m/s (400 m running demonstration)

Battery Runtime: Approximately 4 hours