The Forerunner K1 is the original full-size humanoid robot from Shanghai Kepler Robotics, released in November 2023. Kepler is focused on "blue-collar" humanoids built for industrial labor. The K1 took the company's Forerunner platform to CES 2024, positioning it as a direct challenger to Tesla's Optimus, and it established the architecture — proprietary planetary roller-screw actuators, dexterous hands, and the NEBULA/Kepler OS software stack — that the later K2 refined.
Price Range
Kepler has consistently targeted an aggressive, low price point for its Forerunner humanoids — repeatedly citing a roughly $20,000–$30,000 range for production units (some early estimates ran higher). The K1 was an early-generation industrial unit sold into pilot deployments and developer programs via Kepler's channels.
| Basis | Figure |
|---|---|
| Kepler target price range (Forerunner line) | ~$20,000 – $30,000 |
| Availability | Early-generation industrial platform; superseded by the K2 |
Full Specifications
| Spec | Value (reported) |
|---|---|
| Height | ~1.78 m (~2 m cited for some Forerunner configurations) |
| Weight | ~85 kg |
| Degrees of freedom | ~40 |
| Hands | Kepler dexterous hand, 12 DOF |
| Actuation | Proprietary planetary roller-screw actuators (arms/legs); custom rotary actuators (waist/shoulder) |
| Payload | Total payloads up to ~25 kg |
| Battery | ~8-hour endurance |
| Software | Kepler OS developer platform; NEBULA system |
| Released | November 2023 |
Model Breakdown
The K1 is the first-generation Forerunner and the foundation of Kepler's humanoid line (the Forerunner series has also been described with K1/S1/D1 configuration variants). It was succeeded by the more capable K2, which Kepler describes as its fifth-generation design.
Buyer's Guide: What to Know
The K1 is first-generation hardware. Kepler's current platform is the K2. New buyers should evaluate the K2; the K1 is the architectural starting point.
The roller-screw actuators are Kepler's signature. Planetary roller-screw actuation is what gives Kepler robots strong, precise limb movement — a design carried into the K2.
Kepler competes on price. A ~$20–30k target for a full-size industrial humanoid was central to Kepler's pitch from the K1 onward.
8-hour battery life stood out. Long endurance for industrial shifts was a K1 strength and remains a Kepler focus.
K1 vs Similar Robots
- K1 vs Kepler Forerunner K2: The K2 is the direct successor — 52 DOF, far more sensors, more onboard compute, and improved hands.
- K1 vs Unitree H1: Both early full-size Chinese humanoids; the K1 leaned industrial/blue-collar, the H1 toward research and locomotion.
- K1 vs AgiBot RAISE A1: Both are first-generation Chinese industrial humanoids from 2023; each launched its company's full-size line.
Source: Kepler Robotics
