ACE Robotics · robot AI model
Kairos 3.1
China · 2026
Runs on G1 by Agibot · G1 by Unitree RoboticsSource and note: G1 (Agibot), G1 (Unitree Robotics)A github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026
Sources retrieved: 10 November 2026 (A, B, C)
- Model type
- World model World action modelSource and note: Model typeB huggingface.co/ACERobotics/Kairos3.1-4B-robot-480P · Retrieved 10 November 2026Note. Hugging Face model card: “Kairos is a 4B-parameter native cross-embodiment world model for unified understanding, generation, and action prediction.” The README also names the architecture: “Powered by a World-Action Model architecture and hybrid linear temporal memory, Kairos jointly predicts future visual states and executable robot actions”. The technical report is titled “Kairos: A Regret-Aware Native World-Action Model Stack for Physical AI”.
- What it controls
- Arms and handsSource and note: What it controlsA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos predicts executable robot action trajectories directly from visual observations and task context.” Kairos “generalizes across single-arm, dual-arm, and dexterous-hand platforms”.
- Inputs
- Camera LanguageSource and note: InputsA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos predicts executable robot action trajectories directly from visual observations and task context.” The inference examples list the mode “Text&FirstImage2Video”.
- Access
- Open weights (download)Source and note: AccessA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README news: “We've open-sourced the Kairos3.1 series, including World-Action Model inference code and three model weights”. The Hugging Face repository is listed as not gated (gated: false).
- Parameters
- 4BSource and note: ParametersB huggingface.co/ACERobotics/Kairos3.1-4B-robot-480P · Retrieved 10 November 2026Note. Hugging Face model card: “Kairos is a 4B-parameter native cross-embodiment world model for unified understanding, generation, and action prediction.”
- Licence type
- Free, commercial useSource and note: Licence typeA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos is open-sourced under the Apache License 2.0.” “Feel free to use, modify, and build commercial products on top of it.”
Specifications
9 of 14 stated 5 not stated
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Release1/1 disclosed
Released2 July 2026
Source and note: ReleasedA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. [A] README news, dated “Jul 2, 2026”: “We've open-sourced the Kairos3.1 series, including World-Action Model inference code and three model weights”
Input and output3/4 disclosed
Model typeWorld model World action model
Source and note: Model typeB huggingface.co/ACERobotics/Kairos3.1-4B-robot-480P · Retrieved 10 November 2026Note. Hugging Face model card: “Kairos is a 4B-parameter native cross-embodiment world model for unified understanding, generation, and action prediction.” The README also names the architecture: “Powered by a World-Action Model architecture and hybrid linear temporal memory, Kairos jointly predicts future visual states and executable robot actions”. The technical report is titled “Kairos: A Regret-Aware Native World-Action Model Stack for Physical AI”.
InputsCamera Language
Source and note: InputsA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos predicts executable robot action trajectories directly from visual observations and task context.” The inference examples list the mode “Text&FirstImage2Video”.
What it controlsArms and hands
Source and note: What it controlsA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos predicts executable robot action trajectories directly from visual observations and task context.” Kairos “generalizes across single-arm, dual-arm, and dexterous-hand platforms”.
Degrees of freedom controlledNot stated
Source and note: Degrees of freedom controlledA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. The README names supported platforms (“Native compatibility with Agibot G1, Unitree G1, and Songling PIPER”) but gives no number of controlled degrees of freedom.
Size and speed1/2 disclosed
Parameters4B
Source and note: ParametersB huggingface.co/ACERobotics/Kairos3.1-4B-robot-480P · Retrieved 10 November 2026Note. Hugging Face model card: “Kairos is a 4B-parameter native cross-embodiment world model for unified understanding, generation, and action prediction.”
Control rateNot stated
Source and note: Control rateA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. The README gives video generation times in seconds, not a control frequency, and claims “real-time edge-side deployment for embodied AI”.
Where it runs and what it is built on0/2 disclosed
On robot or cloudNot stated
Source and note: On robot or cloudC acerobotics.com/en/model · Retrieved 10 November 2026Note. The English website says “The World's First Embodied World Model with Native On-Device Robot Control, Self-Reflection and Self-Evolution”; the README gives inference times on A800 and RTX 5090 GPUs and says “Optimized for low-latency, high-reliability deployment across single or multi-GPU embodied systems.”
Base modelNot stated
Source and note: Base modelA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. The README says Kairos “learns physical, behavioral, and embodied knowledge from scratch, rather than relying on decoupled post-training adaptation”.
Openness3/3 disclosed
AccessOpen weights (download)
Source and note: AccessA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README news: “We've open-sourced the Kairos3.1 series, including World-Action Model inference code and three model weights”. The Hugging Face repository is listed as not gated (gated: false).
Licence documentApache License 2.0
Source and note: Licence documentA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos is open-sourced under the Apache License 2.0.” Hugging Face tag: “license:apache-2.0”.
Licence typeFree, commercial use
Source and note: Licence typeA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. README: “Kairos is open-sourced under the Apache License 2.0.” “Feel free to use, modify, and build commercial products on top of it.”
The developer’s own claims1/2 disclosed
Learns new tasksNot stated
Source and note: Learns new tasksA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. The README claims “significantly slashing development costs through zero-shot multi-task generalization” and releases separate checkpoints for the RoboTwin 2.0 and LIBERO-Plus benchmarks.
Works across robotsYes
Source and note: Works across robotsA github.com/DAXIAORobotics/kairos · Retrieved 10 November 2026Note. Developer claim, README: Kairos “generalizes across single-arm, dual-arm, and dexterous-hand platforms”. “Native compatibility with Agibot G1, Unitree G1, and Songling PIPER”.Yes only if the developer itself says the model runs on different robot models, for example robots from two manufacturers or two of one manufacturer’s models. Several units of the same robot do not count.
Notes
The Kairos 3.1 series has three public checkpoints: a 480P robot model described as “Embodied foundation model for generation”, and two checkpoints for the RoboTwin 2.0 and LIBERO-Plus benchmarks. The repository says “RoboTwin 2.0 and LIBERO-Plus support executable action prediction.” The repository news dates the introduction of the earlier Kairos 3.0 to “Dec 18, 2025”.
ACE Robotics writes the name as “Kairos World Model 3.1” on its English website and as Kairos3.1 in the repository.
ACE Robotics' June 2026 press release on the Kairos world model is datelined “SHANGHAI, CHINA”.
Sources
One line per source, not per figure: a source has one retrieval date.
- Agithub.com/DAXIAORobotics/kairosRetrieved 10 November 2026
- Bhuggingface.co/ACERobotics/Kairos3.1-4B-robot-480PRetrieved 10 November 2026
- Cacerobotics.com/en/modelMain source. Retrieved 10 November 2026
