---
id: "2026-08-25-skild-ai-s1"
url: "https://postcutoff.com/e/2026-08-25-skild-ai-s1/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2026-08-25"
date_precision: day
category: robotics
importance: 4
confidence: high
status: [Confirmed]
sources: 4
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2026-08-25-skild-ai-s1/

# Skild AI's S1 learns 10-minute robot tasks from a single video prompt

Skild AI unveiled S1 on 2026-08-25, a robot foundation model that performs unseen long-horizon tasks (up to ~10 minutes, e.g. pancakes, pour-over coffee, potting a plant) from one video demonstration with no fine-tuning, reaching 66% success on unseen tasks vs 9% for a language-prompted policy.

## Key facts
- In-context learning from one video; tasks up to ~10 minutes and dozens of steps never seen in pretraining
- Success: 96% seen tasks, 66% unseen tasks vs 9% for language-prompting (~7x)
- One demo video ≈ 380 post-training episodes; 11 minutes from demo to autonomous execution (plant potting)
- Trained on teleop, human video, simulation and data-capture gloves; runs on arms, humanoids and quadrupeds
- NVIDIA (2026-09-10): Skild at $100M revenue run rate 10 months after first deployment; 60+ deployment partnerships

## What happened

S1 treats a human demonstration video as the prompt, the way an LLM takes an example in context. Skild says it is the first robotics foundation model to show in-context learning on extremely long-horizon tasks unseen in pretraining. S1 is in use with commercial partners; there is no public API. Skild also acquired Fetch Robotics assets (Zebra's robotics division, 2026-04-15; see [2026-04-15-skild-ai-acquires-zebra-fetch-robotics](https://postcutoff.com/e/2026-04-15-skild-ai-acquires-zebra-fetch-robotics/index.md)) to speed up deployment.

## Why it matters

Along with Generalist GEN-1.5 six days earlier, S1 marks the arrival of prompt-by-demonstration in robotics, a possible "GPT-3 moment" where adding a skill no longer needs a new training run. Results are company-reported.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): 117 days after its cutoff
- Claude Opus 5.5 (training cutoff June 2026): 56 days after its cutoff
- Gemini 4 Hydrogen (training cutoff March 2026): 147 days after its cutoff
- Grok 4.7 (training cutoff May 2026): 86 days after its cutoff

## Sources

1. [Skild AI: Introducing S1 — In-Context Learning for Robotics](https://www.skild.ai/blogs/s1) (skild.ai, official)
2. [Skild AI on X: Introducing S1](https://x.com/SkildAI/status/2092300842900865389) (x.com, official)
3. [The Robot Report: Skild AI unveils S1](https://www.therobotreport.com/skild-ai-unveils-s1-flagship-robot-foundation-model/) (therobotreport.com, press)
4. [NVIDIA blog: Skild AI taps NVIDIA physical AI to teach robots from a single video](https://blogs.nvidia.com/blog/skild-ai-s1-physical-ai/) (blogs.nvidia.com, press)

## Changes

- 2026-09-29: Linked the Zebra/Fetch acquisition entry
- 2026-09-29 (filed): Created

## Related

- 2026-09-17: [Figure Helix 2.5: humanoids do chores zero-shot in 30 never-seen homes](https://postcutoff.com/e/2026-09-17-figure-helix-2-5/index.md)
- 2026-08-19: [Generalist GEN-1.5 learns dexterous robot tasks from one demonstration](https://postcutoff.com/e/2026-08-19-generalist-gen-1-5/index.md)
- 2026-04-15: [Skild AI acquires Zebra Technologies' robotics division (formerly Fetch Robotics) to put its robot brain in warehouses](https://postcutoff.com/e/2026-04-15-skild-ai-acquires-zebra-fetch-robotics/index.md)
- 2026-01-14: [Skild AI raises $1.4B at $14B+ valuation for its 'omni-bodied' Skild Brain](https://postcutoff.com/e/2026-01-14-skild-ai-series-c/index.md)
- Models: [Skild S1 (Skild Brain)](https://postcutoff.com/m/skild-s1/) (`skild-s1`)