@misc{physladder2026,
  title = {How High Can GPT-6 Astra Climb in Contact-Rich Manipulation? PhysLadder: A Hierarchical, Matched Sim--Real Benchmark for Physical Interaction},
  year = {2026},
  howpublished = {Research software},
  url = {https://github.com/PhysLadder-Benchmark/PhysLadder},
  note = {Software citation. Paper authors, venue and persistent identifier will be added when finalized.}
}