Persimmon: A User-Simulation Model for Training Long-Horizon Agents

Ampersand introduced Persimmon, a large-scale user-simulation model that realistically emulates human goals and behavior, and used it to train its agent Amp via RL over months-long open-ended simulations, requiring full-stack innovation from algorithms to infrastructure.

2026-10-21 ~ 2026-10-21 · 2 related posts

• Persimmon Launches Amp, an Agent Model Trained in Months-Long Simulations — Diyi_Yang · 2026-10-21
• Ampersand trains Persimmon, a large-scale user model that simulates human goals and behaviors — gharik · 2026-10-21