Observed arrival · 2026-10-24
Sandworld’s app twins for AI agents
Sandworld offers simulated app environments and verified tasks for teams training or evaluating AI agents.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- AI labs training and evaluating agents
- Worth noticing
- The Quickbasket comparison marks an order as failed because the agent chose the wrong delivery slot, despite placing the order.
Field notes
Sandworld says its catalog covers seven environments—six app twins plus one cross-app setting—with 201 tasks and 127 agent tools. The homepage’s Quickbasket example exposes tool calls and verifier output for two runs of the same grocery-order request; it identifies both as real episodes computed from the twin at seed 1.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue