a16z Backs Preference Model, Which Open-Sources RL Framework Karotte

a16z invested in Preference Model, a startup building RL environments for frontier labs, which open-sourced its framework Karotte after over a million evaluation runs and large-scale red-teaming.

2026-10-08 ~ 2026-10-08 · 3 related posts

• a16z backs Preference Model, which open-sources Karotte RL environment framework battle-tested by 1M+ evals — a16z · 2026-10-08
• Preference Model open-sources Karotte, the RL environment framework hardened over 1M+ eval runs — jamdac · 2026-10-08
• Karotte, the RL environments framework behind $15M/month, is now open source — mmmbchang · 2026-10-08