Blog
Longer pieces that sit behind the reference pages: how graders work, what is open and free, and what has been published on cost. Each one lists its sources at the end.
- grading / November 7, 2026
How do labs grade agents inside an RL environment?
How labs grade agents in an RL environment: test-based verifiers, end-state checks, rubrics and model judges, and how agents game each one.
- open source / November 7, 2026
Open-source environments and environment hubs: what is out there?
Open-source RL environments and hubs: what Prime Intellect's Environments Hub offers, open training tools, and what to check before you build on one.
- costs / November 7, 2026
What does one RL training task cost to build?
RL training task cost, from Epoch AI's interviews: $200 to $2,000 in most cases, why some reach $20,000, and how exclusive rights multiply it.
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