Anthropic blocks users for anything touching training larger models

Automated excerpt

I never distilled Claude—rollouts came from a strong open-source model; Claude just helped submit jobs and run analysis. Still got tagged for "training a competitor," and now anything touching RFT, SFT, or training larger models gets me blocked, Opus 5.5 downgraded to Opus 5, or the session killed outright. You built your models on the world's data, then treat paying users doing research automation as the enemy.

Selected automatically from source text; not independently written or fact-checked. Read the original for full context.