Researcher says Anthropic blocks him over training related work
The point
Jiahao Shao's post is opinion. He says he never distilled Claude, his rollouts came from an open source model, and Claude only helped submit jobs and run analysis. He says Anthropic tagged him for training a competitor.
Why it matters
For builders, hosted model access for research automation can be flagged and cut by the provider.
Key details
- Shao says work touching RFT, SFT, or training larger models gets him blocked, downgraded from Opus 5.5 to Opus 5, or has the session killed
- The source is one user's account, with no Anthropic response
Original ~1 min → 25 sec here Source: X, Oct 31, 2026