Anthropic's Amended S-1 Says Future Models May Imminently Meet Its RSP Threshold for Dramatically Accelerated AI Progress
On November 2 Anthropic filed Amendment No. 1 to its S-1 with the SEC, adding a risk disclosure: based on internal estimates and expectations about future models, not current ones, the company may imminently meet its Responsible Scaling Policy definition of dramatically accelerated progress attributable to AI. No current model has been designated as exceeding the threshold. Anthropic says it is evaluating the implications of meeting the AI R&D capability threshold, is considering RSP updates that would require human review and approval of certain R&D decisions, and does not expect to safely let Claude fully autonomously design and build successive frontier models without meaningful human supervision.
Key Takeaways
- Filing: Anthropic, PBC's Amendment No. 1 to Form S-1, filed November 2, 2026 (SEC filing), Registration No. 333-299633.
- Key line: based on internal estimates for future models, the company may imminently meet the RSP definition of dramatically accelerated progress attributable to AI; no current model has been designated as exceeding it.
- Proposed measures: possible RSP updates requiring human review and approval of certain R&D decisions; Anthropic also says it recently delayed pre-training a new frontier base model by more than a month to strengthen safeguards such as preventing weight exfiltration.
- Same filing (company figures): over 90% of contributions to Anthropic's codebase in September 2026 were written by Claude, and revenue for the three months ended September 30, 2026 was $17.0 billion.








