Claude Opus 5.5

Trends

• Frontier capability gets cheaper with every release
• Frontier launches come under outside review and independent verification

Items

1. Sep 22

   Anthropic's Claude Opus 5.5

   The first Claude 5.5 model performs at Claude Fable 5.1's level on most work while costing 40% less to run than Opus 5, and posts Anthropic's strongest automated behavioral-audit alignment scores to date.