Claude Opus 5 is #1 in the World; Fable 5.1 Coming

The author claims Claude Opus 5 is now the world's best model, offering Fable 5-level performance at lower cost, and predicts Fable 5.1 will be a big jump, with no one else in the conversation.

• Anthropic
• frontier models
• Fable 5
• Claude Opus 5