GPT-6 Astra vs Claude Fable 5.1: A Business Evaluation Checklist
Two frontier AI models arrived within days of each other: Anthropic released Claude Fable 5.1 on September 1, 2026, followed by OpenAI’s GPT-6 Astra on September 3, 2026. Both are designed for difficult reasoning, coding, research and long-running agentic work, and both carry the same headline API pricing of $10 per million input tokens and … Read more