
Claude Fable 5.1 vs. GPT-6 Astra: The Frontier Model Race Moves From Chat to Action
Anthropic’s Claude Fable 5.1 and OpenAI’s GPT-6 Astra arrive within days of each other, but the meaningful contest is no longer who writes the best answer. Both models are built for long-running agentic work across code, computers, research, and professional software. Their differences—in cost, computer use, scientific reasoning, safeguards, and deployment—show what enterprises should evaluate before trusting a model to act.











































