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GPT-6 Astra and Claude Fable 5.1 Set a New Benchmark for Agentic AI

  • Foundation Models
  • AI Agents
  • Software Dev & Coding

OpenAI’s GPT-6 Astra and Anthropic’s Claude Fable 5.1 are competing to move AI from answering prompts to completing long, multi-step professional work. Their published evaluations show different strengths: Astra leads several computer-use, cybersecurity and coding tests, while Fable 5.1 emphasizes long-running agents, coding workflows and lower-cost cached workloads.

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