Sorry, Claude.
GPT-6 Astra vs. Fable-5.1. The verdict:

TL;DR
- ChatGPT-6 Astra is declared the winner, outperforming Claude Fable-5.1 in intelligence, speed, and cost.
- ChatGPT-6 Astra excels in computer use, a key focus of its launch campaign.
- Detailed guides are provided on accessing and effectively prompting both ChatGPT-6 Astra (using Work or Codex modes, Medium effort) and Claude Fable-5.1 (asking for more, giving full control, using sources correctly).
- Prompting tips for ChatGPT-6 Astra include setting clear goals, being selective with questions, specifying file roles, defining readable output, and correcting direction during execution.
- Prompting tips for Claude Fable-5.1 involve asking for more detail if needed, ensuring autonomous task completion, using sources effectively with "High" effort, and summarizing long chats to manage costs.