GPT-6 Astra vs. Claude Fable 5.1: Curated Benchmark Report Across SWE-bench Verified, FrontierMath, and Long-Context Reasoning
A curated empirical benchmark report comparing OpenAI’s GPT-6 Astra and Anthropic’s Claude Fable 5.1. Details side-by-side evaluations across SWE-bench Verified, FrontierMath Tier 4, GPQA Diamond, OSWorld agent navigation, 1.5M token context retrieval, and developer API economics.