GPT-6.1 Sol replaces GPT-6 Sol after just 7 days, with near-Astra intelligence

GPT-6.1 Sol replaces GPT-6 Sol after seven days, offering intelligence levels near GPT-6 Astra. For Responses-based coding agents, GPT-6.1 Sol is the recommended default. Users should retain GPT-6 Sol if integrations rely on disabled reasoning, while GPT-6 Astra is suitable when additional correct work justifies its premium cost. This selection framework emphasizes compatibility, complete-task costs, and whether resulting patches pass acceptance tests over simple intelligence versus token price comparisons for BeatAPI integrations.