GPT-6.1 Sol replaces GPT-6 Sol after just 7 days, with near-Astra intelligence
Summary
GPT-6.1 Sol replaces GPT-6 Sol after seven days, achieving near-Astra intelligence at a lower cost per task. The article details gains across multiple evaluation indexes, improved coding agent performance, and a strengthened cost and token efficiency frontier, with a modest increase in output tokens.