OpenAI Releases GPT-6.1 Sol, Bringing Near-Flagship Performance at One-Fifth the Cost

OpenAI unveiled GPT-6.1 Sol on September 29, 2026, at its annual DevDay conference, positioning the new model as a cost-effective powerhouse that delivers near-GPT-6 Astra performance on professional workflows, coding, and computer use tasks while cutting token prices to just one-fifth of its flagship offering. The model is priced at $2 per million input tokens and $10 per million output tokens, compared to Astra's standard $10 and $50 pricing—a dramatic shift that makes advanced AI reasoning accessible to developers and enterprises of all sizes.