OpenAI's GPT-6.1 Sol Reaches 1,759 Points on Code Arena WebDev, Reshaping Cost-Efficiency Frontier

OpenAI has released GPT-6.1 Sol, a cost-efficient language model that scores 1,759 points on Code Arena: WebDev—a 70-point improvement over GPT-6 Sol while maintaining the same $8 per million token blended pricing, fundamentally reshaping the model selection landscape for production AI systems. Unveiled at OpenAI's DevDay on September 29, 2026, just one week after launching GPT-6 Sol, GPT-6.1 Sol delivers near-parity intelligence with the flagship GPT-6 Astra model at one-fifth of Astra's standard token prices. On the Intelligence Index, GPT-6.1 Sol scores just 1 point below Astra despite costing approximately $0.72 per task compared to $3.26 for Astra—a 78% cost reduction per unit of work.