OpenAI launches GPT-6 Sol and Luna, saying Sol makes about half as many mistakes as GPT-5.6 Sol and Luna matches GPT-5.6 Sol's performance at ~1% of the cost (David Gewirtz/ZDNET)

OpenAI has launched GPT-6 Sol and Luna, less than three months after GPT-5.6. According to OpenAI, GPT-6 Sol makes approximately half as many mistakes as GPT-5.6 Sol. Furthermore, GPT-6 Luna achieves the same performance as GPT-5.6 Sol but at roughly 1% of the cost, indicating significant accuracy improvements and dramatic cost reductions in their latest models.

This report details OpenAI's GPT-6 Sol achieving half the error rate of GPT-5.6 Sol, and GPT-6 Luna matching GPT-5.6 Sol's performance at 1% of the cost, unlike previous iterations.