Most exciting part of this announcement is probably the pricing

  Model update               Input          Output         Reduction
  -------------------------  -------------  -------------  ---------
  GPT-5.6 Sol → GPT-6 Sol     $4 → $2        $20 → $10      50%
  GPT-5.6 Luna → GPT-6 Luna   $0.20 → $0.10  $1.20 → $0.50  50%