What changed
A note dated August 21, 2026 on OpenAI’s GPT-5.6 page says Sol’s API and credit pricing fell by more than 20% for the following three months, without giving the new per-token figure. A July 30 note on the same page records an 80% price cut for GPT-5.6 Luna and a 20% cut for Terra. Launch prices per million tokens had been $5 / $30 for Sol, $2.50 / $15 for Terra and $1 / $6 for Luna.
Who it affects
Developers paying for GPT-5.6 through the API or with credits.
What to do
Check current rates on OpenAI’s pricing page, and plan for the Sol discount to end about three months after August 21.