Sol now costs over 20% less, (Terra costs 20% less, and Luna costs 80% less.)
- Sol’s promotional pricing is available at least through November 21, 2026.
GPT-5.6 API pricing changes - July 30 + Sol promo Aug 21 - Nov 21+
Prices are in USD per 1 million tokens. New for “Sol” is the promotional price reduction
| Model | Input — Old | Input — New | Cached — Old | Cached — New | Output — Old | Output — New |
|---|---|---|---|---|---|---|
| GPT-5.6 Sol | $5.00 | $4.00 | $0.50 | $0.40 | $30.00 | $20.00 |
| GPT-5.6 Terra | $2.50 | $2.00 | $0.25 | $0.20 | $15.00 | $12.00 |
| GPT-5.6 Luna | $1.00 | $0.20 | $0.10 | $0.02 | $6.00 | $1.20 |