GPT-5.6 Sol costs $8.98 per million words.
OpenAI lists it at $4 per million input tokens and $20 per million output tokens on OpenAI’s pricing page, read 4:40 PM Eastern, Oct 7, 2026. It bills about 1,123 tokens for a thousand English words, so a million words, three in for every one out, costs $8.98.
OpenAI’s pricing page adds: “GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.” The price above is the one in OpenAI’s table.
- Maker
- OpenAI
- Input
- $4 per million tokens
- Output
- $20 per million tokens
- Cached input
- $0.40 per million tokens
- Tokens for 1,000 words
- 1,123, measured by Brass on Oct 7, 2026
- Source
- OpenAI’s pricing page
Brass does not offer GPT-5.6 Sol in its chat. The nearest model it offers from OpenAI is GPT-6.1 Sol: $4.49 per million words at OpenAI’s price, $5.61 in the Brass chat.
To use the models Brass offers, buy a pack.
Price history
| From | Per million words | Per million tokens, in / out |
|---|---|---|
| Oct 7, 2026 | $8.98 | $4 / $20 |
We began tracking GPT-5.6 Sol on Oct 7, 2026.