Cheapest GPT-5.6 Sol Pro API: Polza.ai is 27% below the official price
GPT-5.6 Sol Pro costs $4.00/$20.00 per 1M tokens from OpenAI. The lowest quote in the index is Polza.ai: $2.93 in, $14.63 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | vs list | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $4.00 | $20.00 | 0% | 15.0M |
| 1 | $2.93 | $14.63 | −27% | 20.5M |
Scroll the table sideways to see every price.
Tokens per $100 assume a “code” mix: 5 input tokens per output token. Prices are crawled; verify them on the provider page before buying.
What to check before buying
- Test the key with the free API checker — it verifies the endpoint responds, without sending tokens.
- Compare the blended cost for your workload, not just the input price: output tokens dominate in agent workloads.
- Check uptime and minimum top-up: the cheapest provider is useless if it is down half the day.