Cheapest Claude Opus 4.1 API: Polza.ai is -47% below the official price
Claude Opus 4.1 costs $15/$75 per 1M tokens from Anthropic. The cheapest quote is Polza.ai: $22 in, $110 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $15.00 | $75.00 | 0% | 4.00M |
| 1 | $22.03 | $110.17 | — | 2.72M |
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.