Cheapest DeepSeek V3.1 API: SwiftRoute is 87% below the official price
DeepSeek V3.1 costs $0.270/$1.10 per 1M tokens from DeepSeek. The cheapest quote is SwiftRoute: $0.036 in, $0.147 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $0.270 | $1.10 | 0% | 245M |
| 1 | SwiftRoutedemo | $0.036 | $0.147 | −87% | 1.83B |
| 2 | ModelMilldemo | $0.055 | $0.222 | −80% | 1.21B |
| 3 | NovaRelaydemo | $0.088 | $0.358 | −67% | 752M |
| 4 | APIBridgedemo | $0.109 | $0.445 | −60% | 606M |
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.