Cheapest Claude Sonnet 4.5 API: Tokemart is 94% below the official price
Claude Sonnet 4.5 costs $3.00/$15 per 1M tokens from Anthropic. The cheapest quote is Tokemart: $0.189 in, $0.947 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $3.00 | $15.00 | 0% | 20.0M |
| 1 | Tokemartdemo | $0.189 | $0.947 | −94% | 317M |
| 2 | SwiftRoutedemo | $0.251 | $1.26 | −92% | 239M |
| 3 | ClaudePooldemo | $0.272 | $1.36 | −91% | 220M |
| 4 | PromptPortdemo | $0.355 | $1.78 | −88% | 169M |
| 5 | ModelMilldemo | $0.449 | $2.25 | −85% | 134M |
| 6 | NovaRelaydemo | $0.632 | $3.16 | −79% | 95.0M |
| 7 | FluxAPIdemo | $1.37 | $6.85 | −54% | 43.8M |
| 8 | RelayOnedemo | $1.65 | $8.26 | −45% | 36.3M |
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.