Cheapest Claude Sonnet 4 API: Tokemart is 94% below the official price
Claude Sonnet 4 costs $3.00/$15 per 1M tokens from Anthropic. The cheapest quote is Tokemart: $0.171 in, $0.852 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 | $0.171 | $0.852 | −94% | 352M |
| 2 | SwiftRoutedemo | $0.226 | $1.13 | −92% | 266M |
| 3 | ClaudePooldemo | $0.278 | $1.39 | −91% | 216M |
| 4 | PromptPortdemo | $0.344 | $1.72 | −89% | 175M |
| 5 | ModelMilldemo | $0.468 | $2.34 | −84% | 128M |
| 6 | NovaRelaydemo | $0.662 | $3.31 | −78% | 90.6M |
| 7 | FluxAPIdemo | $1.26 | $6.31 | −58% | 47.5M |
| 8 | RelayOnedemo | $1.70 | $8.48 | −43% | 35.4M |
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.