Cheapest Claude Opus 5.5 API: Tokemart is 95% below the official price
Claude Opus 5.5 costs $4.00/$20 per 1M tokens from Anthropic. The cheapest quote is Tokemart: $0.215 in, $1.08 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $4.00 | $20.00 | 0% | 15.0M |
| 1 | Tokemartdemo | $0.215 | $1.08 | −95% | 279M |
| 2 | SwiftRoutedemo | $0.316 | $1.58 | −92% | 190M |
| 3 | ClaudePooldemo | $0.399 | $1.99 | −90% | 150M |
| 4 | PromptPortdemo | $0.425 | $2.13 | −89% | 141M |
| 5 | ModelMilldemo | $0.636 | $3.18 | −84% | 94.3M |
| 6 | NovaRelaydemo | $0.819 | $4.09 | −80% | 73.3M |
| 7 | FluxAPIdemo | $1.78 | $8.92 | −55% | 33.6M |
| 8 | RelayOnedemo | $2.15 | $10.77 | −46% | 27.9M |
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.