Cheapest GPT-5.5 API: Tokemart is 94% below the official price
GPT-5.5 costs $5.00/$30 per 1M tokens from OpenAI. The cheapest quote is Tokemart: $0.306 in, $1.84 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $5.00 | $30.00 | 0% | 10.9M |
| 1 | Tokemartdemo | $0.306 | $1.84 | −94% | 178M |
| 2 | SwiftRoutedemo | $0.443 | $2.65 | −91% | 123M |
| 3 | PromptPortdemo | $0.593 | $3.56 | −88% | 91.9M |
| 4 | ModelMilldemo | $0.836 | $5.01 | −83% | 65.3M |
| 5 | APIBridgedemo | $1.44 | $8.65 | −71% | 37.8M |
| 6 | FluxAPIdemo | $2.15 | $12.92 | −57% | 25.3M |
| 7 | RelayOnedemo | $2.72 | $16.34 | −46% | 20.0M |
| 8 | ByteGatedemo | $4.00 | $23.98 | −20% | 13.6M |
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.