Cheapest GPT-5 mini API: Tokemart is 94% below the official price
GPT-5 mini costs $0.250/$2.00 per 1M tokens from OpenAI. The cheapest quote is Tokemart: $0.016 in, $0.128 out. Full table and buying checklist below.
| # | Provider | 1M input | 1M output | Discount | Tokens per $100 |
|---|---|---|---|---|---|
| — | Official list | $0.250 | $2.00 | 0% | 185M |
| 1 | Tokemartdemo | $0.016 | $0.128 | −94% | 2.89B |
| 2 | SwiftRoutedemo | $0.021 | $0.166 | −92% | 2.23B |
| 3 | PromptPortdemo | $0.027 | $0.217 | −89% | 1.70B |
| 4 | ModelMilldemo | $0.041 | $0.325 | −84% | 1.13B |
| 5 | APIBridgedemo | $0.086 | $0.688 | −66% | 537M |
| 6 | FluxAPIdemo | $0.124 | $0.990 | −51% | 373M |
| 7 | RelayOnedemo | $0.141 | $1.13 | −44% | 327M |
| 8 | ByteGatedemo | $0.174 | $1.39 | −30% | 265M |
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.