Every AI API gateway I tried added an invisible margin. OpenRouter, the biggest player, quietly marks up every model. You pay more than the provider charges, and you don't even know how much.
I built aipossword.cn — an open-source AI API gateway with zero markup pricing.
| Model | Input/1M | Output/1M |
|---|---|---|
| DeepSeek V4 Pro | $0.20 | $0.87 |
| DeepSeek V4 Flash | $0.10 | $0.20 |
| Claude Opus 4.6 | $15.00 | $75.00 |
| Claude Opus 4.7 | $15.00 | $75.00 |
| Qwen 3.7 Max | $1.25 | $3.75 |
curl https://api.aipossword.cn/v1/chat/completions \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model":"deepseek-v4-flash","messages":[{"role":"user","content":"Hello"}]}'
I got tired of paying hidden fees on every API call. So I forked New API (18k stars), connected 18 models, and set markup to zero.
Is zero markup sustainable? I think the answer is yes — if enterprise users pay for SSO, SLA, and dedicated infrastructure. Individual developers get it free, at cost.
Visit aipossword.cn — free $5 credits, no credit card required.
Source: github.com/QuantumNous/new-api
source & further reading
dev.to — original article
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