AI API monthly cost calculator
Enter your real request pattern and compare every available channel for up to four models. Native prices stay in their published currency; ranking is normalised to USD.
1. Usage
Daily usage is converted using a 30-day month.
0%
Channels without a published cache price use the regular input price.
0%
Assumes the common 50% Batch discount; confirm channel eligibility before use.
30K
requests/mo
30M
input/mo
15M
output/mo
2. Models and region
GPT 6 AstraClaude Fable 5.1Gemini 3.8 Flash3/4
Monthly cost comparison
Paid channels are sorted by USD-normalised monthly cost.
| Model | Channel | Input price | Output price | Cache | Est. monthly |
|---|---|---|---|---|---|
| Gemini 3.8 Flash | OpenRouterGlobal | $0.38/1M | $1.88/1M | $0.04 | $39.38Lowest paidUSD normalised |
| Gemini 3.8 Flash | Gemini(Google)Global | $0.75/1M | $3.75/1M | — | $78.75USD normalised |
| Gemini 3.8 Flash | Google Vertex AIGlobal | $0.75/1M | $3.75/1M | — | $78.75USD normalised |
| Gemini 3.8 Flash | OpenRouterGlobal | $0.75/1M | $3.75/1M | $0.08 | $78.75USD normalised |
| GPT 6 Astra | XiuRouterGlobal | $0.88/1M | $5.25/1M | $0.09 | $105.00USD normalised |
| Claude Fable 5.1 | XiuRouterGlobal | $2.30/1M | $11.50/1M | $0.06 | $241.50USD normalised |
| GPT 6 Astra | OpenRouterGlobal | $5.00/1M | $25.00/1M | $0.50 | $525.00USD normalised |
| Claude Fable 5.1 | OpenRouterGlobal | $5.00/1M | $25.00/1M | $0.13 | $525.00USD normalised |
| GPT 6 Astra | OpenRouterGlobal | $10.00/1M | $50.00/1M | $1.00 | $1,050.00USD normalised |
| GPT 6 Astra | OpenAIGlobal | $10.00/1M | $50.00/1M | $1.00 | $1,050.00USD normalised |
| Claude Fable 5.1 | AnthropicGlobal | $10.00/1M | $50.00/1M | $0.25 | $1,050.00USD normalised |
| Claude Fable 5.1 | OpenRouterGlobal | $10.00/1M | $50.00/1M | $0.25 | $1,050.00USD normalised |