LLM API Cost Calculator
Answer
Default scenario (100M input + 20M output tokens/month, no cache): cheapest is Qwen3.7 Flash (OpenRouter) at about $5.6/month; next Hunyuan-A13B at $13.44/month. Edit the inputs to recalculate. （source · verified）
Estimate monthly API cost across models from your token usage, in USD or CNY.
| Model | Channel | Monthly cost |
|---|---|---|
| GPT-6.1 Sol | Official (Intl) | — |
| GPT-6 Astra | Official (Intl) | — |
| GPT-6 Luna | Official (Intl) | — |
| GPT-5.5 | OpenRouter | — |
| GPT-5.4 mini | OpenRouter | — |
| Claude Fable 5.1 | Official (Intl) | — |
| Claude Opus 5.5 | Official (Intl) | — |
| Claude Sonnet 5.5 | Official (Intl) | — |
| Claude Haiku 5.5 | Official (Intl) | — |
| Gemini 4 Argon | Official (Intl) | — |
| Gemini 3.8 Flash | Official (Intl) | — |
| Gemini 3.5 Flash-Lite | Official (Intl) | — |
| Grok 4.7 | Official (Intl) | — |
| Grok 4.3 | Official (Intl) | — |
| DeepSeek V4.1 Flash | Official (China) | — |
| DeepSeek V4 Pro (0813) | Official (Intl) | — |
| Qwen3.8 Max Prime | Official (China) | — |
| Qwen3.8 Max (0902) | Official (China) | — |
| Qwen3.8 Flash | Official (China) | — |
| Qwen3.7 Plus | Official (China) | — |
| Kimi K3 | Official (China) | — |
| Kimi K2.7 Code | OpenRouter | — |
| GLM-5.3 Prime | OpenRouter | — |
| GLM-5.3 | Official (China) | — |
| GLM-5.3 Flash | Official (China) | — |
| MiniMax-M3 | OpenRouter | — |
| Hunyuan HY4 Preview | OpenRouter | — |
| Hunyuan HY3 | OpenRouter | — |
| GPT-6 Sol | OpenRouter | — |
| GPT-5.6 Sol | OpenRouter | — |
| GPT-5.6 Terra | OpenRouter | — |
| GPT-5.6 Luna | OpenRouter | — |
| GPT-5.4 nano | OpenRouter | — |
| GPT-5.5 Pro | OpenRouter | — |
| Claude Opus 5 | OpenRouter | — |
| Claude Sonnet 5 | OpenRouter | — |
| Claude Opus 4.8 | OpenRouter | — |
| Gemini 3.6 Flash | Official (Intl) | — |
| Gemini 3.1 Flash-Lite | Official (Intl) | — |
| Gemini 3.1 Pro Preview | Official (Intl) | — |
| Gemini 2.5 Pro | Official (Intl) | — |
| Gemini 2.5 Flash | Official (Intl) | — |
| Gemini 2.5 Flash-Lite | Official (Intl) | — |
| Gemma 4 31B | OpenRouter | — |
| Grok 4.6 | Official (Intl) | — |
| Grok 4.5 | Official (Intl) | — |
| Grok Build 0.1 | Official (Intl) | — |
| Grok 4.20 | Official (Intl) | — |
| DeepSeek V4 Pro | OpenRouter | — |
| DeepSeek V4 Flash | OpenRouter | — |
| Qwen3.7 Max | OpenRouter | — |
| Qwen3.8 Omni Flash | OpenRouter | — |
| Qwen3.7 Flash | OpenRouter | — |
| Qwen3.8 27B | OpenRouter | — |
| Kimi K2.6 | OpenRouter | — |
| GLM-5.2 | Official (China) | — |
| GLM-5.3 FlashX | OpenRouter | — |
| GLM-5V Turbo | OpenRouter | — |
| MiniMax-M2.7 | OpenRouter | — |
| Hunyuan-A13B | Official (China) | — |
| Hunyuan HY3 Preview | OpenRouter | — |
| Doubao Seed 2.1 Pro | Official (China) | — |
| Doubao Seed 2.1 Turbo | Official (China) | — |
| Doubao Seed Evolving | Official (China) | — |
| Seed 2.0 Code | OpenRouter | — |
| ERNIE 5.1 | Official (China) | — |
| ERNIE 5.0 | Official (China) | — |
| ERNIE 4.5 Turbo 128K | Official (China) | — |
| ERNIE X1.1 Preview | Official (China) | — |
| Mistral Large 4 | OpenRouter | — |
| Mistral Medium 3.5 | OpenRouter | — |
| MiMo V2.6 Pro | OpenRouter | — |
| MiMo V2.6 Flash | OpenRouter | — |
| Step 5 Preview | OpenRouter | — |
| Nemotron 3 Ultra 550B A55B | OpenRouter | — |
| DeepSeek V4 Flash 0731 | OpenRouter | — |