Frequently asked questions
Everything you might want to know about QuickSilver Pro — the OpenAI-compatible inference API for DeepSeek V3, R1, and Qwen3.5-35B-A3B.
Frequently asked questions
What is QuickSilver Pro?
An OpenAI-compatible HTTP API for the top open-source LLMs — DeepSeek V3, DeepSeek R1, and Qwen3.5-35B-A3B. Point the official OpenAI SDK at our base URL and get the same chat-completions interface, 20% below competing resellers.
Which models do you support?
Three models: DeepSeek V3 (general chat, coding, tool calling), DeepSeek R1 (reasoning, math), and Qwen3.5-35B-A3B (262K long-context RAG). All served through a single OpenAI-compatible endpoint.
How much cheaper than OpenRouter / OpenAI?
20% below the public per-token rates at OpenRouter, Together AI, Fireworks AI, and DeepInfra on the same open-source models. DeepSeek V3: $0.24 / $0.70. DeepSeek R1: $0.40 / $1.70. Qwen3.5-35B-A3B: $0.13 / $1.00. We don't serve closed models (GPT-4, Claude).
Is it really a drop-in OpenAI replacement?
Yes. Change base_url to https://api.quicksilverpro.io/v1 in the official openai Python / Node / Swift SDKs. Streaming, tool calling, json_schema strict mode, and usage.cost accounting all work out of the box.
Does it work with Aider, Cline, Cursor, LangChain, Vercel AI SDK?
Yes — any tool that accepts an OpenAI base_url and API key. Set base_url to https://api.quicksilverpro.io/v1, paste your QSP key, and choose deepseek-v3, deepseek-r1, or qwen3.5-35b as the model.
How do I migrate from OpenRouter?
Change base_url from api.openrouter.ai/api/v1 to api.quicksilverpro.io/v1. Swap API key. Model IDs: deepseek/deepseek-chat-v3-0324 → deepseek-v3, deepseek/deepseek-r1 → deepseek-r1, qwen/qwen3-35b-a3b → qwen3.5-35b.
Is there a free tier?
New accounts get $1 in free credits on registration — enough for ~500-700 real DeepSeek V3 calls to evaluate the service. After that it's pay-as-you-go starting at $5, no subscription.
Can I try without signing up?
Yes — we host a free HuggingFace Space at huggingface.co/spaces/MachineFi/QuickSilverPro-Chat where you can chat with all three models in a browser. No signup or API key needed.
Who operates this?
MachineFi Inc., a Delaware corporation based in Menlo Park, CA. Payments are processed by Stripe and appear on your statement as MACHINEFI INC.
Still have questions?
hello@quicksilverpro.ioBuilt by MachineFi Labs.