QuickSilver Pro: OpenAI-compatible API for DeepSeek V3, R1, and Qwen3.5-35B

QuickSilver Pro is a drop-in OpenAI-compatible API for the three most popular open-source LLMs — DeepSeek V3 (general chat, coding, structured JSON), DeepSeek R1 (reasoning and math), and Qwen3.5-35B-A3B (3B active MoE with a 262K context window for long-document RAG). Pricing is 20% below OpenRouter on all three models, and up to 76% below Together AI on DeepSeek R1 output. Migration from an existing OpenAI SDK deployment takes two lines — change only the base URL and the API key. Streaming, tool / function calling, strict json_schema output, and standard usage accounting (with a synthetic usage.cost on every response) all work unchanged. Pay-as-you-go starts at a $5 minimum; new accounts get $0.10 in free credits.