ProjectSPG: 86µs edge privacy proxy for LLMs

Developers launched ProjectSPG, an open edge-native proxy on Cloudflare Workers that reversibly tokenizes PII in prompts before they reach OpenAI, Anthropic, Mistral and Gemini. A benchmark across 9.33M prompts and 1.94B tokens showed 100.00% exact roundtrip fidelity at 86µs median latency and 17,735 prompts/sec per node.

• Median tokenization latency 86µs, p99 at 218µs
• 100.00% exact roundtrip fidelity across 9.33M prompts
• Throughput of 17,735 prompts/sec on a single node
• Detects PII from 109 countries, IBANs and Luhn-validated cards