AI API Gateway Load Testing 2026

// Key performance metrics to monitor const performanceMetrics = { "response_time": { average: 142, // milliseconds p95: 245, p99: 498 }, "throughput": { requests_per_minute: 1200, requests_per_second: 20 }, "error_rate": { http_errors: 1.3, // percentage timeout_errors: 0.5, connection_errors: 0.2 }, "concurrency": { active_connections: 850, max_connections: 1000 } };

// k6 load testing configuration import http from 'k6/http'; import { check, sleep } from 'k6'; export const options = { stages: [ { duration: '2m', target: 100 }, // ramp up { duration: '5m', target: 100 }, // steady state { duration: '2m', target: 500 }, // stress { duration: '2m', target: 1000 }, // peak { duration: '3m', target: 0 }, // ramp down ], thresholds: { 'http_req_duration': ['p(95) < 500'], 'http_req_failed': ['rate < 0.01'], }, }; export default function () { const params = { headers: { 'Authorization': 'Bearer YOUR_API_KEY', 'Content-Type': 'application/json', }, }; const payload = JSON.stringify({ model: "gpt-4", prompt: "Load testing AI gateway performance...", max_tokens: 100, }); const res = http.post('http://your-gateway.com/v1/completions', payload, params); check(res, { 'status is 200': (r) => r.status === 200, 'response time < 500ms': (r) => r.timings.duration < 500, }); sleep(1); }