What's different about GeeTest v4 vs v3?

v4 uses a single captchaId instead of v3's gt/challenge pair, and adds slider, icon, space, and gobang puzzle variants. CaptchaSonic supports all four variants through the same createTask endpoint.

Where do I find the GeeTest v4 captchaId?

It's embedded in the page's initGeetest4 call. Search the page source for "captchaId" — the value is a hex string that's site-specific and stable for the lifetime of the integration.

How fast does GeeTest v4 solve?

Average solve time is 5–9 seconds for slide and icon puzzles; space and gobang variants average 8–12 seconds because they require more inference passes.

Slide, icon, space & gobang

GeeTest v4 Solver

Name: GeeTest Solver API
Brand: CaptchaSonic
Price: 2.99 USD
Availability: InStock

Solve GeeTest v4 challenges — slide, icon, space, and gobang puzzles — automatically with CaptchaSonic. Pass the page captchaId; receive the verified token in 5–9 seconds.

Start Building Read Documentation

// CaptchaSonic — GeeTest v4 solver
const sonic = new CaptchaSonic('YOUR_API_KEY');

const result = await sonic.solve({
  type: 'GeeTestTaskProxyless',
  websiteURL: 'https://target.example.com/login',
  version: 4,
  initParameters: { captchaId: 'e3922bba93b748c7a8a3b9a3e1a8a1e3' }
});

console.log(result.lot_number, result.pass_token, result.gen_time, result.captcha_output);

Why use Sonic for Slide, icon, space & gobang?

Built for speed, reliability, and easy integration.

All four v4 variants

Slide, icon, space, and gobang puzzles handled through one endpoint.

Stable captchaId support

Pass only the site-specific captchaId — no per-request challenge fetching needed.

Sub-10s average

Slide and icon puzzles solve in 5–9 seconds; space/gobang at 8–12 seconds.

Built for Developers

Choose your language and start solving CAPTCHAs in seconds

Type-safe

Async/Await

Error Handling

View Full Documentation

index.js

import { CaptchaSonic } from 'captchasonic'

const client = new CaptchaSonic({
  apiKey: 'your_api_key'
})

// Solve reCAPTCHA
const result = await client.solve({
  type: 'recaptcha_v2',
  sitekey: 'site_key_here',
  pageurl: 'https://example.com'
})

console.log(result.solution)

99.9%

Success Rate

<0.5s

Avg Response

99.9%

Uptime

10k+

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