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GPTinf vs StealthGPT

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Only GPTinf (StealthGPT has paid plans only)
Public API
StealthGPT has one; not confirmed by us for GPTinf
Higher Trust score
StealthGPT — 86 vs 70 for GPTinf
Best fit
GPTinf: marketers loosening obviously templated AI copy before a human edit pass · StealthGPT: Content operations running bulk rewriting through an API or n8n workflow
Platforms
GPTinf: Web · StealthGPT: Web, Chrome extension, iOS

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Side by side

FactGPTinfStealthGPT
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumPaid
Public APINot confirmedYes
Trust score70 / 10086 / 100
PlatformsWebWeb, API, Chrome extension, iOS
Company—XYZ AI, Inc.
Launched—2023
Last verifiedOct 15, 2026Oct 22, 2026

What our research says

GPTinf

This is a detector-evasion rewriter and you should judge it as exactly that. If you are a student, running coursework through it is an academic-integrity violation whether or not the detector catches you.

Pros

  • word locking preserves citations, proper nouns and product names through the rewrite
  • a usable trial runs without an account, so you can judge output before paying
  • priced by word volume rather than per seat, which suits occasional use
  • one screen, no setup, no onboarding

Cons

  • independent reviews rate output as inconsistent, particularly across longer paragraphs
  • detector evasion is an arms race, so what passes this month can fail next month
  • no company name, team or jurisdiction disclosed anywhere on the site
  • no API, so it cannot be wired into a content pipeline

StealthGPT

The only thing here that competitors do not match is the developer surface — REST API, MCP server and n8n node — so this is the humanizer you pick if you are automating a content pipeline, not the one you pick to write an essay. Everything it sells is a bet on an arms race the detector vendors are also funding.

Pros

  • Genuine developer stack — documented API reference plus an MCP server, which rivals lack
  • Bundled detector lets you check before and after in one place
  • Chrome extension humanizes directly in any text field
  • Enterprise tier handles up to 20,000 words per run

Cons

  • Pricing page is behind a Vercel bot check, so prices cannot be compared without signing up
  • Daily request caps sit behind plans that market themselves as unlimited
  • Rewriting reliably flattens nuance and introduces awkward phrasing that needs an editing pass
  • Positioning around beating Turnitin invites institutional and reputational risk

Which one fits

Choose GPTinf if you need

  • marketers loosening obviously templated AI copy before a human edit pass
  • stress-testing how brittle your own organisation's AI-detection policy is
  • writers who want a paraphrase pass with specific terms locked in place

Choose StealthGPT if you need

  • Content operations running bulk rewriting through an API or n8n workflow
  • Non-native English writers softening obviously templated LLM prose
  • Agencies that need humanizing inside an existing WordPress or Zapier stack

GPTinf vs StealthGPT: the questions people ask

Does GPTinf or StealthGPT have a free tier?

GPTinf has a free tier; StealthGPT has paid plans only.

Which has a public API, GPTinf or StealthGPT?

StealthGPT ships a public API, as of our last verification. A public API for GPTinf is not confirmed by us — check its developer docs before you plan an integration.

All GPTinf alternatives →Browse all AI Detection & Humanizers →