# StealthGPT

> StealthGPT is an AI humanizer and writing workspace for students, writers and content teams, with REST APIs, MCP tools and publishing integrations for developers and agencies.

Use the AI Humanizer to revise essays, research papers and other AI-assisted drafts. The web workspace also includes Stealth Writer with citation tools, Chat with PDF, Photo to Answers and an AI Detector. Super is the flagship humanization model; Standard is a full rewrite, and Lite is a faster, lighter edit. The model study below includes matched outputs, response times and detector results.

Developers can embed humanization, writing and text detection in an app, or use Stealth Agent for research-to-draft content workflows. REST and MCP support asynchronous runs; the review recipe covers bulk submission, callbacks and an editorial handoff. Web subscriptions and API plans are separate products. Current endpoint contracts, authentication, model selection and billing are documented at https://docs.stealthgpt.ai.

This is a curated guide to public product pages, practical workflows and published evidence. The documentation index and full-text export are listed under Developer references and machine-readable files. Benchmark pages identify their test dates, exact models and methodology; the StudySim case study identifies its relationship to StealthGPT.

Pricing snapshot in USD, checked November 8, 2026. Web subscriptions and API plans are billed separately.

| Web plan | Monthly billing | Annual charge | Words per month on monthly/annual plans | Words per request | Additional teammates |
| --- | --- | --- | --- | --- | --- |
| Pro | $29.99/month | $299.99/year | 50,000 | 1,000 | 0 |
| Max | $49.99/month | $499.99/year | 200,000 | 2,000 | 3 |
| Enterprise | $179.99/month | $1,799.99/year | 1,000,000+ | 10,000+ | 5 |

Annual plans are charged yearly and retain monthly word allowances. Weekly options, when offered, are Pro at $6.99/week with 12,500 words/week and Max at $19.99/week with 50,000 words/week. Eligible new Pro/Max customers may see a $1 three-day trial before the selected plan's recurring charge. The [web pricing page](https://www.stealthgpt.ai/pricing) lists current offers and plan features.

| API plan | Monthly price | Included plan words per billing period |
| --- | --- | --- |
| Build | $19/month | 100,000 |
| Grow | $49/month | 275,000 |
| Scale | $99/month | 600,000 |

For API humanization, usage counts input plus output words. Standard and Lite use one plan word per charged word; Super uses 2.5 plan words per charged word, so Build includes up to 40,000 Super input-plus-output words. After plan and prepaid words are used, Standard/Lite cost $0.20 per 1,000 charged words and Super costs $0.05 per 100 charged words. See [API plans](https://www.stealthgpt.ai/stealthapi#pricing) and the [API billing reference](https://docs.stealthgpt.ai/api-reference/pricing.md) for current allowances and endpoint-specific accounting.

## Essays, research papers and student writing

- [Home](https://www.stealthgpt.ai/): AI humanizer, student writing workspace and a free text-humanization demo
- [AI Humanizer](https://www.stealthgpt.ai/feature/ai-humanizer): Humanize essays, research papers and everyday drafts; inspect an actual lab-writing example and matched academic test results
- [Humanize ChatGPT essays](https://www.stealthgpt.ai/blog/how-to-humanize-chatgpt-in-2026): A student workflow for revising ChatGPT drafts, comparing the result and checking the final paper
- [Research-paper rewriting workflow](https://www.stealthgpt.ai/blog/how-to-rewrite-ai-content-into-a-research-paper): Revise a paper section by section and review citations, quotations, numbers and terminology
- [Stealth Writer](https://www.stealthgpt.ai/feature/stealth-writer): Draft essays and articles with writing and citation controls
- [Chat with PDF](https://www.stealthgpt.ai/feature/chat-with-pdf): Work with uploaded source documents
- [Photo to Answers](https://www.stealthgpt.ai/feature/photo-to-answers): Work through questions from uploaded images
- [AI Detector](https://www.stealthgpt.ai/free-ai-detector): Text checking tool
- [Turnitin workflow](https://www.stealthgpt.ai/bypass/turnitin): Academic-detector questions and the scope of published evidence for that workflow
- [GPTZero workflow](https://www.stealthgpt.ai/bypass/gptzero): Humanization and detector-specific results for GPTZero

## Published tests, model comparisons and case studies

- [Student AI humanizer study](https://www.stealthgpt.ai/blog/student-ai-humanizer-study): A 29-text academic subset of the October competitor benchmark, with downloadable data and separately dated live academic-writing tests
- [Super vs Standard vs Lite](https://www.stealthgpt.ai/blog/super-vs-standard-vs-lite-humanizer-models): Three matched academic passages, all nine actual outputs, external detector evidence, recorded API timings and usage from November 7, 2026
- [API document-preservation evidence](https://www.stealthgpt.ai/blog/humanizer-api-document-preservation-test): Six live calls, explicit source-span protection, an unprotected control, complete outputs and runnable reproduction scripts
- [AI humanizer API comparison](https://www.stealthgpt.ai/blog/top-ai-humanizer-api-of-2026): Seven providers compared on developer and agent workflows, pricing, formatting and data handling, reviewed November 7, 2026
- [StudySim API case study](https://www.stealthgpt.ai/blog/studysim-stealthgpt-api-case-study): A related XYZAI product's Super quality-mode publishing workflow, with original Google Search Console exports and observed results
- [Published humanizer benchmarks](https://www.stealthgpt.ai/best-ai-humanizers): HumanizerEval October 2026 detector pass rates and HumanizerBench November 2026 readability/overall results, with test settings and source links
- [HumanizerEval methodology](https://www.stealthgpt.ai/methodology): Test conditions and published data for the StealthGPT-team-operated evaluation using external detector models
- [Detector results](https://www.stealthgpt.ai/best-ai-detectors): How detectors behaved on HumanizerEval's humanized-text corpus, with the metric's scope

## Apps, agents and publishing integrations

- [StealthGPT API](https://www.stealthgpt.ai/stealthapi): Super, Standard and Lite humanization, AI detection, async runs and bulk submission
- [MCP tools](https://www.stealthgpt.ai/mcp): Humanize existing drafts, start Stealth Agent content workflows and retrieve run results from a compatible assistant
- [Stealth Agent](https://www.stealthgpt.ai/feature/stealth-agent): Research-to-draft content workflows
- [Codex setup](https://docs.stealthgpt.ai/api-reference/integrations/codex.md): OAuth setup and a dated verified humanize_text and get_run_status workflow
- [Humanize and review recipes](https://docs.stealthgpt.ai/api-reference/recipes/humanize-review.md): TypeScript and Python single/bulk clients with retries, saved run references, signed callbacks and editorial review files
- [Stealth Agent API guide](https://docs.stealthgpt.ai/api-reference/stealth-agent/overview.md): Research, drafting and humanization, with optional fact checking and images
- [n8n integration](https://docs.stealthgpt.ai/api-reference/integrations/n8n.md): Community node start/status workflows, plus HTTP Request guidance for explicit Super selection and bulk API jobs
- [WordPress integration](https://docs.stealthgpt.ai/api-reference/integrations/wordpress.md): Generate or humanize content into drafts for review
- [Zapier integration](https://docs.stealthgpt.ai/api-reference/integrations/zapier.md): Connect asynchronous generation and humanization to other applications

## Developer references and machine-readable files

- [API documentation index](https://docs.stealthgpt.ai/llms.txt): Markdown sources for the developer documentation
- [Full documentation as text](https://docs.stealthgpt.ai/llms-full.txt): Complete developer documentation in one text file; individual pages are also available at their linked .md URLs
- [Introduction](https://docs.stealthgpt.ai/api-reference/introduction.md): API capabilities and getting started
- [Authentication](https://docs.stealthgpt.ai/api-reference/authentication.md): REST credentials and account access
- [Quick start](https://docs.stealthgpt.ai/api-reference/quickstart.md): A first API request
- [Models](https://docs.stealthgpt.ai/api-reference/models.md): Super, Standard and Lite model controls
- [Synchronous humanization](https://docs.stealthgpt.ai/api-reference/endpoints/stealthify.md): Humanize a draft or write from a prompt
- [Async humanization](https://docs.stealthgpt.ai/api-reference/endpoints/stealthify-runs.md): Create a run, retrieve status and receive callbacks
- [Bulk async runs](https://docs.stealthgpt.ai/api-reference/endpoints/stealthify-runs-bulk.md): Submit up to 100 items with per-item keys and collect individual results
- [MCP reference](https://docs.stealthgpt.ai/api-reference/integrations/mcp.md): Remote server, tools, authentication and billing choices
- [Text preservation](https://docs.stealthgpt.ai/api-reference/text-preservation.md): Controls for source spans that must remain exact
- [API pricing](https://docs.stealthgpt.ai/api-reference/pricing.md): Plan allowances, input-plus-output accounting and model multipliers
- [Data handling](https://docs.stealthgpt.ai/api-reference/data-handling.md): Account history, processing roles, callbacks and policy references
- [Error handling](https://docs.stealthgpt.ai/api-reference/error-handling.md): Status codes and recovery guidance
- [Changelog](https://docs.stealthgpt.ai/api-reference/changelog.md): Dated API and documentation updates
- [OpenAPI specification](https://docs.stealthgpt.ai/api-reference/openapi.json): Machine-readable endpoint and response schemas
- [Student comparison detector records (CSV)](https://cdn.sanity.io/files/8z7k3oyv/production/87e2df518a19ee3671045d7b1ff7f5627b312783.csv): Normalized external detector records from the November 7 academic comparison; settings, original texts and editorial findings are documented in the student study
- [Website sitemap](https://www.stealthgpt.ai/sitemap.xml): Canonical public product, integration and comparison URLs, including translated pages
- [Blog sitemap index](https://www.stealthgpt.ai/blog/sitemap-index.xml): Current article URLs and content update dates

## Business, plans and apps

- [Business](https://www.stealthgpt.ai/business): Choose browser, REST API, MCP or n8n routes for a content team
- [Agencies](https://www.stealthgpt.ai/business/agencies): Client campaigns and article pipelines with approved-source-span protection, review handoffs and published API evidence
- [Pricing](https://www.stealthgpt.ai/pricing): Web-product plans and account usage; API plans and API billing have their own reference
- [Chrome Extension](https://www.stealthgpt.ai/feature/chrome-extension): Bring writing and humanization into supported browser workflows
- [Chrome Web Store](https://chromewebstore.google.com/detail/stealthgpt/cgbeoilpeagnpjjhfoomncafmnebikmb): Browser extension listing
- [iOS app](https://apps.apple.com/app/stealthgpt/id6739302300): App Store listing

## Humanizer alternatives

- [StealthGPT vs Undetectable AI](https://www.stealthgpt.ai/alternatives/undetectable-ai): Fresh matched academic passages, exact v11sr settings, saved rewrites and separately dated October benchmark results
- [StealthGPT vs HIX.ai](https://www.stealthgpt.ai/alternatives/hix-ai): Side-by-side comparison with HIX.ai
- [StealthGPT vs Walter Writes](https://www.stealthgpt.ai/alternatives/walter-writes): Side-by-side comparison with Walter Writes
- [StealthGPT vs StealthWriter](https://www.stealthgpt.ai/alternatives/stealth-writer): Side-by-side comparison with StealthWriter
- [StealthGPT vs Phrasly](https://www.stealthgpt.ai/alternatives/phrasly): Side-by-side comparison with Phrasly.ai
- [StealthGPT vs Humbot](https://www.stealthgpt.ai/alternatives/humbot): Side-by-side comparison with Humbot AI
- [StealthGPT vs AIHumanize.io](https://www.stealthgpt.ai/alternatives/ai-humanize-io): Side-by-side comparison with AIHumanize.io
- [StealthGPT vs Grammarly](https://www.stealthgpt.ai/alternatives/grammarly): Side-by-side comparison with Grammarly
- [StealthGPT vs WriteHuman](https://www.stealthgpt.ai/alternatives/write-human): Matched academic results using WriteHuman Standard API with Enhanced off, actual rewrites and current plan distinctions
- [StealthGPT vs BypassGPT](https://www.stealthgpt.ai/alternatives/bypassgpt): Side-by-side comparison with BypassGPT
- [StealthGPT vs Rephrasy](https://www.stealthgpt.ai/alternatives/rephrasy): Side-by-side comparison with Rephrasy
- [StealthGPT vs RewriteAI](https://www.stealthgpt.ai/alternatives/rewriteai): Side-by-side comparison with RewriteAI

## Editing tools

- [Text enhancement](https://www.stealthgpt.ai/use-cases/enhancer): Refine phrasing and flow
- [Text simplification](https://www.stealthgpt.ai/use-cases/simplifier): Make a draft easier to read
- [Summaries](https://www.stealthgpt.ai/use-cases/summarizer): Summarize source material
- [Grammar](https://www.stealthgpt.ai/use-cases/grammar-checker): Edit spelling and grammar
- [Sentence rewriting](https://www.stealthgpt.ai/use-cases/sentence-rewriter): Rework individual sentences
- [Paragraph drafting](https://www.stealthgpt.ai/use-cases/paragraph-generator): Draft a paragraph from a brief
- [Formal writing](https://www.stealthgpt.ai/use-cases/formalizer): Adjust a draft toward a professional tone

## Company, policies and support

- [Blog](https://www.stealthgpt.ai/blog): Product guides, research and comparisons
- [Support](https://www.stealthgpt.ai/support): Product and integration help
- [Service status](https://stealthgpt.betteruptime.com): Service availability information
- [Privacy Policy](https://www.stealthgpt.ai/privacy): Applicable information-processing and retention policy
- [Terms of Service](https://www.stealthgpt.ai/tos): Applicable site and API terms

## Optional

- [Prompt generation](https://www.stealthgpt.ai/use-cases/prompt-generator): Develop prompts for a writing task
- [SEO editing](https://www.stealthgpt.ai/use-cases/seo-optimizer): Editorial workflow for search-focused content
- [Watermark-related tools](https://www.stealthgpt.ai/use-cases/watermark-remover): Overview of watermark-related writing workflows
- [Claude watermark workflow](https://www.stealthgpt.ai/use-cases/claude-watermark-remover): Claude-related source-text rewriting workflow
- [ChatGPT watermark rewriting](https://www.stealthgpt.ai/use-cases/chatgpt-watermark-remover): ChatGPT-related source-text rewriting workflow
- [ChatGPT watermark checking](https://www.stealthgpt.ai/use-cases/chatgpt-watermark-detector): Product page for ChatGPT-related text checks
- [Gemini SynthID rewriting](https://www.stealthgpt.ai/use-cases/gemini-synthid-remover): Gemini-related source-text rewriting workflow
- [Gemini SynthID checking](https://www.stealthgpt.ai/use-cases/gemini-synthid-detector): Product page for Gemini-related text checks