How does AI humanizer pricing work?

Credit-based: 1 credit equals $0.001 USD. The AI humanizer bills per word with a 50-word floor — short snippets are charged as 50 words, longer text scales linearly. See the current per-1,000-words rate in the pricing table on this page. Failed requests are refunded automatically, so you only pay for rewrites that complete.

Does the AI humanizer bypass AI detection?

The AI humanizer is built to rewrite AI text so it reads as human-written and avoids common AI detectors. Detection is an arms race, so no AI humanizer guarantees a permanent pass against every detector forever — but the rewrite removes the cadence and phrasing that detectors key on, and you can raise the strength to "More Human" for a more aggressive pass.

What readability levels and purposes can I set?

Five readability levels (High School, University, Doctorate, Journalist, Marketing) and nine purposes (General Writing, Essay, Article, Marketing Material, Story, Cover Letter, Report, Business Material, Legal Material). Both are required on every call so the AI humanizer matches the register your text needs.

Is there a minimum text length?

Content must be at least 50 characters or the request is rejected. For billing, the AI humanizer applies a 50-word floor: text under 50 words is charged as 50 words, so very short rewrites still carry the cost of the call.

How do I get the rewrite back?

The AI humanizer is async. POST to /api/v1/humanize and you get a task_id; poll /api/v1/tasks/:id until status is completed, then read humanized_text from the output. Typical rewrites finish in a few seconds; polling adds no extra charge.

Where is the full AI humanizer API reference?

The complete parameter list, validation rules, error codes, and runnable cURL / Python / Node examples for the AI humanizer live at /docs/humanize.

Is AI Humanizer API free or paid?

Paid. Completed generations are charged at the rates in this page's pricing table. Eligible new accounts may receive promotional test credits; availability and amount are shown at signup or in the dashboard. Technical or provider failures are refunded automatically, except where this page documents a charged output-moderation block.

Does AI Humanizer API require a monthly subscription?

No. Pricing is pay-as-you-go: $1 buys 1,000 credits and credits never expire. Cost scales with what you generate rather than with a recurring fee.

How do I get an AI Humanizer API key?

Sign up and create a key in the dashboard, no card required. Pass it as a Bearer token in the Authorization header.

AI Humanizer API — Humanize AI Text So It Reads Human

This AI humanizer rewrites AI-generated text so it reads as human-written and slips past AI detectors. Send content, pick a readability and purpose, and the AI humanizer returns a clean rewrite over the same async /api/v1 task contract you already use.

Highlights: 3 strength levels · 3 engine versions · readability targeting
Best for: Making AI drafts read naturally
Input: Text to rewrite
Output: Humanized text

Input

Content*

Minimum 50 characters · longer text takes a little longer to return

Readability*

High School · University · Doctorate · Journalist · Marketing

Purpose*

Essay · Article · Cover Letter · Report · Business / Legal Material …

Strength

Quality · Balanced (default) · More Human

Model version

v2 (all languages) · v11 (best English) · v11sr (strongest English)

Result

Try one of these prompts

What is the AI Humanizer API?

AI Humanizer rewrites AI-generated text so it reads as human-written — varied rhythm, natural transitions, none of the tell-tale AI cadence — and is built to get past common AI detectors. One async call takes text of at least 50 characters plus four dials: five readability registers, nine purposes, three rewrite strengths, and three model versions. Billing is per word of the content you submit, with a 50-word floor.

What you can build with this model

Real-world workflows and production use cases you can build and ship with this model.

AI humanizer rewriting an AI draft into human-sounding text

Clean up AI drafts with the AI humanizer

Drop a raw model draft into the AI humanizer and get back copy that reads like a person wrote it — varied sentence rhythm, natural transitions, no tell-tale AI cadence. Pick a readability level and a purpose and the AI humanizer matches the register, whether it's a cover letter, a report, or marketing material. The async task contract means a content pipeline calls the AI humanizer, gets a task_id, and moves on.

Humanize a draft

AI humanizer in a content publishing pipeline

Keep SEO and content pipelines under the radar

Teams generating articles at scale run every draft through the AI humanizer as the last step before publish, so the output reads naturally and avoids being flagged as machine-written. Per-word billing means the cost of the AI humanizer tracks the work exactly: a 400-word post costs what 400 words cost, with a small 50-word floor for tiny snippets. One endpoint, one credit ledger, the same auth header as the rest of your stack.

AI humanizer producing undetectable, human-sounding writing

Bypass AI detection on student and business writing

Essays, application letters, and business documents that started as an AI draft pass through the AI humanizer to remove the AI signature while preserving meaning. Choose the Doctorate or University readability for academic register, or Journalist and Marketing for punchier copy. The AI humanizer returns the rewrite as plain text you can drop straight back into your document.

Pricing

Credit-based — 1 credit = $0.001 USD. Pay only for completed generations.

First test cost

$0.894894 credits

One sample at the cheapest tier (1,000 words).

Testing budget guide

Add credits

$10

≈ 11 tests

$50

≈ 55 tests

$100

≈ 111 tests

Model	Category	Price
Per word	Any text	$0.894 894 credits · 1,000 words

Why reAPI

An AI humanizer on one async endpoint

The AI humanizer ships on the same /api/v1 task plumbing as the rest of your stack: POST to /api/v1/humanize, get a task_id back, poll /api/v1/tasks/:id until it is done. One JSON shape, one Bearer key, one credit ledger. No new SDK, no separate billing account — the AI humanizer drops into code you already wrote.

Per-word pricing with no monthly lock-in

1 credit equals $0.001 USD. The AI humanizer bills strictly per word with a 50-word floor, so cost is proportional to the text you actually rewrite — no seat fees, no monthly minimum, no prepaid bucket to burn down. Failed requests are refunded automatically; you only pay for rewrites that come back.

Tunable readability, purpose, and strength

The AI humanizer exposes every knob the underlying model offers: five readability levels, nine purposes, three rewrite strengths, and three model versions. Nothing is hidden behind a "pro" tier — the playground on this page surfaces the full parameter set so you can dial the AI humanizer to the exact register your text needs.

AI humanizer vs in-house prompt humanizing

Why call a dedicated AI humanizer instead of asking a general LLM to "make this sound human" with a prompt? The difference is consistency, billing, and detector coverage.

Capability

AI humanizer on reApi

DIY LLM prompt

Detector coverage

Purpose-built to clear common AI detectors; rewrite strength tunable.

Hit or miss — a general model rewrites wording but often keeps the AI cadence detectors flag.

Consistency

Same readability and purpose controls produce a repeatable register every call.

Output drifts with prompt phrasing and model temperature run to run.

Billing

Per word, 50-word floor, refunded on failure — cost tracks the text exactly.

Per input + output token, charged even when the rewrite is unusable.

Integration

One /api/v1/humanize task endpoint, same auth and credit ledger as your other models.

You own the prompt, retries, and output parsing for every call.

Readability control

Five explicit levels from High School to Doctorate, plus Journalist and Marketing.

Approximated by prose in the prompt; no guaranteed register.

Setup

Send content + readability + purpose; the AI humanizer returns the rewrite as plain text.

Engineer and maintain a humanizing prompt, then test it against detectors yourself.

Comparison reflects publicly documented behavior at the time of writing. Detector outcomes vary by detector and change over time.

Integrate the AI humanizer in three steps

step 01
Create an API key
Sign up at reApi and grab a key. Free signup credits cover thousands of words through the AI humanizer — enough to validate the rewrite quality before you top up.
Open
step 02
Submit text to humanize
POST to /api/v1/humanize with model: humanize, your content, a readability, and a purpose. The AI humanizer returns a task_id immediately so your handler is free to move on.
Open
step 03
Poll for the rewrite
GET /api/v1/tasks/:id until status is completed. The response carries humanized_text — the human-sounding rewrite from the AI humanizer, ready to drop back into your document or CMS.
Open

docs/api/humanize

API reference

Drop-in code and the full parameter table.

View full reference

curl -X POST https://reapi.ai/api/v1/humanize \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "humanize",
    "content": "Your AI-generated text goes here. Make sure it is at least fifty characters long so the request is accepted.",
    "readability": "University",
    "purpose": "General Writing"
  }'

Parameter validation failed

Rejected synchronously with the failing field named. Check enum values, ranges, and URL fields — nothing is charged.

Authentication or balance issue

401 means a missing or invalid Bearer key; 402 means the reserve exceeds your balance. Manage keys and credits in the console.

Content or material rejected

Reference material and outputs pass automated moderation. Rejected tasks fail with a clear error and a full refund.

Task failed or timed out

A task that reaches a failed state is never charged — the reserve refunds automatically. Keep the task id and retry when ready.

Frequently asked questions

Common questions about this model.

An AI humanizer takes AI-generated text and rewrites it so it reads as human-written while keeping the original meaning. On reApi this AI humanizer ships as model id humanize on the /api/v1/humanize endpoint, returns the rewrite as humanized_text over an async task, and is billed per word. See the current rate in the pricing table on this page.